/* mdbx_load.c - memory-mapped database load tool */ /* * Copyright 2015-2021 Leonid Yuriev * and other libmdbx authors: please see AUTHORS file. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted only as authorized by the OpenLDAP * Public License. * * A copy of this license is available in the file LICENSE in the * top-level directory of the distribution or, alternatively, at * . */ #ifdef _MSC_VER #if _MSC_VER > 1800 #pragma warning(disable : 4464) /* relative include path contains '..' */ #endif #pragma warning(disable : 4996) /* The POSIX name is deprecated... */ #endif /* _MSC_VER (warnings) */ #define xMDBX_TOOLS /* Avoid using internal mdbx_assert() */ /* * Copyright 2015-2021 Leonid Yuriev * and other libmdbx authors: please see AUTHORS file. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted only as authorized by the OpenLDAP * Public License. * * A copy of this license is available in the file LICENSE in the * top-level directory of the distribution or, alternatively, at * . */ #define MDBX_BUILD_SOURCERY e6a110a2cd2ab9f2e426d0d0cb7b8d28e8b7d968ca86837adf90de186a6cf646_v0_11_1_21_gf35b55f #ifdef MDBX_CONFIG_H #include MDBX_CONFIG_H #endif #define LIBMDBX_INTERNALS #ifdef xMDBX_TOOLS #define MDBX_DEPRECATED #endif /* xMDBX_TOOLS */ #ifdef xMDBX_ALLOY /* Amalgamated build */ #define MDBX_INTERNAL_FUNC static #define MDBX_INTERNAL_VAR static #else /* Non-amalgamated build */ #define MDBX_INTERNAL_FUNC #define MDBX_INTERNAL_VAR extern #endif /* xMDBX_ALLOY */ /** Disables using GNU/Linux libc extensions. * \ingroup build_option * \note This option couldn't be moved to the options.h since dependant * control macros/defined should be prepared before include the options.h */ #ifndef MDBX_DISABLE_GNU_SOURCE #define MDBX_DISABLE_GNU_SOURCE 0 #endif #if MDBX_DISABLE_GNU_SOURCE #undef _GNU_SOURCE #elif (defined(__linux__) || defined(__gnu_linux__)) && !defined(_GNU_SOURCE) #define _GNU_SOURCE #endif /* MDBX_DISABLE_GNU_SOURCE */ /*----------------------------------------------------------------------------*/ /* Should be defined before any includes */ #ifndef _FILE_OFFSET_BITS #define _FILE_OFFSET_BITS 64 #endif #ifdef __APPLE__ #define _DARWIN_C_SOURCE #endif #ifdef _MSC_VER #if _MSC_FULL_VER < 190024234 /* Actually libmdbx was not tested with compilers older than 19.00.24234 (Visual * Studio 2015 Update 3). But you could remove this #error and try to continue * at your own risk. In such case please don't rise up an issues related ONLY to * old compilers. * * NOTE: * Unfortunately, there are several different builds of "Visual Studio" that * are called "Visual Studio 2015 Update 3". * * The 190024234 is used here because it is minimal version of Visual Studio * that was used for build and testing libmdbx in recent years. Soon this * value will be increased to 19.0.24241.7, since build and testing using * "Visual Studio 2015" will be performed only at https://ci.appveyor.com. * * Please ask Microsoft (but not us) for information about version differences * and how to and where you can obtain the latest "Visual Studio 2015" build * with all fixes. */ #error \ "At least \"Microsoft C/C++ Compiler\" version 19.00.24234 (Visual Studio 2015 Update 3) is required." #endif #ifndef _CRT_SECURE_NO_WARNINGS #define _CRT_SECURE_NO_WARNINGS #endif /* _CRT_SECURE_NO_WARNINGS */ #if _MSC_VER > 1800 #pragma warning(disable : 4464) /* relative include path contains '..' */ #endif #if _MSC_VER > 1913 #pragma warning(disable : 5045) /* Compiler will insert Spectre mitigation... \ */ #endif #pragma warning(disable : 4710) /* 'xyz': function not inlined */ #pragma warning(disable : 4711) /* function 'xyz' selected for automatic \ inline expansion */ #pragma warning( \ disable : 4201) /* nonstandard extension used : nameless struct / union */ #pragma warning(disable : 4702) /* unreachable code */ #pragma warning(disable : 4706) /* assignment within conditional expression */ #pragma warning(disable : 4127) /* conditional expression is constant */ #pragma warning(disable : 4324) /* 'xyz': structure was padded due to \ alignment specifier */ #pragma warning(disable : 4310) /* cast truncates constant value */ #pragma warning( \ disable : 4820) /* bytes padding added after data member for alignment */ #pragma warning(disable : 4548) /* expression before comma has no effect; \ expected expression with side - effect */ #pragma warning(disable : 4366) /* the result of the unary '&' operator may be \ unaligned */ #pragma warning(disable : 4200) /* nonstandard extension used: zero-sized \ array in struct/union */ #pragma warning(disable : 4204) /* nonstandard extension used: non-constant \ aggregate initializer */ #pragma warning( \ disable : 4505) /* unreferenced local function has been removed */ #endif /* _MSC_VER (warnings) */ #include "mdbx.h" /* * Copyright 2015-2021 Leonid Yuriev * and other libmdbx authors: please see AUTHORS file. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted only as authorized by the OpenLDAP * Public License. * * A copy of this license is available in the file LICENSE in the * top-level directory of the distribution or, alternatively, at * . */ /* *INDENT-OFF* */ /* clang-format off */ #ifndef __GNUC_PREREQ # if defined(__GNUC__) && defined(__GNUC_MINOR__) # define __GNUC_PREREQ(maj, min) \ ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) # else # define __GNUC_PREREQ(maj, min) (0) # endif #endif /* __GNUC_PREREQ */ #ifndef __CLANG_PREREQ # ifdef __clang__ # define __CLANG_PREREQ(maj,min) \ ((__clang_major__ << 16) + __clang_minor__ >= ((maj) << 16) + (min)) # else # define __CLANG_PREREQ(maj,min) (0) # endif #endif /* __CLANG_PREREQ */ #ifndef __GLIBC_PREREQ # if defined(__GLIBC__) && defined(__GLIBC_MINOR__) # define __GLIBC_PREREQ(maj, min) \ ((__GLIBC__ << 16) + __GLIBC_MINOR__ >= ((maj) << 16) + (min)) # else # define __GLIBC_PREREQ(maj, min) (0) # endif #endif /* __GLIBC_PREREQ */ #ifndef __has_warning # define __has_warning(x) (0) #endif #ifndef __has_include # define __has_include(x) (0) #endif #if __has_feature(thread_sanitizer) # define __SANITIZE_THREAD__ 1 #endif #if __has_feature(address_sanitizer) # define __SANITIZE_ADDRESS__ 1 #endif /*----------------------------------------------------------------------------*/ #ifndef __extern_C # ifdef __cplusplus # define __extern_C extern "C" # else # define __extern_C # endif #endif /* __extern_C */ #if !defined(nullptr) && !defined(__cplusplus) || (__cplusplus < 201103L && !defined(_MSC_VER)) # define nullptr NULL #endif /*----------------------------------------------------------------------------*/ #ifndef __always_inline # if defined(__GNUC__) || __has_attribute(__always_inline__) # define __always_inline __inline __attribute__((__always_inline__)) # elif defined(_MSC_VER) # define __always_inline __forceinline # else # define __always_inline # endif #endif /* __always_inline */ #ifndef __noinline # if defined(__GNUC__) || __has_attribute(__noinline__) # define __noinline __attribute__((__noinline__)) # elif defined(_MSC_VER) # define __noinline __declspec(noinline) # else # define __noinline # endif #endif /* __noinline */ #ifndef __must_check_result # if defined(__GNUC__) || __has_attribute(__warn_unused_result__) # define __must_check_result __attribute__((__warn_unused_result__)) # else # define __must_check_result # endif #endif /* __must_check_result */ #if !defined(__noop) && !defined(_MSC_VER) # define __noop(...) do {} while(0) #endif /* __noop */ #ifndef __fallthrough # if defined(__cplusplus) && (__has_cpp_attribute(fallthrough) && \ (!defined(__clang__) || __clang__ > 4)) || __cplusplus >= 201703L # define __fallthrough [[fallthrough]] # elif __GNUC_PREREQ(8, 0) && defined(__cplusplus) && __cplusplus >= 201103L # define __fallthrough [[fallthrough]] # elif __GNUC_PREREQ(7, 0) && \ (!defined(__LCC__) || (__LCC__ == 124 && __LCC_MINOR__ >= 12) || \ (__LCC__ == 125 && __LCC_MINOR__ >= 5) || (__LCC__ >= 126)) # define __fallthrough __attribute__((__fallthrough__)) # elif defined(__clang__) && defined(__cplusplus) && __cplusplus >= 201103L &&\ __has_feature(cxx_attributes) && __has_warning("-Wimplicit-fallthrough") # define __fallthrough [[clang::fallthrough]] # else # define __fallthrough # endif #endif /* __fallthrough */ #ifndef __unreachable # if __GNUC_PREREQ(4,5) || __has_builtin(__builtin_unreachable) # define __unreachable() __builtin_unreachable() # elif defined(_MSC_VER) # define __unreachable() __assume(0) # else # define __unreachable() __noop() # endif #endif /* __unreachable */ #ifndef __prefetch # if defined(__GNUC__) || defined(__clang__) || __has_builtin(__builtin_prefetch) # define __prefetch(ptr) __builtin_prefetch(ptr) # else # define __prefetch(ptr) __noop(ptr) # endif #endif /* __prefetch */ #ifndef __nothrow # if defined(__cplusplus) # if __cplusplus < 201703L # define __nothrow throw() # else # define __nothrow noexcept(true) # endif /* __cplusplus */ # elif defined(__GNUC__) || __has_attribute(__nothrow__) # define __nothrow __attribute__((__nothrow__)) # elif defined(_MSC_VER) && defined(__cplusplus) # define __nothrow __declspec(nothrow) # else # define __nothrow # endif #endif /* __nothrow */ #ifndef __hidden # if defined(__GNUC__) || __has_attribute(__visibility__) # define __hidden __attribute__((__visibility__("hidden"))) # else # define __hidden # endif #endif /* __hidden */ #ifndef __optimize # if defined(__OPTIMIZE__) # if (defined(__GNUC__) && !defined(__clang__)) || __has_attribute(__optimize__) # define __optimize(ops) __attribute__((__optimize__(ops))) # else # define __optimize(ops) # endif # else # define __optimize(ops) # endif #endif /* __optimize */ #ifndef __hot # if defined(__OPTIMIZE__) # if defined(__e2k__) # define __hot __attribute__((__hot__)) __optimize(3) # elif defined(__clang__) && !__has_attribute(__hot_) \ && __has_attribute(__section__) && (defined(__linux__) || defined(__gnu_linux__)) /* just put frequently used functions in separate section */ # define __hot __attribute__((__section__("text.hot"))) __optimize("O3") # elif defined(__GNUC__) || __has_attribute(__hot__) # define __hot __attribute__((__hot__)) __optimize("O3") # else # define __hot __optimize("O3") # endif # else # define __hot # endif #endif /* __hot */ #ifndef __cold # if defined(__OPTIMIZE__) # if defined(__e2k__) # define __cold __attribute__((__cold__)) __optimize(1) # elif defined(__clang__) && !__has_attribute(cold) \ && __has_attribute(__section__) && (defined(__linux__) || defined(__gnu_linux__)) /* just put infrequently used functions in separate section */ # define __cold __attribute__((__section__("text.unlikely"))) __optimize("Os") # elif defined(__GNUC__) || __has_attribute(cold) # define __cold __attribute__((__cold__)) __optimize("Os") # else # define __cold __optimize("Os") # endif # else # define __cold # endif #endif /* __cold */ #ifndef __flatten # if defined(__OPTIMIZE__) && (defined(__GNUC__) || __has_attribute(__flatten__)) # define __flatten __attribute__((__flatten__)) # else # define __flatten # endif #endif /* __flatten */ #ifndef likely # if (defined(__GNUC__) || __has_builtin(__builtin_expect)) && !defined(__COVERITY__) # define likely(cond) __builtin_expect(!!(cond), 1) # else # define likely(x) (!!(x)) # endif #endif /* likely */ #ifndef unlikely # if (defined(__GNUC__) || __has_builtin(__builtin_expect)) && !defined(__COVERITY__) # define unlikely(cond) __builtin_expect(!!(cond), 0) # else # define unlikely(x) (!!(x)) # endif #endif /* unlikely */ #ifndef __anonymous_struct_extension__ # if defined(__GNUC__) # define __anonymous_struct_extension__ __extension__ # else # define __anonymous_struct_extension__ # endif #endif /* __anonymous_struct_extension__ */ #ifndef __Wpedantic_format_voidptr MDBX_MAYBE_UNUSED MDBX_PURE_FUNCTION static __inline const void* __Wpedantic_format_voidptr(const void* ptr) {return ptr;} # define __Wpedantic_format_voidptr(ARG) __Wpedantic_format_voidptr(ARG) #endif /* __Wpedantic_format_voidptr */ /*----------------------------------------------------------------------------*/ #if defined(MDBX_USE_VALGRIND) # include # ifndef VALGRIND_DISABLE_ADDR_ERROR_REPORTING_IN_RANGE /* LY: available since Valgrind 3.10 */ # define VALGRIND_DISABLE_ADDR_ERROR_REPORTING_IN_RANGE(a,s) # define VALGRIND_ENABLE_ADDR_ERROR_REPORTING_IN_RANGE(a,s) # endif #elif !defined(RUNNING_ON_VALGRIND) # define VALGRIND_CREATE_MEMPOOL(h,r,z) # define VALGRIND_DESTROY_MEMPOOL(h) # define VALGRIND_MEMPOOL_TRIM(h,a,s) # define VALGRIND_MEMPOOL_ALLOC(h,a,s) # define VALGRIND_MEMPOOL_FREE(h,a) # define VALGRIND_MEMPOOL_CHANGE(h,a,b,s) # define VALGRIND_MAKE_MEM_NOACCESS(a,s) # define VALGRIND_MAKE_MEM_DEFINED(a,s) # define VALGRIND_MAKE_MEM_UNDEFINED(a,s) # define VALGRIND_DISABLE_ADDR_ERROR_REPORTING_IN_RANGE(a,s) # define VALGRIND_ENABLE_ADDR_ERROR_REPORTING_IN_RANGE(a,s) # define VALGRIND_CHECK_MEM_IS_ADDRESSABLE(a,s) (0) # define VALGRIND_CHECK_MEM_IS_DEFINED(a,s) (0) # define RUNNING_ON_VALGRIND (0) #endif /* MDBX_USE_VALGRIND */ #ifdef __SANITIZE_ADDRESS__ # include #elif !defined(ASAN_POISON_MEMORY_REGION) # define ASAN_POISON_MEMORY_REGION(addr, size) \ ((void)(addr), (void)(size)) # define ASAN_UNPOISON_MEMORY_REGION(addr, size) \ ((void)(addr), (void)(size)) #endif /* __SANITIZE_ADDRESS__ */ /*----------------------------------------------------------------------------*/ #ifndef ARRAY_LENGTH # ifdef __cplusplus template char (&__ArraySizeHelper(T (&array)[N]))[N]; # define ARRAY_LENGTH(array) (sizeof(::__ArraySizeHelper(array))) # else # define ARRAY_LENGTH(array) (sizeof(array) / sizeof(array[0])) # endif #endif /* ARRAY_LENGTH */ #ifndef ARRAY_END # define ARRAY_END(array) (&array[ARRAY_LENGTH(array)]) #endif /* ARRAY_END */ #define CONCAT(a,b) a##b #define XCONCAT(a,b) CONCAT(a,b) #ifndef offsetof # define offsetof(type, member) __builtin_offsetof(type, member) #endif /* offsetof */ #ifndef container_of # define container_of(ptr, type, member) \ ((type *)((char *)(ptr) - offsetof(type, member))) #endif /* container_of */ #define MDBX_TETRAD(a, b, c, d) \ ((uint32_t)(a) << 24 | (uint32_t)(b) << 16 | (uint32_t)(c) << 8 | (d)) #define MDBX_STRING_TETRAD(str) MDBX_TETRAD(str[0], str[1], str[2], str[3]) #define FIXME "FIXME: " __FILE__ ", " MDBX_STRINGIFY(__LINE__) #ifndef STATIC_ASSERT_MSG # if defined(static_assert) # define STATIC_ASSERT_MSG(expr, msg) static_assert(expr, msg) # elif defined(_STATIC_ASSERT) # define STATIC_ASSERT_MSG(expr, msg) _STATIC_ASSERT(expr) # elif defined(_MSC_VER) # include # define STATIC_ASSERT_MSG(expr, msg) _STATIC_ASSERT(expr) # elif (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L) \ || __has_feature(c_static_assert) # define STATIC_ASSERT_MSG(expr, msg) _Static_assert(expr, msg) # else # define STATIC_ASSERT_MSG(expr, msg) switch (0) {case 0:case (expr):;} # endif #endif /* STATIC_ASSERT */ #ifndef STATIC_ASSERT # define STATIC_ASSERT(expr) STATIC_ASSERT_MSG(expr, #expr) #endif /* *INDENT-ON* */ /* clang-format on */ #if defined(__GNUC__) && !__GNUC_PREREQ(4, 2) /* Actually libmdbx was not tested with compilers older than GCC 4.2. * But you could ignore this warning at your own risk. * In such case please don't rise up an issues related ONLY to old compilers. */ #warning "libmdbx required GCC >= 4.2" #endif #if defined(__clang__) && !__CLANG_PREREQ(3, 8) /* Actually libmdbx was not tested with CLANG older than 3.8. * But you could ignore this warning at your own risk. * In such case please don't rise up an issues related ONLY to old compilers. */ #warning "libmdbx required CLANG >= 3.8" #endif #if defined(__GLIBC__) && !__GLIBC_PREREQ(2, 12) /* Actually libmdbx was not tested with something older than glibc 2.12. * But you could ignore this warning at your own risk. * In such case please don't rise up an issues related ONLY to old systems. */ #warning "libmdbx was only tested with GLIBC >= 2.12." #endif #ifdef __SANITIZE_THREAD__ #warning \ "libmdbx don't compatible with ThreadSanitizer, you will get a lot of false-positive issues." #endif /* __SANITIZE_THREAD__ */ #if __has_warning("-Wnested-anon-types") #if defined(__clang__) #pragma clang diagnostic ignored "-Wnested-anon-types" #elif defined(__GNUC__) #pragma GCC diagnostic ignored "-Wnested-anon-types" #else #pragma warning disable "nested-anon-types" #endif #endif /* -Wnested-anon-types */ #if __has_warning("-Wconstant-logical-operand") #if defined(__clang__) #pragma clang diagnostic ignored "-Wconstant-logical-operand" #elif defined(__GNUC__) #pragma GCC diagnostic ignored "-Wconstant-logical-operand" #else #pragma warning disable "constant-logical-operand" #endif #endif /* -Wconstant-logical-operand */ #if defined(__LCC__) && (__LCC__ <= 121) /* bug #2798 */ #pragma diag_suppress alignment_reduction_ignored #elif defined(__ICC) #pragma warning(disable : 3453 1366) #elif __has_warning("-Walignment-reduction-ignored") #if defined(__clang__) #pragma clang diagnostic ignored "-Walignment-reduction-ignored" #elif defined(__GNUC__) #pragma GCC diagnostic ignored "-Walignment-reduction-ignored" #else #pragma warning disable "alignment-reduction-ignored" #endif #endif /* -Walignment-reduction-ignored */ #ifdef __cplusplus extern "C" { #endif /* https://en.wikipedia.org/wiki/Operating_system_abstraction_layer */ /* * Copyright 2015-2021 Leonid Yuriev * and other libmdbx authors: please see AUTHORS file. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted only as authorized by the OpenLDAP * Public License. * * A copy of this license is available in the file LICENSE in the * top-level directory of the distribution or, alternatively, at * . */ /*----------------------------------------------------------------------------*/ /* Microsoft compiler generates a lot of warning for self includes... */ #ifdef _MSC_VER #pragma warning(push, 1) #pragma warning(disable : 4548) /* expression before comma has no effect; \ expected expression with side - effect */ #pragma warning(disable : 4530) /* C++ exception handler used, but unwind \ * semantics are not enabled. Specify /EHsc */ #pragma warning(disable : 4577) /* 'noexcept' used with no exception handling \ * mode specified; termination on exception is \ * not guaranteed. Specify /EHsc */ #endif /* _MSC_VER (warnings) */ #if defined(_WIN32) || defined(_WIN64) #if !defined(_CRT_SECURE_NO_WARNINGS) #define _CRT_SECURE_NO_WARNINGS #endif /* _CRT_SECURE_NO_WARNINGS */ #if !defined(_NO_CRT_STDIO_INLINE) && MDBX_BUILD_SHARED_LIBRARY && \ !defined(xMDBX_TOOLS) && MDBX_WITHOUT_MSVC_CRT #define _NO_CRT_STDIO_INLINE #endif #elif !defined(_POSIX_C_SOURCE) #define _POSIX_C_SOURCE 200809L #endif /* Windows */ /*----------------------------------------------------------------------------*/ /* C99 includes */ #include #include #include #include #include #include #include #include #include #include /* C11 stdalign.h */ #if __has_include() #include #elif defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L #define alignas(N) _Alignas(N) #elif defined(_MSC_VER) #define alignas(N) __declspec(align(N)) #elif __has_attribute(__aligned__) || defined(__GNUC__) #define alignas(N) __attribute__((__aligned__(N))) #else #error "FIXME: Required _alignas() or equivalent." #endif /*----------------------------------------------------------------------------*/ /* Systems includes */ #ifdef __APPLE__ #include #endif /* Apple OSX & iOS */ #if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || \ defined(__BSD__) || defined(__bsdi__) || defined(__DragonFly__) || \ defined(__APPLE__) || defined(__MACH__) #include #include #include #include #if defined(__FreeBSD__) || defined(__DragonFly__) #include #elif defined(__OpenBSD__) || defined(__NetBSD__) #include #else #define SYSCTL_LEGACY_NONCONST_MIB #endif #ifndef __MACH__ #include #endif #else #include #if !(defined(__sun) || defined(__SVR4) || defined(__svr4__) || \ defined(_WIN32) || defined(_WIN64)) #include #endif /* !Solaris */ #endif /* !xBSD */ #if defined(__FreeBSD__) || __has_include() #include #endif #if defined(__APPLE__) || defined(__MACH__) || __has_include() #include #endif /* MacOS */ #if defined(__MACH__) #include #include #include #include #undef P_DIRTY #endif #if defined(__linux__) || defined(__gnu_linux__) #include #include #include #include #endif /* Linux */ #ifndef _XOPEN_SOURCE #define _XOPEN_SOURCE 0 #endif #ifndef _XOPEN_SOURCE_EXTENDED #define _XOPEN_SOURCE_EXTENDED 0 #else #include #endif /* _XOPEN_SOURCE_EXTENDED */ #if defined(__sun) || defined(__SVR4) || defined(__svr4__) #include #include /* On Solaris, it's easier to add a missing prototype rather than find a * combination of #defines that break nothing. */ __extern_C key_t ftok(const char *, int); #endif /* SunOS/Solaris */ #if defined(_WIN32) || defined(_WIN64) #ifndef _WIN32_WINNT #define _WIN32_WINNT 0x0601 /* Windows 7 */ #elif _WIN32_WINNT < 0x0500 #error At least 'Windows 2000' API is required for libmdbx. #endif /* _WIN32_WINNT */ #if (defined(__MINGW32__) || defined(__MINGW64__)) && \ !defined(__USE_MINGW_ANSI_STDIO) #define __USE_MINGW_ANSI_STDIO 1 #endif /* MinGW */ #ifndef WIN32_LEAN_AND_MEAN #define WIN32_LEAN_AND_MEAN #endif /* WIN32_LEAN_AND_MEAN */ #include #include #include #include #include #define HAVE_SYS_STAT_H #define HAVE_SYS_TYPES_H typedef HANDLE mdbx_thread_t; typedef unsigned mdbx_thread_key_t; #define MAP_FAILED NULL #define HIGH_DWORD(v) ((DWORD)((sizeof(v) > 4) ? ((uint64_t)(v) >> 32) : 0)) #define THREAD_CALL WINAPI #define THREAD_RESULT DWORD typedef struct { HANDLE mutex; HANDLE event[2]; } mdbx_condpair_t; typedef CRITICAL_SECTION mdbx_fastmutex_t; #if !defined(_MSC_VER) && !defined(__try) /* *INDENT-OFF* */ /* clang-format off */ #define __try #define __except(COND) if(false) /* *INDENT-ON* */ /* clang-format on */ #endif /* stub for MSVC's __try/__except */ #if MDBX_WITHOUT_MSVC_CRT #ifndef mdbx_malloc static inline void *mdbx_malloc(size_t bytes) { return HeapAlloc(GetProcessHeap(), 0, bytes); } #endif /* mdbx_malloc */ #ifndef mdbx_calloc static inline void *mdbx_calloc(size_t nelem, size_t size) { return HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, nelem * size); } #endif /* mdbx_calloc */ #ifndef mdbx_realloc static inline void *mdbx_realloc(void *ptr, size_t bytes) { return ptr ? HeapReAlloc(GetProcessHeap(), 0, ptr, bytes) : HeapAlloc(GetProcessHeap(), 0, bytes); } #endif /* mdbx_realloc */ #ifndef mdbx_free static inline void mdbx_free(void *ptr) { HeapFree(GetProcessHeap(), 0, ptr); } #endif /* mdbx_free */ #else /* MDBX_WITHOUT_MSVC_CRT */ #define mdbx_malloc malloc #define mdbx_calloc calloc #define mdbx_realloc realloc #define mdbx_free free #define mdbx_strdup _strdup #endif /* MDBX_WITHOUT_MSVC_CRT */ #ifndef snprintf #define snprintf _snprintf /* ntdll */ #endif #ifndef vsnprintf #define vsnprintf _vsnprintf /* ntdll */ #endif #else /*----------------------------------------------------------------------*/ #include #if !defined(_POSIX_MAPPED_FILES) || _POSIX_MAPPED_FILES < 1 #error "libmdbx requires the _POSIX_MAPPED_FILES feature" #endif /* _POSIX_MAPPED_FILES */ #include #include #include #include #include #include #include #include #include #include typedef pthread_t mdbx_thread_t; typedef pthread_key_t mdbx_thread_key_t; #define INVALID_HANDLE_VALUE (-1) #define THREAD_CALL #define THREAD_RESULT void * typedef struct { pthread_mutex_t mutex; pthread_cond_t cond[2]; } mdbx_condpair_t; typedef pthread_mutex_t mdbx_fastmutex_t; #define mdbx_malloc malloc #define mdbx_calloc calloc #define mdbx_realloc realloc #define mdbx_free free #define mdbx_strdup strdup #endif /* Platform */ #if __GLIBC_PREREQ(2, 12) || defined(__FreeBSD__) || defined(malloc_usable_size) /* malloc_usable_size() already provided */ #elif defined(__APPLE__) #define malloc_usable_size(ptr) malloc_size(ptr) #elif defined(_MSC_VER) && !MDBX_WITHOUT_MSVC_CRT #define malloc_usable_size(ptr) _msize(ptr) #endif /* malloc_usable_size */ #ifdef __ANDROID_API__ #include #if __ANDROID_API__ >= 21 #include #endif #endif /* Android */ /* *INDENT-OFF* */ /* clang-format off */ #if defined(HAVE_SYS_STAT_H) || __has_include() #include #endif #if defined(HAVE_SYS_TYPES_H) || __has_include() #include #endif #if defined(HAVE_SYS_FILE_H) || __has_include() #include #endif /* *INDENT-ON* */ /* clang-format on */ #ifndef SSIZE_MAX #define SSIZE_MAX INTPTR_MAX #endif #if !defined(MADV_DODUMP) && defined(MADV_CORE) #define MADV_DODUMP MADV_CORE #endif /* MADV_CORE -> MADV_DODUMP */ #if !defined(MADV_DONTDUMP) && defined(MADV_NOCORE) #define MADV_DONTDUMP MADV_NOCORE #endif /* MADV_NOCORE -> MADV_DONTDUMP */ #if defined(i386) || defined(__386) || defined(__i386) || defined(__i386__) || \ defined(i486) || defined(__i486) || defined(__i486__) || \ defined(i586) | defined(__i586) || defined(__i586__) || defined(i686) || \ defined(__i686) || defined(__i686__) || defined(_M_IX86) || \ defined(_X86_) || defined(__THW_INTEL__) || defined(__I86__) || \ defined(__INTEL__) || defined(__x86_64) || defined(__x86_64__) || \ defined(__amd64__) || defined(__amd64) || defined(_M_X64) || \ defined(_M_AMD64) || defined(__IA32__) || defined(__INTEL__) #ifndef __ia32__ /* LY: define neutral __ia32__ for x86 and x86-64 */ #define __ia32__ 1 #endif /* __ia32__ */ #if !defined(__amd64__) && (defined(__x86_64) || defined(__x86_64__) || \ defined(__amd64) || defined(_M_X64)) /* LY: define trusty __amd64__ for all AMD64/x86-64 arch */ #define __amd64__ 1 #endif /* __amd64__ */ #endif /* all x86 */ #if (-6 & 5) || CHAR_BIT != 8 || UINT_MAX < 0xffffffff || ULONG_MAX % 0xFFFF #error \ "Sanity checking failed: Two's complement, reasonably sized integer types" #endif #if UINTPTR_MAX > 0xffffFFFFul || ULONG_MAX > 0xffffFFFFul #define MDBX_WORDBITS 64 #else #define MDBX_WORDBITS 32 #endif /* MDBX_WORDBITS */ /*----------------------------------------------------------------------------*/ /* Compiler's includes for builtins/intrinsics */ #if defined(_MSC_VER) || defined(__INTEL_COMPILER) #include #elif __GNUC_PREREQ(4, 4) || defined(__clang__) #if defined(__ia32__) || defined(__e2k__) #include #endif /* __ia32__ */ #if defined(__ia32__) #include #endif /* __ia32__ */ #elif defined(__SUNPRO_C) || defined(__sun) || defined(sun) #include #elif (defined(_HPUX_SOURCE) || defined(__hpux) || defined(__HP_aCC)) && \ (defined(HP_IA64) || defined(__ia64)) #include #elif defined(__IBMC__) && defined(__powerpc) #include #elif defined(_AIX) #include #include #elif (defined(__osf__) && defined(__DECC)) || defined(__alpha) #include #include #elif defined(__MWERKS__) /* CodeWarrior - troubles ? */ #pragma gcc_extensions #elif defined(__SNC__) /* Sony PS3 - troubles ? */ #elif defined(__hppa__) || defined(__hppa) #include #else #error Unsupported C compiler, please use GNU C 4.4 or newer #endif /* Compiler */ /*----------------------------------------------------------------------------*/ /* Byteorder */ #if !defined(__BYTE_ORDER__) || !defined(__ORDER_LITTLE_ENDIAN__) || \ !defined(__ORDER_BIG_ENDIAN__) /* *INDENT-OFF* */ /* clang-format off */ #if defined(__GLIBC__) || defined(__GNU_LIBRARY__) || defined(__ANDROID_API__) || \ defined(HAVE_ENDIAN_H) || __has_include() #include #elif defined(__APPLE__) || defined(__MACH__) || defined(__OpenBSD__) || \ defined(HAVE_MACHINE_ENDIAN_H) || __has_include() #include #elif defined(HAVE_SYS_ISA_DEFS_H) || __has_include() #include #elif (defined(HAVE_SYS_TYPES_H) && defined(HAVE_SYS_ENDIAN_H)) || \ (__has_include() && __has_include()) #include #include #elif defined(__bsdi__) || defined(__DragonFly__) || defined(__FreeBSD__) || \ defined(__NetBSD__) || \ defined(HAVE_SYS_PARAM_H) || __has_include() #include #endif /* OS */ /* *INDENT-ON* */ /* clang-format on */ #if defined(__BYTE_ORDER) && defined(__LITTLE_ENDIAN) && defined(__BIG_ENDIAN) #define __ORDER_LITTLE_ENDIAN__ __LITTLE_ENDIAN #define __ORDER_BIG_ENDIAN__ __BIG_ENDIAN #define __BYTE_ORDER__ __BYTE_ORDER #elif defined(_BYTE_ORDER) && defined(_LITTLE_ENDIAN) && defined(_BIG_ENDIAN) #define __ORDER_LITTLE_ENDIAN__ _LITTLE_ENDIAN #define __ORDER_BIG_ENDIAN__ _BIG_ENDIAN #define __BYTE_ORDER__ _BYTE_ORDER #else #define __ORDER_LITTLE_ENDIAN__ 1234 #define __ORDER_BIG_ENDIAN__ 4321 #if defined(__LITTLE_ENDIAN__) || \ (defined(_LITTLE_ENDIAN) && !defined(_BIG_ENDIAN)) || \ defined(__ARMEL__) || defined(__THUMBEL__) || defined(__AARCH64EL__) || \ defined(__MIPSEL__) || defined(_MIPSEL) || defined(__MIPSEL) || \ defined(_M_ARM) || defined(_M_ARM64) || defined(__e2k__) || \ defined(__elbrus_4c__) || defined(__elbrus_8c__) || defined(__bfin__) || \ defined(__BFIN__) || defined(__ia64__) || defined(_IA64) || \ defined(__IA64__) || defined(__ia64) || defined(_M_IA64) || \ defined(__itanium__) || defined(__ia32__) || defined(__CYGWIN__) || \ defined(_WIN64) || defined(_WIN32) || defined(__TOS_WIN__) || \ defined(__WINDOWS__) #define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__ #elif defined(__BIG_ENDIAN__) || \ (defined(_BIG_ENDIAN) && !defined(_LITTLE_ENDIAN)) || \ defined(__ARMEB__) || defined(__THUMBEB__) || defined(__AARCH64EB__) || \ defined(__MIPSEB__) || defined(_MIPSEB) || defined(__MIPSEB) || \ defined(__m68k__) || defined(M68000) || defined(__hppa__) || \ defined(__hppa) || defined(__HPPA__) || defined(__sparc__) || \ defined(__sparc) || defined(__370__) || defined(__THW_370__) || \ defined(__s390__) || defined(__s390x__) || defined(__SYSC_ZARCH__) #define __BYTE_ORDER__ __ORDER_BIG_ENDIAN__ #else #error __BYTE_ORDER__ should be defined. #endif /* Arch */ #endif #endif /* __BYTE_ORDER__ || __ORDER_LITTLE_ENDIAN__ || __ORDER_BIG_ENDIAN__ */ /* Get the size of a memory page for the system. * This is the basic size that the platform's memory manager uses, and is * fundamental to the use of memory-mapped files. */ MDBX_MAYBE_UNUSED MDBX_NOTHROW_CONST_FUNCTION static __inline size_t mdbx_syspagesize(void) { #if defined(_WIN32) || defined(_WIN64) SYSTEM_INFO si; GetSystemInfo(&si); return si.dwPageSize; #else return sysconf(_SC_PAGE_SIZE); #endif } typedef struct mdbx_mmap_param { union { void *address; uint8_t *dxb; struct MDBX_lockinfo *lck; }; mdbx_filehandle_t fd; size_t limit; /* mapping length, but NOT a size of file nor DB */ size_t current; /* mapped region size, i.e. the size of file and DB */ uint64_t filesize /* in-process cache of a file size */; #if defined(_WIN32) || defined(_WIN64) HANDLE section; /* memory-mapped section handle */ #endif } mdbx_mmap_t; typedef union bin128 { __anonymous_struct_extension__ struct { uint64_t x, y; }; __anonymous_struct_extension__ struct { uint32_t a, b, c, d; }; } bin128_t; #if defined(_WIN32) || defined(_WIN64) typedef union MDBX_srwlock { struct { long volatile readerCount; long volatile writerCount; }; RTL_SRWLOCK native; } MDBX_srwlock; #endif /* Windows */ #ifndef __cplusplus MDBX_MAYBE_UNUSED MDBX_INTERNAL_FUNC void mdbx_osal_jitter(bool tiny); MDBX_MAYBE_UNUSED static __inline void mdbx_jitter4testing(bool tiny); /*----------------------------------------------------------------------------*/ /* Atomics */ #if defined(__cplusplus) && !defined(__STDC_NO_ATOMICS__) && (__has_include() || __has_extension(cxx_atomic)) #include #define MDBX_HAVE_C11ATOMICS #elif !defined(__cplusplus) && \ (__STDC_VERSION__ >= 201112L || __has_extension(c_atomic)) && \ !defined(__STDC_NO_ATOMICS__) && \ (__GNUC_PREREQ(4, 9) || __CLANG_PREREQ(3, 8) || \ !(defined(__GNUC__) || defined(__clang__))) #include #define MDBX_HAVE_C11ATOMICS #elif defined(__GNUC__) || defined(__clang__) #elif defined(_MSC_VER) #pragma warning(disable : 4163) /* 'xyz': not available as an intrinsic */ #pragma warning(disable : 4133) /* 'function': incompatible types - from \ 'size_t' to 'LONGLONG' */ #pragma warning(disable : 4244) /* 'return': conversion from 'LONGLONG' to \ 'std::size_t', possible loss of data */ #pragma warning(disable : 4267) /* 'function': conversion from 'size_t' to \ 'long', possible loss of data */ #pragma intrinsic(_InterlockedExchangeAdd, _InterlockedCompareExchange) #pragma intrinsic(_InterlockedExchangeAdd64, _InterlockedCompareExchange64) #elif defined(__APPLE__) #include #else #error FIXME atomic-ops #endif /*----------------------------------------------------------------------------*/ /* Memory/Compiler barriers, cache coherence */ #if __has_include() #include #elif defined(__mips) || defined(__mips__) || defined(__mips64) || \ defined(__mips64__) || defined(_M_MRX000) || defined(_MIPS_) || \ defined(__MWERKS__) || defined(__sgi) /* MIPS should have explicit cache control */ #include #endif MDBX_MAYBE_UNUSED static __inline void mdbx_compiler_barrier(void) { #if defined(__clang__) || defined(__GNUC__) __asm__ __volatile__("" ::: "memory"); #elif defined(_MSC_VER) _ReadWriteBarrier(); #elif defined(__INTEL_COMPILER) /* LY: Intel Compiler may mimic GCC and MSC */ __memory_barrier(); #elif defined(__SUNPRO_C) || defined(__sun) || defined(sun) __compiler_barrier(); #elif (defined(_HPUX_SOURCE) || defined(__hpux) || defined(__HP_aCC)) && \ (defined(HP_IA64) || defined(__ia64)) _Asm_sched_fence(/* LY: no-arg meaning 'all expect ALU', e.g. 0x3D3D */); #elif defined(_AIX) || defined(__ppc__) || defined(__powerpc__) || \ defined(__ppc64__) || defined(__powerpc64__) __fence(); #else #error "Could not guess the kind of compiler, please report to us." #endif } MDBX_MAYBE_UNUSED static __inline void mdbx_memory_barrier(void) { #ifdef MDBX_HAVE_C11ATOMICS atomic_thread_fence(memory_order_seq_cst); #elif defined(__ATOMIC_SEQ_CST) #ifdef __clang__ __c11_atomic_thread_fence(__ATOMIC_SEQ_CST); #else __atomic_thread_fence(__ATOMIC_SEQ_CST); #endif #elif defined(__clang__) || defined(__GNUC__) __sync_synchronize(); #elif defined(_WIN32) || defined(_WIN64) MemoryBarrier(); #elif defined(__INTEL_COMPILER) /* LY: Intel Compiler may mimic GCC and MSC */ #if defined(__ia32__) _mm_mfence(); #else __mf(); #endif #elif defined(__SUNPRO_C) || defined(__sun) || defined(sun) __machine_rw_barrier(); #elif (defined(_HPUX_SOURCE) || defined(__hpux) || defined(__HP_aCC)) && \ (defined(HP_IA64) || defined(__ia64)) _Asm_mf(); #elif defined(_AIX) || defined(__ppc__) || defined(__powerpc__) || \ defined(__ppc64__) || defined(__powerpc64__) __lwsync(); #else #error "Could not guess the kind of compiler, please report to us." #endif } /*----------------------------------------------------------------------------*/ /* libc compatibility stuff */ #if (!defined(__GLIBC__) && __GLIBC_PREREQ(2, 1)) && \ (defined(_GNU_SOURCE) || defined(_BSD_SOURCE)) #define mdbx_asprintf asprintf #define mdbx_vasprintf vasprintf #else MDBX_MAYBE_UNUSED MDBX_INTERNAL_FUNC MDBX_PRINTF_ARGS(2, 3) int mdbx_asprintf(char **strp, const char *fmt, ...); MDBX_INTERNAL_FUNC int mdbx_vasprintf(char **strp, const char *fmt, va_list ap); #endif /*----------------------------------------------------------------------------*/ /* OS abstraction layer stuff */ /* max bytes to write in one call */ #if defined(_WIN32) || defined(_WIN64) #define MAX_WRITE UINT32_C(0x01000000) #else #define MAX_WRITE UINT32_C(0x3fff0000) #endif #if defined(__linux__) || defined(__gnu_linux__) MDBX_INTERNAL_VAR uint32_t mdbx_linux_kernel_version; MDBX_INTERNAL_VAR bool mdbx_RunningOnWSL1 /* Windows Subsystem 1 for Linux */; #endif /* Linux */ #ifndef mdbx_strdup LIBMDBX_API char *mdbx_strdup(const char *str); #endif MDBX_MAYBE_UNUSED static __inline int mdbx_get_errno(void) { #if defined(_WIN32) || defined(_WIN64) DWORD rc = GetLastError(); #else int rc = errno; #endif return rc; } #ifndef mdbx_memalign_alloc MDBX_INTERNAL_FUNC int mdbx_memalign_alloc(size_t alignment, size_t bytes, void **result); #endif #ifndef mdbx_memalign_free MDBX_INTERNAL_FUNC void mdbx_memalign_free(void *ptr); #endif MDBX_INTERNAL_FUNC int mdbx_condpair_init(mdbx_condpair_t *condpair); MDBX_INTERNAL_FUNC int mdbx_condpair_lock(mdbx_condpair_t *condpair); MDBX_INTERNAL_FUNC int mdbx_condpair_unlock(mdbx_condpair_t *condpair); MDBX_INTERNAL_FUNC int mdbx_condpair_signal(mdbx_condpair_t *condpair, bool part); MDBX_INTERNAL_FUNC int mdbx_condpair_wait(mdbx_condpair_t *condpair, bool part); MDBX_INTERNAL_FUNC int mdbx_condpair_destroy(mdbx_condpair_t *condpair); MDBX_INTERNAL_FUNC int mdbx_fastmutex_init(mdbx_fastmutex_t *fastmutex); MDBX_INTERNAL_FUNC int mdbx_fastmutex_acquire(mdbx_fastmutex_t *fastmutex); MDBX_INTERNAL_FUNC int mdbx_fastmutex_release(mdbx_fastmutex_t *fastmutex); MDBX_INTERNAL_FUNC int mdbx_fastmutex_destroy(mdbx_fastmutex_t *fastmutex); MDBX_INTERNAL_FUNC int mdbx_pwritev(mdbx_filehandle_t fd, struct iovec *iov, int iovcnt, uint64_t offset, size_t expected_written); MDBX_INTERNAL_FUNC int mdbx_pread(mdbx_filehandle_t fd, void *buf, size_t count, uint64_t offset); MDBX_INTERNAL_FUNC int mdbx_pwrite(mdbx_filehandle_t fd, const void *buf, size_t count, uint64_t offset); MDBX_INTERNAL_FUNC int mdbx_write(mdbx_filehandle_t fd, const void *buf, size_t count); MDBX_INTERNAL_FUNC int mdbx_thread_create(mdbx_thread_t *thread, THREAD_RESULT(THREAD_CALL *start_routine)(void *), void *arg); MDBX_INTERNAL_FUNC int mdbx_thread_join(mdbx_thread_t thread); enum mdbx_syncmode_bits { MDBX_SYNC_NONE = 0, MDBX_SYNC_DATA = 1, MDBX_SYNC_SIZE = 2, MDBX_SYNC_IODQ = 4 }; MDBX_INTERNAL_FUNC int mdbx_fsync(mdbx_filehandle_t fd, const enum mdbx_syncmode_bits mode_bits); MDBX_INTERNAL_FUNC int mdbx_ftruncate(mdbx_filehandle_t fd, uint64_t length); MDBX_INTERNAL_FUNC int mdbx_fseek(mdbx_filehandle_t fd, uint64_t pos); MDBX_INTERNAL_FUNC int mdbx_filesize(mdbx_filehandle_t fd, uint64_t *length); enum mdbx_openfile_purpose { MDBX_OPEN_DXB_READ = 0, MDBX_OPEN_DXB_LAZY = 1, MDBX_OPEN_DXB_DSYNC = 2, MDBX_OPEN_LCK = 3, MDBX_OPEN_COPY = 4, MDBX_OPEN_DELETE = 5 }; MDBX_INTERNAL_FUNC int mdbx_openfile(const enum mdbx_openfile_purpose purpose, const MDBX_env *env, const char *pathname, mdbx_filehandle_t *fd, mdbx_mode_t unix_mode_bits); MDBX_INTERNAL_FUNC int mdbx_closefile(mdbx_filehandle_t fd); MDBX_INTERNAL_FUNC int mdbx_removefile(const char *pathname); MDBX_INTERNAL_FUNC int mdbx_removedirectory(const char *pathname); MDBX_INTERNAL_FUNC int mdbx_is_pipe(mdbx_filehandle_t fd); MDBX_INTERNAL_FUNC int mdbx_lockfile(mdbx_filehandle_t fd, bool wait); #define MMAP_OPTION_TRUNCATE 1 #define MMAP_OPTION_SEMAPHORE 2 MDBX_INTERNAL_FUNC int mdbx_mmap(const int flags, mdbx_mmap_t *map, const size_t must, const size_t limit, const unsigned options); MDBX_INTERNAL_FUNC int mdbx_munmap(mdbx_mmap_t *map); #define MDBX_MRESIZE_MAY_MOVE 0x00000100 #define MDBX_MRESIZE_MAY_UNMAP 0x00000200 MDBX_INTERNAL_FUNC int mdbx_mresize(const int flags, mdbx_mmap_t *map, size_t size, size_t limit); #if defined(_WIN32) || defined(_WIN64) typedef struct { unsigned limit, count; HANDLE handles[31]; } mdbx_handle_array_t; MDBX_INTERNAL_FUNC int mdbx_suspend_threads_before_remap(MDBX_env *env, mdbx_handle_array_t **array); MDBX_INTERNAL_FUNC int mdbx_resume_threads_after_remap(mdbx_handle_array_t *array); #endif /* Windows */ MDBX_INTERNAL_FUNC int mdbx_msync(mdbx_mmap_t *map, size_t offset, size_t length, enum mdbx_syncmode_bits mode_bits); MDBX_INTERNAL_FUNC int mdbx_check_fs_rdonly(mdbx_filehandle_t handle, const char *pathname, int err); MDBX_MAYBE_UNUSED static __inline uint32_t mdbx_getpid(void) { STATIC_ASSERT(sizeof(mdbx_pid_t) <= sizeof(uint32_t)); #if defined(_WIN32) || defined(_WIN64) return GetCurrentProcessId(); #else return getpid(); #endif } MDBX_MAYBE_UNUSED static __inline uintptr_t mdbx_thread_self(void) { mdbx_tid_t thunk; STATIC_ASSERT(sizeof(uintptr_t) >= sizeof(thunk)); #if defined(_WIN32) || defined(_WIN64) thunk = GetCurrentThreadId(); #else thunk = pthread_self(); #endif return (uintptr_t)thunk; } MDBX_INTERNAL_FUNC uint64_t mdbx_osal_monotime(void); MDBX_INTERNAL_FUNC uint64_t mdbx_osal_16dot16_to_monotime(uint32_t seconds_16dot16); MDBX_INTERNAL_FUNC uint32_t mdbx_osal_monotime_to_16dot16(uint64_t monotime); MDBX_INTERNAL_FUNC bin128_t mdbx_osal_bootid(void); /*----------------------------------------------------------------------------*/ /* lck stuff */ /// \brief Initialization of synchronization primitives linked with MDBX_env /// instance both in LCK-file and within the current process. /// \param /// global_uniqueness_flag = true - denotes that there are no other processes /// working with DB and LCK-file. Thus the function MUST initialize /// shared synchronization objects in memory-mapped LCK-file. /// global_uniqueness_flag = false - denotes that at least one process is /// already working with DB and LCK-file, including the case when DB /// has already been opened in the current process. Thus the function /// MUST NOT initialize shared synchronization objects in memory-mapped /// LCK-file that are already in use. /// \return Error code or zero on success. MDBX_INTERNAL_FUNC int mdbx_lck_init(MDBX_env *env, MDBX_env *inprocess_neighbor, int global_uniqueness_flag); /// \brief Disconnects from shared interprocess objects and destructs /// synchronization objects linked with MDBX_env instance /// within the current process. /// \param /// inprocess_neighbor = NULL - if the current process does not have other /// instances of MDBX_env linked with the DB being closed. /// Thus the function MUST check for other processes working with DB or /// LCK-file, and keep or destroy shared synchronization objects in /// memory-mapped LCK-file depending on the result. /// inprocess_neighbor = not-NULL - pointer to another instance of MDBX_env /// (anyone of there is several) working with DB or LCK-file within the /// current process. Thus the function MUST NOT try to acquire exclusive /// lock and/or try to destruct shared synchronization objects linked with /// DB or LCK-file. Moreover, the implementation MUST ensure correct work /// of other instances of MDBX_env within the current process, e.g. /// restore POSIX-fcntl locks after the closing of file descriptors. /// \return Error code (MDBX_PANIC) or zero on success. MDBX_INTERNAL_FUNC int mdbx_lck_destroy(MDBX_env *env, MDBX_env *inprocess_neighbor); /// \brief Connects to shared interprocess locking objects and tries to acquire /// the maximum lock level (shared if exclusive is not available) /// Depending on implementation or/and platform (Windows) this function may /// acquire the non-OS super-level lock (e.g. for shared synchronization /// objects initialization), which will be downgraded to OS-exclusive or /// shared via explicit calling of mdbx_lck_downgrade(). /// \return /// MDBX_RESULT_TRUE (-1) - if an exclusive lock was acquired and thus /// the current process is the first and only after the last use of DB. /// MDBX_RESULT_FALSE (0) - if a shared lock was acquired and thus /// DB has already been opened and now is used by other processes. /// Otherwise (not 0 and not -1) - error code. MDBX_INTERNAL_FUNC int mdbx_lck_seize(MDBX_env *env); /// \brief Downgrades the level of initially acquired lock to /// operational level specified by argument. The reson for such downgrade: /// - unblocking of other processes that are waiting for access, i.e. /// if (env->me_flags & MDBX_EXCLUSIVE) != 0, then other processes /// should be made aware that access is unavailable rather than /// wait for it. /// - freeing locks that interfere file operation (especially for Windows) /// (env->me_flags & MDBX_EXCLUSIVE) == 0 - downgrade to shared lock. /// (env->me_flags & MDBX_EXCLUSIVE) != 0 - downgrade to exclusive /// operational lock. /// \return Error code or zero on success MDBX_INTERNAL_FUNC int mdbx_lck_downgrade(MDBX_env *env); /// \brief Locks LCK-file or/and table of readers for (de)registering. /// \return Error code or zero on success MDBX_INTERNAL_FUNC int mdbx_rdt_lock(MDBX_env *env); /// \brief Unlocks LCK-file or/and table of readers after (de)registering. MDBX_INTERNAL_FUNC void mdbx_rdt_unlock(MDBX_env *env); /// \brief Acquires lock for DB change (on writing transaction start) /// Reading transactions will not be blocked. /// Declared as LIBMDBX_API because it is used in mdbx_chk. /// \return Error code or zero on success LIBMDBX_API int mdbx_txn_lock(MDBX_env *env, bool dont_wait); /// \brief Releases lock once DB changes is made (after writing transaction /// has finished). /// Declared as LIBMDBX_API because it is used in mdbx_chk. LIBMDBX_API void mdbx_txn_unlock(MDBX_env *env); /// \brief Sets alive-flag of reader presence (indicative lock) for PID of /// the current process. The function does no more than needed for /// the correct working of mdbx_rpid_check() in other processes. /// \return Error code or zero on success MDBX_INTERNAL_FUNC int mdbx_rpid_set(MDBX_env *env); /// \brief Resets alive-flag of reader presence (indicative lock) /// for PID of the current process. The function does no more than needed /// for the correct working of mdbx_rpid_check() in other processes. /// \return Error code or zero on success MDBX_INTERNAL_FUNC int mdbx_rpid_clear(MDBX_env *env); /// \brief Checks for reading process status with the given pid with help of /// alive-flag of presence (indicative lock) or using another way. /// \return /// MDBX_RESULT_TRUE (-1) - if the reader process with the given PID is alive /// and working with DB (indicative lock is present). /// MDBX_RESULT_FALSE (0) - if the reader process with the given PID is absent /// or not working with DB (indicative lock is not present). /// Otherwise (not 0 and not -1) - error code. MDBX_INTERNAL_FUNC int mdbx_rpid_check(MDBX_env *env, uint32_t pid); #if defined(_WIN32) || defined(_WIN64) typedef void(WINAPI *MDBX_srwlock_function)(MDBX_srwlock *); MDBX_INTERNAL_VAR MDBX_srwlock_function mdbx_srwlock_Init, mdbx_srwlock_AcquireShared, mdbx_srwlock_ReleaseShared, mdbx_srwlock_AcquireExclusive, mdbx_srwlock_ReleaseExclusive; #if _WIN32_WINNT < 0x0600 /* prior to Windows Vista */ typedef enum _FILE_INFO_BY_HANDLE_CLASS { FileBasicInfo, FileStandardInfo, FileNameInfo, FileRenameInfo, FileDispositionInfo, FileAllocationInfo, FileEndOfFileInfo, FileStreamInfo, FileCompressionInfo, FileAttributeTagInfo, FileIdBothDirectoryInfo, FileIdBothDirectoryRestartInfo, FileIoPriorityHintInfo, FileRemoteProtocolInfo, MaximumFileInfoByHandleClass } FILE_INFO_BY_HANDLE_CLASS, *PFILE_INFO_BY_HANDLE_CLASS; typedef struct _FILE_END_OF_FILE_INFO { LARGE_INTEGER EndOfFile; } FILE_END_OF_FILE_INFO, *PFILE_END_OF_FILE_INFO; #define REMOTE_PROTOCOL_INFO_FLAG_LOOPBACK 0x00000001 #define REMOTE_PROTOCOL_INFO_FLAG_OFFLINE 0x00000002 typedef struct _FILE_REMOTE_PROTOCOL_INFO { USHORT StructureVersion; USHORT StructureSize; DWORD Protocol; USHORT ProtocolMajorVersion; USHORT ProtocolMinorVersion; USHORT ProtocolRevision; USHORT Reserved; DWORD Flags; struct { DWORD Reserved[8]; } GenericReserved; struct { DWORD Reserved[16]; } ProtocolSpecificReserved; } FILE_REMOTE_PROTOCOL_INFO, *PFILE_REMOTE_PROTOCOL_INFO; #endif /* _WIN32_WINNT < 0x0600 (prior to Windows Vista) */ typedef BOOL(WINAPI *MDBX_GetFileInformationByHandleEx)( _In_ HANDLE hFile, _In_ FILE_INFO_BY_HANDLE_CLASS FileInformationClass, _Out_ LPVOID lpFileInformation, _In_ DWORD dwBufferSize); MDBX_INTERNAL_VAR MDBX_GetFileInformationByHandleEx mdbx_GetFileInformationByHandleEx; typedef BOOL(WINAPI *MDBX_GetVolumeInformationByHandleW)( _In_ HANDLE hFile, _Out_opt_ LPWSTR lpVolumeNameBuffer, _In_ DWORD nVolumeNameSize, _Out_opt_ LPDWORD lpVolumeSerialNumber, _Out_opt_ LPDWORD lpMaximumComponentLength, _Out_opt_ LPDWORD lpFileSystemFlags, _Out_opt_ LPWSTR lpFileSystemNameBuffer, _In_ DWORD nFileSystemNameSize); MDBX_INTERNAL_VAR MDBX_GetVolumeInformationByHandleW mdbx_GetVolumeInformationByHandleW; typedef DWORD(WINAPI *MDBX_GetFinalPathNameByHandleW)(_In_ HANDLE hFile, _Out_ LPWSTR lpszFilePath, _In_ DWORD cchFilePath, _In_ DWORD dwFlags); MDBX_INTERNAL_VAR MDBX_GetFinalPathNameByHandleW mdbx_GetFinalPathNameByHandleW; typedef BOOL(WINAPI *MDBX_SetFileInformationByHandle)( _In_ HANDLE hFile, _In_ FILE_INFO_BY_HANDLE_CLASS FileInformationClass, _Out_ LPVOID lpFileInformation, _In_ DWORD dwBufferSize); MDBX_INTERNAL_VAR MDBX_SetFileInformationByHandle mdbx_SetFileInformationByHandle; typedef NTSTATUS(NTAPI *MDBX_NtFsControlFile)( IN HANDLE FileHandle, IN OUT HANDLE Event, IN OUT PVOID /* PIO_APC_ROUTINE */ ApcRoutine, IN OUT PVOID ApcContext, OUT PIO_STATUS_BLOCK IoStatusBlock, IN ULONG FsControlCode, IN OUT PVOID InputBuffer, IN ULONG InputBufferLength, OUT OPTIONAL PVOID OutputBuffer, IN ULONG OutputBufferLength); MDBX_INTERNAL_VAR MDBX_NtFsControlFile mdbx_NtFsControlFile; typedef uint64_t(WINAPI *MDBX_GetTickCount64)(void); MDBX_INTERNAL_VAR MDBX_GetTickCount64 mdbx_GetTickCount64; #if !defined(_WIN32_WINNT_WIN8) || _WIN32_WINNT < _WIN32_WINNT_WIN8 typedef struct _WIN32_MEMORY_RANGE_ENTRY { PVOID VirtualAddress; SIZE_T NumberOfBytes; } WIN32_MEMORY_RANGE_ENTRY, *PWIN32_MEMORY_RANGE_ENTRY; #endif /* Windows 8.x */ typedef BOOL(WINAPI *MDBX_PrefetchVirtualMemory)( HANDLE hProcess, ULONG_PTR NumberOfEntries, PWIN32_MEMORY_RANGE_ENTRY VirtualAddresses, ULONG Flags); MDBX_INTERNAL_VAR MDBX_PrefetchVirtualMemory mdbx_PrefetchVirtualMemory; typedef enum _SECTION_INHERIT { ViewShare = 1, ViewUnmap = 2 } SECTION_INHERIT; typedef NTSTATUS(NTAPI *MDBX_NtExtendSection)(IN HANDLE SectionHandle, IN PLARGE_INTEGER NewSectionSize); MDBX_INTERNAL_VAR MDBX_NtExtendSection mdbx_NtExtendSection; static __inline bool mdbx_RunningUnderWine(void) { return !mdbx_NtExtendSection; } typedef LSTATUS(WINAPI *MDBX_RegGetValueA)(HKEY hkey, LPCSTR lpSubKey, LPCSTR lpValue, DWORD dwFlags, LPDWORD pdwType, PVOID pvData, LPDWORD pcbData); MDBX_INTERNAL_VAR MDBX_RegGetValueA mdbx_RegGetValueA; #endif /* Windows */ #endif /* !__cplusplus */ /*----------------------------------------------------------------------------*/ #if defined(_MSC_VER) && _MSC_VER >= 1900 /* LY: MSVC 2015/2017/2019 has buggy/inconsistent PRIuPTR/PRIxPTR macros * for internal format-args checker. */ #undef PRIuPTR #undef PRIiPTR #undef PRIdPTR #undef PRIxPTR #define PRIuPTR "Iu" #define PRIiPTR "Ii" #define PRIdPTR "Id" #define PRIxPTR "Ix" #define PRIuSIZE "zu" #define PRIiSIZE "zi" #define PRIdSIZE "zd" #define PRIxSIZE "zx" #endif /* fix PRI*PTR for _MSC_VER */ #ifndef PRIuSIZE #define PRIuSIZE PRIuPTR #define PRIiSIZE PRIiPTR #define PRIdSIZE PRIdPTR #define PRIxSIZE PRIxPTR #endif /* PRI*SIZE macros for MSVC */ #ifdef _MSC_VER #pragma warning(pop) #endif #define mdbx_sourcery_anchor XCONCAT(mdbx_sourcery_, MDBX_BUILD_SOURCERY) #if defined(xMDBX_TOOLS) extern LIBMDBX_API const char *const mdbx_sourcery_anchor; #endif /******************************************************************************* ******************************************************************************* ******************************************************************************* * * * #### ##### ##### # #### # # #### * # # # # # # # # ## # # * # # # # # # # # # # # #### * # # ##### # # # # # # # # * # # # # # # # # ## # # * #### # # # #### # # #### * * */ /** \defgroup build_option Build options * The libmdbx build options. @{ */ /** Using fcntl(F_FULLFSYNC) with 5-10 times slowdown */ #define MDBX_OSX_WANNA_DURABILITY 0 /** Using fsync() with chance of data lost on power failure */ #define MDBX_OSX_WANNA_SPEED 1 #ifndef MDBX_OSX_SPEED_INSTEADOF_DURABILITY /** Choices \ref MDBX_OSX_WANNA_DURABILITY or \ref MDBX_OSX_WANNA_SPEED * for OSX & iOS */ #define MDBX_OSX_SPEED_INSTEADOF_DURABILITY MDBX_OSX_WANNA_DURABILITY #endif /* MDBX_OSX_SPEED_INSTEADOF_DURABILITY */ /** Controls checking PID against reuse DB environment after the fork() */ #ifndef MDBX_ENV_CHECKPID #if defined(MADV_DONTFORK) || defined(_WIN32) || defined(_WIN64) /* PID check could be omitted: * - on Linux when madvise(MADV_DONTFORK) is available, i.e. after the fork() * mapped pages will not be available for child process. * - in Windows where fork() not available. */ #define MDBX_ENV_CHECKPID 0 #else #define MDBX_ENV_CHECKPID 1 #endif #define MDBX_ENV_CHECKPID_CONFIG "AUTO=" MDBX_STRINGIFY(MDBX_ENV_CHECKPID) #else #define MDBX_ENV_CHECKPID_CONFIG MDBX_STRINGIFY(MDBX_ENV_CHECKPID) #endif /* MDBX_ENV_CHECKPID */ /** Controls checking transaction owner thread against misuse transactions from * other threads. */ #ifndef MDBX_TXN_CHECKOWNER #define MDBX_TXN_CHECKOWNER 1 #define MDBX_TXN_CHECKOWNER_CONFIG "AUTO=" MDBX_STRINGIFY(MDBX_TXN_CHECKOWNER) #else #define MDBX_TXN_CHECKOWNER_CONFIG MDBX_STRINGIFY(MDBX_TXN_CHECKOWNER) #endif /* MDBX_TXN_CHECKOWNER */ /** Does a system have battery-backed Real-Time Clock or just a fake. */ #ifndef MDBX_TRUST_RTC #if defined(__linux__) || defined(__gnu_linux__) || defined(__NetBSD__) || \ defined(__OpenBSD__) #define MDBX_TRUST_RTC 0 /* a lot of embedded systems have a fake RTC */ #else #define MDBX_TRUST_RTC 1 #endif #define MDBX_TRUST_RTC_CONFIG "AUTO=" MDBX_STRINGIFY(MDBX_TRUST_RTC) #else #define MDBX_TRUST_RTC_CONFIG MDBX_STRINGIFY(MDBX_TRUST_RTC) #endif /* MDBX_TRUST_RTC */ /** Controls online database auto-compactification during write-transactions. */ #ifndef MDBX_ENABLE_REFUND #define MDBX_ENABLE_REFUND 1 #elif !(MDBX_ENABLE_REFUND == 0 || MDBX_ENABLE_REFUND == 1) #error MDBX_ENABLE_REFUND must be defined as 0 or 1 #endif /* MDBX_ENABLE_REFUND */ /** Controls gathering statistics for page operations. */ #ifndef MDBX_ENABLE_PGOP_STAT #define MDBX_ENABLE_PGOP_STAT 1 #elif !(MDBX_ENABLE_PGOP_STAT == 0 || MDBX_ENABLE_PGOP_STAT == 1) #error MDBX_ENABLE_PGOP_STAT must be defined as 0 or 1 #endif /* MDBX_ENABLE_PGOP_STAT */ /** Controls use of POSIX madvise() hints and friends. */ #ifndef MDBX_ENABLE_MADVISE #define MDBX_ENABLE_MADVISE 1 #elif !(MDBX_ENABLE_MADVISE == 0 || MDBX_ENABLE_MADVISE == 1) #error MDBX_ENABLE_MADVISE must be defined as 0 or 1 #endif /* MDBX_ENABLE_MADVISE */ /** Disable some checks to reduce an overhead and detection probability of * database corruption to a values closer to the LMDB. */ #ifndef MDBX_DISABLE_PAGECHECKS #define MDBX_DISABLE_PAGECHECKS 0 #elif !(MDBX_DISABLE_PAGECHECKS == 0 || MDBX_DISABLE_PAGECHECKS == 1) #error MDBX_DISABLE_PAGECHECKS must be defined as 0 or 1 #endif /* MDBX_DISABLE_PAGECHECKS */ #ifndef MDBX_PNL_PREALLOC_FOR_RADIXSORT #define MDBX_PNL_PREALLOC_FOR_RADIXSORT 1 #elif !(MDBX_PNL_PREALLOC_FOR_RADIXSORT == 0 || \ MDBX_PNL_PREALLOC_FOR_RADIXSORT == 1) #error MDBX_PNL_PREALLOC_FOR_RADIXSORT must be defined as 0 or 1 #endif /* MDBX_PNL_PREALLOC_FOR_RADIXSORT */ #ifndef MDBX_DPL_PREALLOC_FOR_RADIXSORT #define MDBX_DPL_PREALLOC_FOR_RADIXSORT 1 #elif !(MDBX_DPL_PREALLOC_FOR_RADIXSORT == 0 || \ MDBX_DPL_PREALLOC_FOR_RADIXSORT == 1) #error MDBX_DPL_PREALLOC_FOR_RADIXSORT must be defined as 0 or 1 #endif /* MDBX_DPL_PREALLOC_FOR_RADIXSORT */ /* Basically, this build-option is for TODO. Guess it should be replaced * with MDBX_ENABLE_WRITEMAP_SPILLING with the three variants: * 0/OFF = Don't track dirty pages at all and don't spilling ones. * This should be by-default on Linux and may-be other systems * (not sure: Darwin/OSX, FreeBSD, Windows 10) where kernel provides * properly LRU tracking and async writing on-demand. * 1/ON = Lite tracking of dirty pages but with LRU labels and explicit * spilling with msync(MS_ASYNC). */ #ifndef MDBX_FAKE_SPILL_WRITEMAP #if defined(__linux__) || defined(__gnu_linux__) #define MDBX_FAKE_SPILL_WRITEMAP 1 /* msync(MS_ASYNC) is no-op on Linux */ #else #define MDBX_FAKE_SPILL_WRITEMAP 0 #endif #elif !(MDBX_FAKE_SPILL_WRITEMAP == 0 || MDBX_FAKE_SPILL_WRITEMAP == 1) #error MDBX_FAKE_SPILL_WRITEMAP must be defined as 0 or 1 #endif /* MDBX_FAKE_SPILL_WRITEMAP */ /** Controls sort order of internal page number lists. * This mostly experimental/advanced option with not for regular MDBX users. * \warning The database format depend on this option and libmdbx builded with * different option value are incompatible. */ #ifndef MDBX_PNL_ASCENDING #define MDBX_PNL_ASCENDING 0 #elif !(MDBX_PNL_ASCENDING == 0 || MDBX_PNL_ASCENDING == 1) #error MDBX_PNL_ASCENDING must be defined as 0 or 1 #endif /* MDBX_PNL_ASCENDING */ /** Avoid dependence from MSVC CRT and use ntdll.dll instead. */ #ifndef MDBX_WITHOUT_MSVC_CRT #define MDBX_WITHOUT_MSVC_CRT 1 #elif !(MDBX_WITHOUT_MSVC_CRT == 0 || MDBX_WITHOUT_MSVC_CRT == 1) #error MDBX_WITHOUT_MSVC_CRT must be defined as 0 or 1 #endif /* MDBX_WITHOUT_MSVC_CRT */ /** Size of buffer used during copying a environment/database file. */ #ifndef MDBX_ENVCOPY_WRITEBUF #define MDBX_ENVCOPY_WRITEBUF 1048576u #elif MDBX_ENVCOPY_WRITEBUF < 65536u || MDBX_ENVCOPY_WRITEBUF > 1073741824u || \ MDBX_ENVCOPY_WRITEBUF % 65536u #error MDBX_ENVCOPY_WRITEBUF must be defined in range 65536..1073741824 and be multiple of 65536 #endif /* MDBX_ENVCOPY_WRITEBUF */ /** Forces assertion checking */ #ifndef MDBX_FORCE_ASSERTIONS #define MDBX_FORCE_ASSERTIONS 0 #elif !(MDBX_FORCE_ASSERTIONS == 0 || MDBX_FORCE_ASSERTIONS == 1) #error MDBX_FORCE_ASSERTIONS must be defined as 0 or 1 #endif /* MDBX_FORCE_ASSERTIONS */ /** Presumed malloc size overhead for each allocation * to adjust allocations to be more aligned. */ #ifndef MDBX_ASSUME_MALLOC_OVERHEAD #ifdef __SIZEOF_POINTER__ #define MDBX_ASSUME_MALLOC_OVERHEAD (__SIZEOF_POINTER__ * 2u) #else #define MDBX_ASSUME_MALLOC_OVERHEAD (sizeof(void *) * 2u) #endif #elif MDBX_ASSUME_MALLOC_OVERHEAD < 0 || MDBX_ASSUME_MALLOC_OVERHEAD > 64 || \ MDBX_ASSUME_MALLOC_OVERHEAD % 4 #error MDBX_ASSUME_MALLOC_OVERHEAD must be defined in range 0..64 and be multiple of 4 #endif /* MDBX_ASSUME_MALLOC_OVERHEAD */ /** In case the MDBX_DEBUG is undefined set it corresponding to NDEBUG */ #ifndef MDBX_DEBUG #ifdef NDEBUG #define MDBX_DEBUG 0 #else #define MDBX_DEBUG 1 #endif #endif /* MDBX_DEBUG */ /** If defined then enables integration with Valgrind, * a memory analyzing tool. */ #ifndef MDBX_USE_VALGRIND #endif /* MDBX_USE_VALGRIND */ /** If defined then enables use C11 atomics, * otherwise detects ones availability automatically. */ #ifndef MDBX_HAVE_C11ATOMICS #endif /* MDBX_HAVE_C11ATOMICS */ //------------------------------------------------------------------------------ /** Win32 File Locking API for \ref MDBX_LOCKING */ #define MDBX_LOCKING_WIN32FILES -1 /** SystemV IPC semaphores for \ref MDBX_LOCKING */ #define MDBX_LOCKING_SYSV 5 /** POSIX-1 Shared anonymous semaphores for \ref MDBX_LOCKING */ #define MDBX_LOCKING_POSIX1988 1988 /** POSIX-2001 Shared Mutexes for \ref MDBX_LOCKING */ #define MDBX_LOCKING_POSIX2001 2001 /** POSIX-2008 Robust Mutexes for \ref MDBX_LOCKING */ #define MDBX_LOCKING_POSIX2008 2008 /** BeOS Benaphores, aka Futexes for \ref MDBX_LOCKING */ #define MDBX_LOCKING_BENAPHORE 1995 /** Advanced: Choices the locking implementation (autodetection by default). */ #if defined(_WIN32) || defined(_WIN64) #define MDBX_LOCKING MDBX_LOCKING_WIN32FILES #else #ifndef MDBX_LOCKING #if defined(_POSIX_THREAD_PROCESS_SHARED) && \ _POSIX_THREAD_PROCESS_SHARED >= 200112L && !defined(__FreeBSD__) /* Some platforms define the EOWNERDEAD error code even though they * don't support Robust Mutexes. If doubt compile with -MDBX_LOCKING=2001. */ #if defined(EOWNERDEAD) && _POSIX_THREAD_PROCESS_SHARED >= 200809L && \ ((defined(_POSIX_THREAD_ROBUST_PRIO_INHERIT) && \ _POSIX_THREAD_ROBUST_PRIO_INHERIT > 0) || \ (defined(_POSIX_THREAD_ROBUST_PRIO_PROTECT) && \ _POSIX_THREAD_ROBUST_PRIO_PROTECT > 0) || \ defined(PTHREAD_MUTEX_ROBUST) || defined(PTHREAD_MUTEX_ROBUST_NP)) && \ (!defined(__GLIBC__) || \ __GLIBC_PREREQ(2, 10) /* troubles with Robust mutexes before 2.10 */) #define MDBX_LOCKING MDBX_LOCKING_POSIX2008 #else #define MDBX_LOCKING MDBX_LOCKING_POSIX2001 #endif #elif defined(__sun) || defined(__SVR4) || defined(__svr4__) #define MDBX_LOCKING MDBX_LOCKING_POSIX1988 #else #define MDBX_LOCKING MDBX_LOCKING_SYSV #endif #define MDBX_LOCKING_CONFIG "AUTO=" MDBX_STRINGIFY(MDBX_LOCKING) #else #define MDBX_LOCKING_CONFIG MDBX_STRINGIFY(MDBX_LOCKING) #endif /* MDBX_LOCKING */ #endif /* !Windows */ /** Advanced: Using POSIX OFD-locks (autodetection by default). */ #ifndef MDBX_USE_OFDLOCKS #if defined(F_OFD_SETLK) && defined(F_OFD_SETLKW) && defined(F_OFD_GETLK) && \ !defined(MDBX_SAFE4QEMU) && \ !defined(__sun) /* OFD-lock are broken on Solaris */ #define MDBX_USE_OFDLOCKS 1 #else #define MDBX_USE_OFDLOCKS 0 #endif #define MDBX_USE_OFDLOCKS_CONFIG "AUTO=" MDBX_STRINGIFY(MDBX_USE_OFDLOCKS) #else #define MDBX_USE_OFDLOCKS_CONFIG MDBX_STRINGIFY(MDBX_USE_OFDLOCKS) #endif /* MDBX_USE_OFDLOCKS */ /** Advanced: Using sendfile() syscall (autodetection by default). */ #ifndef MDBX_USE_SENDFILE #if ((defined(__linux__) || defined(__gnu_linux__)) && \ !defined(__ANDROID_API__)) || \ (defined(__ANDROID_API__) && __ANDROID_API__ >= 21) #define MDBX_USE_SENDFILE 1 #else #define MDBX_USE_SENDFILE 0 #endif #endif /* MDBX_USE_SENDFILE */ /** Advanced: Using copy_file_range() syscall (autodetection by default). */ #ifndef MDBX_USE_COPYFILERANGE #if __GLIBC_PREREQ(2, 27) && defined(_GNU_SOURCE) #define MDBX_USE_COPYFILERANGE 1 #else #define MDBX_USE_COPYFILERANGE 0 #endif #endif /* MDBX_USE_COPYFILERANGE */ /** Advanced: Using sync_file_range() syscall (autodetection by default). */ #ifndef MDBX_USE_SYNCFILERANGE #if ((defined(__linux__) || defined(__gnu_linux__)) && \ defined(SYNC_FILE_RANGE_WRITE) && !defined(__ANDROID_API__)) || \ (defined(__ANDROID_API__) && __ANDROID_API__ >= 26) #define MDBX_USE_SYNCFILERANGE 1 #else #define MDBX_USE_SYNCFILERANGE 0 #endif #endif /* MDBX_USE_SYNCFILERANGE */ //------------------------------------------------------------------------------ #ifndef MDBX_CPU_WRITEBACK_INCOHERENT #if defined(__ia32__) || defined(__e2k__) || defined(__hppa) || \ defined(__hppa__) || defined(DOXYGEN) #define MDBX_CPU_WRITEBACK_INCOHERENT 0 #else #define MDBX_CPU_WRITEBACK_INCOHERENT 1 #endif #endif /* MDBX_CPU_WRITEBACK_INCOHERENT */ #ifndef MDBX_MMAP_INCOHERENT_FILE_WRITE #ifdef __OpenBSD__ #define MDBX_MMAP_INCOHERENT_FILE_WRITE 1 #else #define MDBX_MMAP_INCOHERENT_FILE_WRITE 0 #endif #endif /* MDBX_MMAP_INCOHERENT_FILE_WRITE */ #ifndef MDBX_MMAP_INCOHERENT_CPU_CACHE #if defined(__mips) || defined(__mips__) || defined(__mips64) || \ defined(__mips64__) || defined(_M_MRX000) || defined(_MIPS_) || \ defined(__MWERKS__) || defined(__sgi) /* MIPS has cache coherency issues. */ #define MDBX_MMAP_INCOHERENT_CPU_CACHE 1 #else /* LY: assume no relevant mmap/dcache issues. */ #define MDBX_MMAP_INCOHERENT_CPU_CACHE 0 #endif #endif /* MDBX_MMAP_INCOHERENT_CPU_CACHE */ #ifndef MDBX_64BIT_ATOMIC #if MDBX_WORDBITS >= 64 || defined(DOXYGEN) #define MDBX_64BIT_ATOMIC 1 #else #define MDBX_64BIT_ATOMIC 0 #endif #define MDBX_64BIT_ATOMIC_CONFIG "AUTO=" MDBX_STRINGIFY(MDBX_64BIT_ATOMIC) #else #define MDBX_64BIT_ATOMIC_CONFIG MDBX_STRINGIFY(MDBX_64BIT_ATOMIC) #endif /* MDBX_64BIT_ATOMIC */ #ifndef MDBX_64BIT_CAS #if defined(ATOMIC_LLONG_LOCK_FREE) #if ATOMIC_LLONG_LOCK_FREE > 1 #define MDBX_64BIT_CAS 1 #else #define MDBX_64BIT_CAS 0 #endif #elif defined(__GCC_ATOMIC_LLONG_LOCK_FREE) #if __GCC_ATOMIC_LLONG_LOCK_FREE > 1 #define MDBX_64BIT_CAS 1 #else #define MDBX_64BIT_CAS 0 #endif #elif defined(__CLANG_ATOMIC_LLONG_LOCK_FREE) #if __CLANG_ATOMIC_LLONG_LOCK_FREE > 1 #define MDBX_64BIT_CAS 1 #else #define MDBX_64BIT_CAS 0 #endif #elif defined(_MSC_VER) || defined(__APPLE__) || defined(DOXYGEN) #define MDBX_64BIT_CAS 1 #else #define MDBX_64BIT_CAS MDBX_64BIT_ATOMIC #endif #define MDBX_64BIT_CAS_CONFIG "AUTO=" MDBX_STRINGIFY(MDBX_64BIT_CAS) #else #define MDBX_64BIT_CAS_CONFIG MDBX_STRINGIFY(MDBX_64BIT_CAS) #endif /* MDBX_64BIT_CAS */ #ifndef MDBX_UNALIGNED_OK #ifdef _MSC_VER #define MDBX_UNALIGNED_OK 1 /* avoid MSVC misoptimization */ #elif __CLANG_PREREQ(5, 0) || __GNUC_PREREQ(5, 0) #define MDBX_UNALIGNED_OK 0 /* expecting optimization is well done */ #elif (defined(__ia32__) || defined(__ARM_FEATURE_UNALIGNED)) && \ !defined(__ALIGNED__) #define MDBX_UNALIGNED_OK 1 #else #define MDBX_UNALIGNED_OK 0 #endif #endif /* MDBX_UNALIGNED_OK */ #ifndef MDBX_CACHELINE_SIZE #if defined(SYSTEM_CACHE_ALIGNMENT_SIZE) #define MDBX_CACHELINE_SIZE SYSTEM_CACHE_ALIGNMENT_SIZE #elif defined(__ia64__) || defined(__ia64) || defined(_M_IA64) #define MDBX_CACHELINE_SIZE 128 #else #define MDBX_CACHELINE_SIZE 64 #endif #endif /* MDBX_CACHELINE_SIZE */ /** @} end of build options */ /******************************************************************************* ******************************************************************************* ******************************************************************************/ #ifdef DOXYGEN /* !!! Actually this is a fake definitions !!! * !!! for documentation generation by Doxygen !!! */ /** Controls enabling of debugging features. * * - `MDBX_DEBUG = 0` (by default) Disables any debugging features at all, * including logging and assertion controls. * Logging level and corresponding debug flags changing * by \ref mdbx_setup_debug() will not have effect. * - `MDBX_DEBUG > 0` Enables code for the debugging features (logging, * assertions checking and internal audit). * Simultaneously sets the default logging level * to the `MDBX_DEBUG` value. * Also enables \ref MDBX_DBG_AUDIT if `MDBX_DEBUG >= 2`. * * \ingroup build_option */ #define MDBX_DEBUG 0...7 /** Disables using of GNU libc extensions. */ #define MDBX_DISABLE_GNU_SOURCE 0 or 1 #endif /* DOXYGEN */ /* Undefine the NDEBUG if debugging is enforced by MDBX_DEBUG */ #if MDBX_DEBUG #undef NDEBUG #endif /*----------------------------------------------------------------------------*/ /* Atomics */ enum MDBX_memory_order { mo_Relaxed, mo_AcquireRelease, mo_SequentialConsistency }; typedef union { volatile uint32_t weak; #ifdef MDBX_HAVE_C11ATOMICS volatile _Atomic uint32_t c11a; #endif /* MDBX_HAVE_C11ATOMICS */ } MDBX_atomic_uint32_t; typedef union { volatile uint64_t weak; #if defined(MDBX_HAVE_C11ATOMICS) && (MDBX_64BIT_CAS || MDBX_64BIT_ATOMIC) volatile _Atomic uint64_t c11a; #endif #if !defined(MDBX_HAVE_C11ATOMICS) || !MDBX_64BIT_CAS || !MDBX_64BIT_ATOMIC __anonymous_struct_extension__ struct { #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ MDBX_atomic_uint32_t low, high; #elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ MDBX_atomic_uint32_t high, low; #else #error "FIXME: Unsupported byte order" #endif /* __BYTE_ORDER__ */ }; #endif } MDBX_atomic_uint64_t; #ifdef MDBX_HAVE_C11ATOMICS /* Crutches for C11 atomic compiler's bugs */ #if defined(__e2k__) && defined(__LCC__) && __LCC__ < /* FIXME */ 127 #define MDBX_c11a_ro(type, ptr) (&(ptr)->weak) #define MDBX_c11a_rw(type, ptr) (&(ptr)->weak) #elif defined(__clang__) && __clang__ < 8 #define MDBX_c11a_ro(type, ptr) ((volatile _Atomic(type) *)&(ptr)->c11a) #define MDBX_c11a_rw(type, ptr) (&(ptr)->c11a) #else #define MDBX_c11a_ro(type, ptr) (&(ptr)->c11a) #define MDBX_c11a_rw(type, ptr) (&(ptr)->c11a) #endif /* Crutches for C11 atomic compiler's bugs */ static __always_inline memory_order mo_c11_store(enum MDBX_memory_order fence) { switch (fence) { default: assert(false); __unreachable(); case mo_Relaxed: return memory_order_relaxed; case mo_AcquireRelease: return memory_order_release; case mo_SequentialConsistency: return memory_order_seq_cst; } } static __always_inline memory_order mo_c11_load(enum MDBX_memory_order fence) { switch (fence) { default: assert(false); __unreachable(); case mo_Relaxed: return memory_order_relaxed; case mo_AcquireRelease: return memory_order_acquire; case mo_SequentialConsistency: return memory_order_seq_cst; } } #endif /* MDBX_HAVE_C11ATOMICS */ #ifndef __cplusplus MDBX_MAYBE_UNUSED static __always_inline void mdbx_memory_fence(enum MDBX_memory_order order, bool write) { #ifdef MDBX_HAVE_C11ATOMICS atomic_thread_fence(write ? mo_c11_store(order) : mo_c11_load(order)); #else /* MDBX_HAVE_C11ATOMICS */ mdbx_compiler_barrier(); if (write && order > (MDBX_CPU_WRITEBACK_INCOHERENT ? mo_Relaxed : mo_AcquireRelease)) mdbx_memory_barrier(); #endif /* MDBX_HAVE_C11ATOMICS */ } MDBX_MAYBE_UNUSED static __always_inline uint32_t atomic_store32(MDBX_atomic_uint32_t *p, const uint32_t value, enum MDBX_memory_order order) { STATIC_ASSERT(sizeof(MDBX_atomic_uint32_t) == 4); #ifdef MDBX_HAVE_C11ATOMICS assert(atomic_is_lock_free(MDBX_c11a_rw(uint32_t, p))); atomic_store_explicit(MDBX_c11a_rw(uint32_t, p), value, mo_c11_store(order)); #else /* MDBX_HAVE_C11ATOMICS */ if (order != mo_Relaxed) mdbx_compiler_barrier(); p->weak = value; mdbx_memory_fence(order, true); #endif /* MDBX_HAVE_C11ATOMICS */ return value; } MDBX_MAYBE_UNUSED static __always_inline uint32_t atomic_load32(const MDBX_atomic_uint32_t *p, enum MDBX_memory_order order) { STATIC_ASSERT(sizeof(MDBX_atomic_uint32_t) == 4); #ifdef MDBX_HAVE_C11ATOMICS assert(atomic_is_lock_free(MDBX_c11a_ro(uint32_t, p))); return atomic_load_explicit(MDBX_c11a_ro(uint32_t, p), mo_c11_load(order)); #else /* MDBX_HAVE_C11ATOMICS */ mdbx_memory_fence(order, false); const uint32_t value = p->weak; if (order != mo_Relaxed) mdbx_compiler_barrier(); return value; #endif /* MDBX_HAVE_C11ATOMICS */ } #endif /* !__cplusplus */ /*----------------------------------------------------------------------------*/ /* Basic constants and types */ /* A stamp that identifies a file as an MDBX file. * There's nothing special about this value other than that it is easily * recognizable, and it will reflect any byte order mismatches. */ #define MDBX_MAGIC UINT64_C(/* 56-bit prime */ 0x59659DBDEF4C11) /* FROZEN: The version number for a database's datafile format. */ #define MDBX_DATA_VERSION 3 /* The version number for a database's lockfile format. */ #define MDBX_LOCK_VERSION 4 /* handle for the DB used to track free pages. */ #define FREE_DBI 0 /* handle for the default DB. */ #define MAIN_DBI 1 /* Number of DBs in metapage (free and main) - also hardcoded elsewhere */ #define CORE_DBS 2 /* Number of meta pages - also hardcoded elsewhere */ #define NUM_METAS 3 /* A page number in the database. * * MDBX uses 32 bit for page numbers. This limits database * size up to 2^44 bytes, in case of 4K pages. */ typedef uint32_t pgno_t; typedef MDBX_atomic_uint32_t atomic_pgno_t; #define PRIaPGNO PRIu32 #define MAX_PAGENO UINT32_C(0x7FFFffff) #define MIN_PAGENO NUM_METAS #define SAFE64_INVALID_THRESHOLD UINT64_C(0xffffFFFF00000000) /* A transaction ID. */ typedef uint64_t txnid_t; typedef MDBX_atomic_uint64_t atomic_txnid_t; #define PRIaTXN PRIi64 #define MIN_TXNID UINT64_C(1) #define MAX_TXNID (SAFE64_INVALID_THRESHOLD - 1) #define INITIAL_TXNID (MIN_TXNID + NUM_METAS - 1) #define INVALID_TXNID UINT64_MAX /* LY: for testing non-atomic 64-bit txnid on 32-bit arches. * #define xMDBX_TXNID_STEP (UINT32_MAX / 3) */ #ifndef xMDBX_TXNID_STEP #if MDBX_64BIT_CAS #define xMDBX_TXNID_STEP 1u #else #define xMDBX_TXNID_STEP 2u #endif #endif /* xMDBX_TXNID_STEP */ /* Used for offsets within a single page. * Since memory pages are typically 4 or 8KB in size, 12-13 bits, * this is plenty. */ typedef uint16_t indx_t; #define MEGABYTE ((size_t)1 << 20) /*----------------------------------------------------------------------------*/ /* Core structures for database and shared memory (i.e. format definition) */ #pragma pack(push, 4) /* Information about a single database in the environment. */ typedef struct MDBX_db { uint16_t md_flags; /* see mdbx_dbi_open */ uint16_t md_depth; /* depth of this tree */ uint32_t md_xsize; /* key-size for MDBX_DUPFIXED (LEAF2 pages) */ pgno_t md_root; /* the root page of this tree */ pgno_t md_branch_pages; /* number of internal pages */ pgno_t md_leaf_pages; /* number of leaf pages */ pgno_t md_overflow_pages; /* number of overflow pages */ uint64_t md_seq; /* table sequence counter */ uint64_t md_entries; /* number of data items */ uint64_t md_mod_txnid; /* txnid of last committed modification */ } MDBX_db; /* database size-related parameters */ typedef struct MDBX_geo { uint16_t grow_pv; /* datafile growth step as a 16-bit packed (exponential quantized) value */ uint16_t shrink_pv; /* datafile shrink threshold as a 16-bit packed (exponential quantized) value */ pgno_t lower; /* minimal size of datafile in pages */ pgno_t upper; /* maximal size of datafile in pages */ pgno_t now; /* current size of datafile in pages */ pgno_t next; /* first unused page in the datafile, but actually the file may be shorter. */ } MDBX_geo; /* Meta page content. * A meta page is the start point for accessing a database snapshot. * Pages 0-1 are meta pages. Transaction N writes meta page (N % 2). */ typedef struct MDBX_meta { /* Stamp identifying this as an MDBX file. * It must be set to MDBX_MAGIC with MDBX_DATA_VERSION. */ uint32_t mm_magic_and_version[2]; /* txnid that committed this page, the first of a two-phase-update pair */ uint32_t mm_txnid_a[2]; uint16_t mm_extra_flags; /* extra DB flags, zero (nothing) for now */ uint8_t mm_validator_id; /* ID of checksum and page validation method, * zero (nothing) for now */ uint8_t mm_extra_pagehdr; /* extra bytes in the page header, * zero (nothing) for now */ MDBX_geo mm_geo; /* database size-related parameters */ MDBX_db mm_dbs[CORE_DBS]; /* first is free space, 2nd is main db */ /* The size of pages used in this DB */ #define mm_psize mm_dbs[FREE_DBI].md_xsize MDBX_canary mm_canary; #define MDBX_DATASIGN_NONE 0u #define MDBX_DATASIGN_WEAK 1u #define SIGN_IS_STEADY(sign) ((sign) > MDBX_DATASIGN_WEAK) #define META_IS_STEADY(meta) \ SIGN_IS_STEADY(unaligned_peek_u64(4, (meta)->mm_datasync_sign)) uint32_t mm_datasync_sign[2]; /* txnid that committed this page, the second of a two-phase-update pair */ uint32_t mm_txnid_b[2]; /* Number of non-meta pages which were put in GC after COW. May be 0 in case * DB was previously handled by libmdbx without corresponding feature. * This value in couple with mr_snapshot_pages_retired allows fast estimation * of "how much reader is restraining GC recycling". */ uint32_t mm_pages_retired[2]; /* The analogue /proc/sys/kernel/random/boot_id or similar to determine * whether the system was rebooted after the last use of the database files. * If there was no reboot, but there is no need to rollback to the last * steady sync point. Zeros mean that no relevant information is available * from the system. */ bin128_t mm_bootid; } MDBX_meta; #pragma pack(1) /* Common header for all page types. The page type depends on mp_flags. * * P_BRANCH and P_LEAF pages have unsorted 'MDBX_node's at the end, with * sorted mp_ptrs[] entries referring to them. Exception: P_LEAF2 pages * omit mp_ptrs and pack sorted MDBX_DUPFIXED values after the page header. * * P_OVERFLOW records occupy one or more contiguous pages where only the * first has a page header. They hold the real data of F_BIGDATA nodes. * * P_SUBP sub-pages are small leaf "pages" with duplicate data. * A node with flag F_DUPDATA but not F_SUBDATA contains a sub-page. * (Duplicate data can also go in sub-databases, which use normal pages.) * * P_META pages contain MDBX_meta, the start point of an MDBX snapshot. * * Each non-metapage up to MDBX_meta.mm_last_pg is reachable exactly once * in the snapshot: Either used by a database or listed in a GC record. */ typedef struct MDBX_page { union { #define IS_FROZEN(txn, p) ((p)->mp_txnid < (txn)->mt_txnid) #define IS_SPILLED(txn, p) ((p)->mp_txnid == (txn)->mt_txnid) #define IS_SHADOWED(txn, p) ((p)->mp_txnid > (txn)->mt_txnid) #define IS_VALID(txn, p) ((p)->mp_txnid <= (txn)->mt_front) #define IS_MODIFIABLE(txn, p) ((p)->mp_txnid == (txn)->mt_front) uint64_t mp_txnid; struct MDBX_page *mp_next; /* for in-memory list of freed pages */ }; uint16_t mp_leaf2_ksize; /* key size if this is a LEAF2 page */ #define P_BRANCH 0x01 /* branch page */ #define P_LEAF 0x02 /* leaf page */ #define P_OVERFLOW 0x04 /* overflow page */ #define P_META 0x08 /* meta page */ #define P_BAD 0x10 /* explicit flag for invalid/bad page */ #define P_LEAF2 0x20 /* for MDBX_DUPFIXED records */ #define P_SUBP 0x40 /* for MDBX_DUPSORT sub-pages */ #define P_SPILLED 0x2000 /* spilled in parent txn */ #define P_LOOSE 0x4000 /* page was dirtied then freed, can be reused */ #define P_FROZEN 0x8000 /* used for retire page with known status */ #define P_ILL_BITS (~(P_BRANCH | P_LEAF | P_LEAF2 | P_OVERFLOW | P_SPILLED)) uint16_t mp_flags; union { uint32_t mp_pages; /* number of overflow pages */ __anonymous_struct_extension__ struct { indx_t mp_lower; /* lower bound of free space */ indx_t mp_upper; /* upper bound of free space */ }; }; pgno_t mp_pgno; /* page number */ #if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || \ (!defined(__cplusplus) && defined(_MSC_VER)) indx_t mp_ptrs[] /* dynamic size */; #endif /* C99 */ } MDBX_page; /* Size of the page header, excluding dynamic data at the end */ #define PAGEHDRSZ ((unsigned)offsetof(MDBX_page, mp_ptrs)) #pragma pack(pop) #if MDBX_ENABLE_PGOP_STAT /* Statistics of page operations overall of all (running, completed and aborted) * transactions */ typedef struct { MDBX_atomic_uint64_t newly; /* Quantity of a new pages added */ MDBX_atomic_uint64_t cow; /* Quantity of pages copied for update */ MDBX_atomic_uint64_t clone; /* Quantity of parent's dirty pages clones for nested transactions */ MDBX_atomic_uint64_t split; /* Page splits */ MDBX_atomic_uint64_t merge; /* Page merges */ MDBX_atomic_uint64_t spill; /* Quantity of spilled dirty pages */ MDBX_atomic_uint64_t unspill; /* Quantity of unspilled/reloaded pages */ MDBX_atomic_uint64_t wops; /* Number of explicit write operations (not a pages) to a disk */ } MDBX_pgop_stat_t; #endif /* MDBX_ENABLE_PGOP_STAT */ #if MDBX_LOCKING == MDBX_LOCKING_WIN32FILES #define MDBX_CLOCK_SIGN UINT32_C(0xF10C) typedef void mdbx_ipclock_t; #elif MDBX_LOCKING == MDBX_LOCKING_SYSV #define MDBX_CLOCK_SIGN UINT32_C(0xF18D) typedef mdbx_pid_t mdbx_ipclock_t; #ifndef EOWNERDEAD #define EOWNERDEAD MDBX_RESULT_TRUE #endif #elif MDBX_LOCKING == MDBX_LOCKING_POSIX2001 || \ MDBX_LOCKING == MDBX_LOCKING_POSIX2008 #define MDBX_CLOCK_SIGN UINT32_C(0x8017) typedef pthread_mutex_t mdbx_ipclock_t; #elif MDBX_LOCKING == MDBX_LOCKING_POSIX1988 #define MDBX_CLOCK_SIGN UINT32_C(0xFC29) typedef sem_t mdbx_ipclock_t; #else #error "FIXME" #endif /* MDBX_LOCKING */ #if MDBX_LOCKING > MDBX_LOCKING_SYSV && !defined(__cplusplus) MDBX_INTERNAL_FUNC int mdbx_ipclock_stub(mdbx_ipclock_t *ipc); MDBX_INTERNAL_FUNC int mdbx_ipclock_destroy(mdbx_ipclock_t *ipc); #endif /* MDBX_LOCKING */ /* Reader Lock Table * * Readers don't acquire any locks for their data access. Instead, they * simply record their transaction ID in the reader table. The reader * mutex is needed just to find an empty slot in the reader table. The * slot's address is saved in thread-specific data so that subsequent * read transactions started by the same thread need no further locking to * proceed. * * If MDBX_NOTLS is set, the slot address is not saved in thread-specific data. * No reader table is used if the database is on a read-only filesystem. * * Since the database uses multi-version concurrency control, readers don't * actually need any locking. This table is used to keep track of which * readers are using data from which old transactions, so that we'll know * when a particular old transaction is no longer in use. Old transactions * that have discarded any data pages can then have those pages reclaimed * for use by a later write transaction. * * The lock table is constructed such that reader slots are aligned with the * processor's cache line size. Any slot is only ever used by one thread. * This alignment guarantees that there will be no contention or cache * thrashing as threads update their own slot info, and also eliminates * any need for locking when accessing a slot. * * A writer thread will scan every slot in the table to determine the oldest * outstanding reader transaction. Any freed pages older than this will be * reclaimed by the writer. The writer doesn't use any locks when scanning * this table. This means that there's no guarantee that the writer will * see the most up-to-date reader info, but that's not required for correct * operation - all we need is to know the upper bound on the oldest reader, * we don't care at all about the newest reader. So the only consequence of * reading stale information here is that old pages might hang around a * while longer before being reclaimed. That's actually good anyway, because * the longer we delay reclaiming old pages, the more likely it is that a * string of contiguous pages can be found after coalescing old pages from * many old transactions together. */ /* The actual reader record, with cacheline padding. */ typedef struct MDBX_reader { /* Current Transaction ID when this transaction began, or (txnid_t)-1. * Multiple readers that start at the same time will probably have the * same ID here. Again, it's not important to exclude them from * anything; all we need to know is which version of the DB they * started from so we can avoid overwriting any data used in that * particular version. */ MDBX_atomic_uint64_t /* txnid_t */ mr_txnid; /* The information we store in a single slot of the reader table. * In addition to a transaction ID, we also record the process and * thread ID that owns a slot, so that we can detect stale information, * e.g. threads or processes that went away without cleaning up. * * NOTE: We currently don't check for stale records. * We simply re-init the table when we know that we're the only process * opening the lock file. */ /* The thread ID of the thread owning this txn. */ MDBX_atomic_uint64_t mr_tid; /* The process ID of the process owning this reader txn. */ MDBX_atomic_uint32_t mr_pid; /* The number of pages used in the reader's MVCC snapshot, * i.e. the value of meta->mm_geo.next and txn->mt_next_pgno */ atomic_pgno_t mr_snapshot_pages_used; /* Number of retired pages at the time this reader starts transaction. So, * at any time the difference mm_pages_retired - mr_snapshot_pages_retired * will give the number of pages which this reader restraining from reuse. */ MDBX_atomic_uint64_t mr_snapshot_pages_retired; } MDBX_reader; /* The header for the reader table (a memory-mapped lock file). */ typedef struct MDBX_lockinfo { /* Stamp identifying this as an MDBX file. * It must be set to MDBX_MAGIC with with MDBX_LOCK_VERSION. */ uint64_t mti_magic_and_version; /* Format of this lock file. Must be set to MDBX_LOCK_FORMAT. */ uint32_t mti_os_and_format; /* Flags which environment was opened. */ MDBX_atomic_uint32_t mti_envmode; /* Threshold of un-synced-with-disk pages for auto-sync feature, * zero means no-threshold, i.e. auto-sync is disabled. */ atomic_pgno_t mti_autosync_threshold; /* Low 32-bit of txnid with which meta-pages was synced, * i.e. for sync-polling in the MDBX_NOMETASYNC mode. */ MDBX_atomic_uint32_t mti_meta_sync_txnid; /* Period for timed auto-sync feature, i.e. at the every steady checkpoint * the mti_unsynced_timeout sets to the current_time + mti_autosync_period. * The time value is represented in a suitable system-dependent form, for * example clock_gettime(CLOCK_BOOTTIME) or clock_gettime(CLOCK_MONOTONIC). * Zero means timed auto-sync is disabled. */ MDBX_atomic_uint64_t mti_autosync_period; /* Marker to distinguish uniqueness of DB/CLK. */ MDBX_atomic_uint64_t mti_bait_uniqueness; alignas(MDBX_CACHELINE_SIZE) /* cacheline ---------------------------------*/ #if MDBX_ENABLE_PGOP_STAT /* Statistics of costly ops of all (running, completed and aborted) * transactions */ MDBX_pgop_stat_t mti_pgop_stat; #endif /* MDBX_ENABLE_PGOP_STAT*/ alignas(MDBX_CACHELINE_SIZE) /* cacheline ---------------------------------*/ /* Write transaction lock. */ #if MDBX_LOCKING > 0 mdbx_ipclock_t mti_wlock; #endif /* MDBX_LOCKING > 0 */ atomic_txnid_t mti_oldest_reader; /* Timestamp of the last steady sync. Value is represented in a suitable * system-dependent form, for example clock_gettime(CLOCK_BOOTTIME) or * clock_gettime(CLOCK_MONOTONIC). */ MDBX_atomic_uint64_t mti_sync_timestamp; /* Number un-synced-with-disk pages for auto-sync feature. */ atomic_pgno_t mti_unsynced_pages; /* Number of page which was discarded last time by madvise(MADV_FREE). */ atomic_pgno_t mti_discarded_tail; /* Timestamp of the last readers check. */ MDBX_atomic_uint64_t mti_reader_check_timestamp; /* Shared anchor for tracking readahead edge and enabled/disabled status. */ pgno_t mti_readahead_anchor; alignas(MDBX_CACHELINE_SIZE) /* cacheline ---------------------------------*/ /* Readeaders registration lock. */ #if MDBX_LOCKING > 0 mdbx_ipclock_t mti_rlock; #endif /* MDBX_LOCKING > 0 */ /* The number of slots that have been used in the reader table. * This always records the maximum count, it is not decremented * when readers release their slots. */ MDBX_atomic_uint32_t mti_numreaders; MDBX_atomic_uint32_t mti_readers_refresh_flag; #if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || \ (!defined(__cplusplus) && defined(_MSC_VER)) alignas(MDBX_CACHELINE_SIZE) /* cacheline ---------------------------------*/ MDBX_reader mti_readers[] /* dynamic size */; #endif /* C99 */ } MDBX_lockinfo; /* Lockfile format signature: version, features and field layout */ #define MDBX_LOCK_FORMAT \ (MDBX_CLOCK_SIGN * 27733 + (unsigned)sizeof(MDBX_reader) * 13 + \ (unsigned)offsetof(MDBX_reader, mr_snapshot_pages_used) * 251 + \ (unsigned)offsetof(MDBX_lockinfo, mti_oldest_reader) * 83 + \ (unsigned)offsetof(MDBX_lockinfo, mti_numreaders) * 37 + \ (unsigned)offsetof(MDBX_lockinfo, mti_readers) * 29) #define MDBX_DATA_MAGIC \ ((MDBX_MAGIC << 8) + MDBX_PNL_ASCENDING * 64 + MDBX_DATA_VERSION) #define MDBX_DATA_MAGIC_LEGACY_COMPAT \ ((MDBX_MAGIC << 8) + MDBX_PNL_ASCENDING * 64 + 2) #define MDBX_DATA_MAGIC_LEGACY_DEVEL ((MDBX_MAGIC << 8) + 255) #define MDBX_LOCK_MAGIC ((MDBX_MAGIC << 8) + MDBX_LOCK_VERSION) /* The maximum size of a database page. * * It is 64K, but value-PAGEHDRSZ must fit in MDBX_page.mp_upper. * * MDBX will use database pages < OS pages if needed. * That causes more I/O in write transactions: The OS must * know (read) the whole page before writing a partial page. * * Note that we don't currently support Huge pages. On Linux, * regular data files cannot use Huge pages, and in general * Huge pages aren't actually pageable. We rely on the OS * demand-pager to read our data and page it out when memory * pressure from other processes is high. So until OSs have * actual paging support for Huge pages, they're not viable. */ #define MAX_PAGESIZE MDBX_MAX_PAGESIZE #define MIN_PAGESIZE MDBX_MIN_PAGESIZE #define MIN_MAPSIZE (MIN_PAGESIZE * MIN_PAGENO) #if defined(_WIN32) || defined(_WIN64) #define MAX_MAPSIZE32 UINT32_C(0x38000000) #else #define MAX_MAPSIZE32 UINT32_C(0x7f000000) #endif #define MAX_MAPSIZE64 (MAX_PAGENO * (uint64_t)MAX_PAGESIZE) #if MDBX_WORDBITS >= 64 #define MAX_MAPSIZE MAX_MAPSIZE64 #define MDBX_PGL_LIMIT ((size_t)MAX_PAGENO) #else #define MAX_MAPSIZE MAX_MAPSIZE32 #define MDBX_PGL_LIMIT (MAX_MAPSIZE32 / MIN_PAGESIZE) #endif /* MDBX_WORDBITS */ #define MDBX_READERS_LIMIT 32767 #define MDBX_RADIXSORT_THRESHOLD 333 /*----------------------------------------------------------------------------*/ /* An PNL is an Page Number List, a sorted array of IDs. * The first element of the array is a counter for how many actual page-numbers * are in the list. By default PNLs are sorted in descending order, this allow * cut off a page with lowest pgno (at the tail) just truncating the list. The * sort order of PNLs is controlled by the MDBX_PNL_ASCENDING build option. */ typedef pgno_t *MDBX_PNL; #if MDBX_PNL_ASCENDING #define MDBX_PNL_ORDERED(first, last) ((first) < (last)) #define MDBX_PNL_DISORDERED(first, last) ((first) >= (last)) #else #define MDBX_PNL_ORDERED(first, last) ((first) > (last)) #define MDBX_PNL_DISORDERED(first, last) ((first) <= (last)) #endif /* List of txnid, only for MDBX_txn.tw.lifo_reclaimed */ typedef txnid_t *MDBX_TXL; /* An Dirty-Page list item is an pgno/pointer pair. */ typedef struct MDBX_dp { MDBX_page *ptr; pgno_t pgno; union { unsigned extra; __anonymous_struct_extension__ struct { unsigned multi : 1; unsigned lru : 31; }; }; } MDBX_dp; /* An DPL (dirty-page list) is a sorted array of MDBX_DPs. */ typedef struct MDBX_dpl { unsigned sorted; unsigned length; unsigned detent; /* allocated size excluding the MDBX_DPL_RESERVE_GAP */ #if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || \ (!defined(__cplusplus) && defined(_MSC_VER)) MDBX_dp items[] /* dynamic size with holes at zero and after the last */; #endif } MDBX_dpl; /* PNL sizes */ #define MDBX_PNL_GRANULATE 1024 #define MDBX_PNL_INITIAL \ (MDBX_PNL_GRANULATE - 2 - MDBX_ASSUME_MALLOC_OVERHEAD / sizeof(pgno_t)) #define MDBX_TXL_GRANULATE 32 #define MDBX_TXL_INITIAL \ (MDBX_TXL_GRANULATE - 2 - MDBX_ASSUME_MALLOC_OVERHEAD / sizeof(txnid_t)) #define MDBX_TXL_MAX \ ((1u << 17) - 2 - MDBX_ASSUME_MALLOC_OVERHEAD / sizeof(txnid_t)) #define MDBX_PNL_ALLOCLEN(pl) ((pl)[-1]) #define MDBX_PNL_SIZE(pl) ((pl)[0]) #define MDBX_PNL_FIRST(pl) ((pl)[1]) #define MDBX_PNL_LAST(pl) ((pl)[MDBX_PNL_SIZE(pl)]) #define MDBX_PNL_BEGIN(pl) (&(pl)[1]) #define MDBX_PNL_END(pl) (&(pl)[MDBX_PNL_SIZE(pl) + 1]) #if MDBX_PNL_ASCENDING #define MDBX_PNL_LEAST(pl) MDBX_PNL_FIRST(pl) #define MDBX_PNL_MOST(pl) MDBX_PNL_LAST(pl) #else #define MDBX_PNL_LEAST(pl) MDBX_PNL_LAST(pl) #define MDBX_PNL_MOST(pl) MDBX_PNL_FIRST(pl) #endif #define MDBX_PNL_SIZEOF(pl) ((MDBX_PNL_SIZE(pl) + 1) * sizeof(pgno_t)) #define MDBX_PNL_IS_EMPTY(pl) (MDBX_PNL_SIZE(pl) == 0) /*----------------------------------------------------------------------------*/ /* Internal structures */ /* Auxiliary DB info. * The information here is mostly static/read-only. There is * only a single copy of this record in the environment. */ typedef struct MDBX_dbx { MDBX_val md_name; /* name of the database */ MDBX_cmp_func *md_cmp; /* function for comparing keys */ MDBX_cmp_func *md_dcmp; /* function for comparing data items */ size_t md_klen_min, md_klen_max; /* min/max key length for the database */ size_t md_vlen_min, md_vlen_max; /* min/max value/data length for the database */ } MDBX_dbx; /* A database transaction. * Every operation requires a transaction handle. */ struct MDBX_txn { #define MDBX_MT_SIGNATURE UINT32_C(0x93D53A31) uint32_t mt_signature; /* Transaction Flags */ /* mdbx_txn_begin() flags */ #define MDBX_TXN_RO_BEGIN_FLAGS (MDBX_TXN_RDONLY | MDBX_TXN_RDONLY_PREPARE) #define MDBX_TXN_RW_BEGIN_FLAGS \ (MDBX_TXN_NOMETASYNC | MDBX_TXN_NOSYNC | MDBX_TXN_TRY) /* Additional flag for mdbx_sync_locked() */ #define MDBX_SHRINK_ALLOWED UINT32_C(0x40000000) /* internal txn flags */ #define MDBX_TXN_FINISHED 0x01 /* txn is finished or never began */ #define MDBX_TXN_ERROR 0x02 /* txn is unusable after an error */ #define MDBX_TXN_DIRTY 0x04 /* must write, even if dirty list is empty */ #define MDBX_TXN_SPILLS 0x08 /* txn or a parent has spilled pages */ #define MDBX_TXN_HAS_CHILD 0x10 /* txn has an MDBX_txn.mt_child */ /* most operations on the txn are currently illegal */ #define MDBX_TXN_BLOCKED \ (MDBX_TXN_FINISHED | MDBX_TXN_ERROR | MDBX_TXN_HAS_CHILD) #define TXN_FLAGS \ (MDBX_TXN_FINISHED | MDBX_TXN_ERROR | MDBX_TXN_DIRTY | MDBX_TXN_SPILLS | \ MDBX_TXN_HAS_CHILD) #if (TXN_FLAGS & (MDBX_TXN_RW_BEGIN_FLAGS | MDBX_TXN_RO_BEGIN_FLAGS)) || \ ((MDBX_TXN_RW_BEGIN_FLAGS | MDBX_TXN_RO_BEGIN_FLAGS | TXN_FLAGS) & \ MDBX_SHRINK_ALLOWED) #error "Oops, some flags overlapped or wrong" #endif uint32_t mt_flags; MDBX_txn *mt_parent; /* parent of a nested txn */ /* Nested txn under this txn, set together with flag MDBX_TXN_HAS_CHILD */ MDBX_txn *mt_child; MDBX_geo mt_geo; /* next unallocated page */ #define mt_next_pgno mt_geo.next /* corresponding to the current size of datafile */ #define mt_end_pgno mt_geo.now /* The ID of this transaction. IDs are integers incrementing from 1. * Only committed write transactions increment the ID. If a transaction * aborts, the ID may be re-used by the next writer. */ txnid_t mt_txnid; txnid_t mt_front; MDBX_env *mt_env; /* the DB environment */ /* Array of records for each DB known in the environment. */ MDBX_dbx *mt_dbxs; /* Array of MDBX_db records for each known DB */ MDBX_db *mt_dbs; /* Array of sequence numbers for each DB handle */ unsigned *mt_dbiseqs; /* Transaction DBI Flags */ #define DBI_DIRTY MDBX_DBI_DIRTY /* DB was written in this txn */ #define DBI_STALE MDBX_DBI_STALE /* Named-DB record is older than txnID */ #define DBI_FRESH MDBX_DBI_FRESH /* Named-DB handle opened in this txn */ #define DBI_CREAT MDBX_DBI_CREAT /* Named-DB handle created in this txn */ #define DBI_VALID 0x10 /* DB handle is valid, see also DB_VALID */ #define DBI_USRVALID 0x20 /* As DB_VALID, but not set for FREE_DBI */ #define DBI_AUDITED 0x40 /* Internal flag for accounting during audit */ /* Array of flags for each DB */ uint8_t *mt_dbistate; /* Number of DB records in use, or 0 when the txn is finished. * This number only ever increments until the txn finishes; we * don't decrement it when individual DB handles are closed. */ MDBX_dbi mt_numdbs; size_t mt_owner; /* thread ID that owns this transaction */ MDBX_canary mt_canary; void *mt_userctx; /* User-settable context */ union { struct { /* For read txns: This thread/txn's reader table slot, or NULL. */ MDBX_reader *reader; } to; struct { /* In write txns, array of cursors for each DB */ MDBX_cursor **cursors; pgno_t *reclaimed_pglist; /* Reclaimed GC pages */ txnid_t last_reclaimed; /* ID of last used record */ #if MDBX_ENABLE_REFUND pgno_t loose_refund_wl /* FIXME: describe */; #endif /* MDBX_ENABLE_REFUND */ /* dirtylist room: Dirty array size - dirty pages visible to this txn. * Includes ancestor txns' dirty pages not hidden by other txns' * dirty/spilled pages. Thus commit(nested txn) has room to merge * dirtylist into mt_parent after freeing hidden mt_parent pages. */ unsigned dirtyroom; /* a sequence to spilling dirty page with LRU policy */ unsigned dirtylru; /* For write txns: Modified pages. Sorted when not MDBX_WRITEMAP. */ MDBX_dpl *dirtylist; /* The list of reclaimed txns from GC */ MDBX_TXL lifo_reclaimed; /* The list of pages that became unused during this transaction. */ MDBX_PNL retired_pages; /* The list of loose pages that became unused and may be reused * in this transaction, linked through `mp_next`. */ MDBX_page *loose_pages; /* Number of loose pages (tw.loose_pages) */ unsigned loose_count; /* The sorted list of dirty pages we temporarily wrote to disk * because the dirty list was full. page numbers in here are * shifted left by 1, deleted slots have the LSB set. */ MDBX_PNL spill_pages; unsigned spill_least_removed; } tw; }; }; #if MDBX_WORDBITS >= 64 #define CURSOR_STACK 32 #else #define CURSOR_STACK 24 #endif struct MDBX_xcursor; /* Cursors are used for all DB operations. * A cursor holds a path of (page pointer, key index) from the DB * root to a position in the DB, plus other state. MDBX_DUPSORT * cursors include an xcursor to the current data item. Write txns * track their cursors and keep them up to date when data moves. * Exception: An xcursor's pointer to a P_SUBP page can be stale. * (A node with F_DUPDATA but no F_SUBDATA contains a subpage). */ struct MDBX_cursor { #define MDBX_MC_LIVE UINT32_C(0xFE05D5B1) #define MDBX_MC_READY4CLOSE UINT32_C(0x2817A047) #define MDBX_MC_WAIT4EOT UINT32_C(0x90E297A7) uint32_t mc_signature; /* The database handle this cursor operates on */ MDBX_dbi mc_dbi; /* Next cursor on this DB in this txn */ MDBX_cursor *mc_next; /* Backup of the original cursor if this cursor is a shadow */ MDBX_cursor *mc_backup; /* Context used for databases with MDBX_DUPSORT, otherwise NULL */ struct MDBX_xcursor *mc_xcursor; /* The transaction that owns this cursor */ MDBX_txn *mc_txn; /* The database record for this cursor */ MDBX_db *mc_db; /* The database auxiliary record for this cursor */ MDBX_dbx *mc_dbx; /* The mt_dbistate for this database */ uint8_t *mc_dbistate; unsigned mc_snum; /* number of pushed pages */ unsigned mc_top; /* index of top page, normally mc_snum-1 */ /* Cursor state flags. */ #define C_INITIALIZED 0x01 /* cursor has been initialized and is valid */ #define C_EOF 0x02 /* No more data */ #define C_SUB 0x04 /* Cursor is a sub-cursor */ #define C_DEL 0x08 /* last op was a cursor_del */ #define C_UNTRACK 0x10 /* Un-track cursor when closing */ #define C_RECLAIMING 0x20 /* GC lookup is prohibited */ #define C_GCFREEZE 0x40 /* reclaimed_pglist must not be updated */ /* Cursor checking flags. */ #define C_COPYING 0x100 /* skip key-value length check (copying simplify) */ #define C_UPDATING 0x200 /* update/rebalance pending */ #define C_RETIRING 0x400 /* refs to child pages may be invalid */ #define C_SKIPORD 0x800 /* don't check keys ordering */ unsigned mc_flags; /* see mdbx_cursor */ MDBX_page *mc_pg[CURSOR_STACK]; /* stack of pushed pages */ indx_t mc_ki[CURSOR_STACK]; /* stack of page indices */ }; /* Context for sorted-dup records. * We could have gone to a fully recursive design, with arbitrarily * deep nesting of sub-databases. But for now we only handle these * levels - main DB, optional sub-DB, sorted-duplicate DB. */ typedef struct MDBX_xcursor { /* A sub-cursor for traversing the Dup DB */ MDBX_cursor mx_cursor; /* The database record for this Dup DB */ MDBX_db mx_db; /* The auxiliary DB record for this Dup DB */ MDBX_dbx mx_dbx; } MDBX_xcursor; typedef struct MDBX_cursor_couple { MDBX_cursor outer; void *mc_userctx; /* User-settable context */ MDBX_xcursor inner; } MDBX_cursor_couple; /* The database environment. */ struct MDBX_env { /* ----------------------------------------------------- mostly static part */ #define MDBX_ME_SIGNATURE UINT32_C(0x9A899641) MDBX_atomic_uint32_t me_signature; /* Failed to update the meta page. Probably an I/O error. */ #define MDBX_FATAL_ERROR UINT32_C(0x80000000) /* Some fields are initialized. */ #define MDBX_ENV_ACTIVE UINT32_C(0x20000000) /* me_txkey is set */ #define MDBX_ENV_TXKEY UINT32_C(0x10000000) /* Legacy MDBX_MAPASYNC (prior v0.9) */ #define MDBX_DEPRECATED_MAPASYNC UINT32_C(0x100000) #define ENV_INTERNAL_FLAGS (MDBX_FATAL_ERROR | MDBX_ENV_ACTIVE | MDBX_ENV_TXKEY) uint32_t me_flags; mdbx_mmap_t me_dxb_mmap; /* The main data file */ #define me_map me_dxb_mmap.dxb #define me_lazy_fd me_dxb_mmap.fd mdbx_filehandle_t me_dsync_fd; mdbx_mmap_t me_lck_mmap; /* The lock file */ #define me_lfd me_lck_mmap.fd struct MDBX_lockinfo *me_lck; unsigned me_psize; /* DB page size, initialized from me_os_psize */ unsigned me_leaf_nodemax; /* max size of a leaf-node */ uint8_t me_psize2log; /* log2 of DB page size */ int8_t me_stuck_meta; /* recovery-only: target meta page or less that zero */ uint16_t me_merge_threshold, me_merge_threshold_gc; /* pages emptier than this are candidates for merging */ unsigned me_os_psize; /* OS page size, from mdbx_syspagesize() */ unsigned me_maxreaders; /* size of the reader table */ MDBX_dbi me_maxdbs; /* size of the DB table */ uint32_t me_pid; /* process ID of this env */ mdbx_thread_key_t me_txkey; /* thread-key for readers */ char *me_pathname; /* path to the DB files */ void *me_pbuf; /* scratch area for DUPSORT put() */ MDBX_txn *me_txn0; /* preallocated write transaction */ MDBX_dbx *me_dbxs; /* array of static DB info */ uint16_t *me_dbflags; /* array of flags from MDBX_db.md_flags */ unsigned *me_dbiseqs; /* array of dbi sequence numbers */ unsigned me_maxgc_ov1page; /* Number of pgno_t fit in a single overflow page */ uint32_t me_live_reader; /* have liveness lock in reader table */ void *me_userctx; /* User-settable context */ MDBX_hsr_func *me_hsr_callback; /* Callback for kicking laggard readers */ struct { unsigned dp_reserve_limit; unsigned rp_augment_limit; unsigned dp_limit; unsigned dp_initial; uint8_t dp_loose_limit; uint8_t spill_max_denominator; uint8_t spill_min_denominator; uint8_t spill_parent4child_denominator; unsigned merge_threshold_16dot16_percent; union { unsigned all; /* tracks options with non-auto values but tuned by user */ struct { unsigned dp_limit : 1; } non_auto; } flags; } me_options; /* struct me_dbgeo used for accepting db-geo params from user for the new * database creation, i.e. when mdbx_env_set_geometry() was called before * mdbx_env_open(). */ struct { size_t lower; /* minimal size of datafile */ size_t upper; /* maximal size of datafile */ size_t now; /* current size of datafile */ size_t grow; /* step to grow datafile */ size_t shrink; /* threshold to shrink datafile */ } me_dbgeo; #if MDBX_LOCKING == MDBX_LOCKING_SYSV union { key_t key; int semid; } me_sysv_ipc; #endif /* MDBX_LOCKING == MDBX_LOCKING_SYSV */ MDBX_env *me_lcklist_next; /* --------------------------------------------------- mostly volatile part */ MDBX_txn *me_txn; /* current write transaction */ mdbx_fastmutex_t me_dbi_lock; MDBX_dbi me_numdbs; /* number of DBs opened */ MDBX_page *me_dp_reserve; /* list of malloc'ed blocks for re-use */ unsigned me_dp_reserve_len; /* PNL of pages that became unused in a write txn */ MDBX_PNL me_retired_pages; #if defined(_WIN32) || defined(_WIN64) MDBX_srwlock me_remap_guard; /* Workaround for LockFileEx and WriteFile multithread bug */ CRITICAL_SECTION me_windowsbug_lock; #else mdbx_fastmutex_t me_remap_guard; #endif /* -------------------------------------------------------------- debugging */ #if MDBX_DEBUG MDBX_assert_func *me_assert_func; /* Callback for assertion failures */ #endif #ifdef MDBX_USE_VALGRIND int me_valgrind_handle; #endif #if defined(MDBX_USE_VALGRIND) || defined(__SANITIZE_ADDRESS__) pgno_t me_poison_edge; #endif /* MDBX_USE_VALGRIND || __SANITIZE_ADDRESS__ */ #ifndef xMDBX_DEBUG_SPILLING #define xMDBX_DEBUG_SPILLING 0 #endif #if xMDBX_DEBUG_SPILLING == 2 unsigned debug_dirtied_est, debug_dirtied_act; #endif /* xMDBX_DEBUG_SPILLING */ /* ------------------------------------------------- stub for lck-less mode */ MDBX_atomic_uint64_t x_lckless_stub[(sizeof(MDBX_lockinfo) + MDBX_CACHELINE_SIZE - 1) / sizeof(MDBX_atomic_uint64_t)]; }; #ifndef __cplusplus /*----------------------------------------------------------------------------*/ /* Debug and Logging stuff */ #define MDBX_RUNTIME_FLAGS_INIT \ ((MDBX_DEBUG) > 0) * MDBX_DBG_ASSERT + ((MDBX_DEBUG) > 1) * MDBX_DBG_AUDIT extern uint8_t mdbx_runtime_flags; extern uint8_t mdbx_loglevel; extern MDBX_debug_func *mdbx_debug_logger; MDBX_MAYBE_UNUSED static __inline void mdbx_jitter4testing(bool tiny) { #if MDBX_DEBUG if (MDBX_DBG_JITTER & mdbx_runtime_flags) mdbx_osal_jitter(tiny); #else (void)tiny; #endif } MDBX_INTERNAL_FUNC void MDBX_PRINTF_ARGS(4, 5) mdbx_debug_log(int level, const char *function, int line, const char *fmt, ...) MDBX_PRINTF_ARGS(4, 5); MDBX_INTERNAL_FUNC void mdbx_debug_log_va(int level, const char *function, int line, const char *fmt, va_list args); #define mdbx_log_enabled(msg) unlikely(msg <= mdbx_loglevel) #if MDBX_DEBUG #define mdbx_assert_enabled() unlikely(mdbx_runtime_flags &MDBX_DBG_ASSERT) #define mdbx_audit_enabled() unlikely(mdbx_runtime_flags &MDBX_DBG_AUDIT) #else /* MDBX_DEBUG */ #define mdbx_audit_enabled() (0) #if !defined(NDEBUG) || MDBX_FORCE_ASSERTIONS #define mdbx_assert_enabled() (1) #else #define mdbx_assert_enabled() (0) #endif /* NDEBUG */ #endif /* MDBX_DEBUG */ #if !MDBX_DEBUG && defined(__ANDROID_API__) #define mdbx_assert_fail(env, msg, func, line) \ __android_log_assert(msg, "mdbx", "%s:%u", func, line) #else void mdbx_assert_fail(const MDBX_env *env, const char *msg, const char *func, int line); #endif #define mdbx_debug_extra(fmt, ...) \ do { \ if (MDBX_DEBUG && mdbx_log_enabled(MDBX_LOG_EXTRA)) \ mdbx_debug_log(MDBX_LOG_EXTRA, __func__, __LINE__, fmt, __VA_ARGS__); \ } while (0) #define mdbx_debug_extra_print(fmt, ...) \ do { \ if (MDBX_DEBUG && mdbx_log_enabled(MDBX_LOG_EXTRA)) \ mdbx_debug_log(MDBX_LOG_EXTRA, NULL, 0, fmt, __VA_ARGS__); \ } while (0) #define mdbx_trace(fmt, ...) \ do { \ if (MDBX_DEBUG && mdbx_log_enabled(MDBX_LOG_TRACE)) \ mdbx_debug_log(MDBX_LOG_TRACE, __func__, __LINE__, fmt "\n", \ __VA_ARGS__); \ } while (0) #define mdbx_debug(fmt, ...) \ do { \ if (MDBX_DEBUG && mdbx_log_enabled(MDBX_LOG_DEBUG)) \ mdbx_debug_log(MDBX_LOG_DEBUG, __func__, __LINE__, fmt "\n", \ __VA_ARGS__); \ } while (0) #define mdbx_verbose(fmt, ...) \ do { \ if (MDBX_DEBUG && mdbx_log_enabled(MDBX_LOG_VERBOSE)) \ mdbx_debug_log(MDBX_LOG_VERBOSE, __func__, __LINE__, fmt "\n", \ __VA_ARGS__); \ } while (0) #define mdbx_notice(fmt, ...) \ do { \ if (mdbx_log_enabled(MDBX_LOG_NOTICE)) \ mdbx_debug_log(MDBX_LOG_NOTICE, __func__, __LINE__, fmt "\n", \ __VA_ARGS__); \ } while (0) #define mdbx_warning(fmt, ...) \ do { \ if (mdbx_log_enabled(MDBX_LOG_WARN)) \ mdbx_debug_log(MDBX_LOG_WARN, __func__, __LINE__, fmt "\n", \ __VA_ARGS__); \ } while (0) #define mdbx_error(fmt, ...) \ do { \ if (mdbx_log_enabled(MDBX_LOG_ERROR)) \ mdbx_debug_log(MDBX_LOG_ERROR, __func__, __LINE__, fmt "\n", \ __VA_ARGS__); \ } while (0) #define mdbx_fatal(fmt, ...) \ mdbx_debug_log(MDBX_LOG_FATAL, __func__, __LINE__, fmt "\n", __VA_ARGS__); #define mdbx_ensure_msg(env, expr, msg) \ do { \ if (unlikely(!(expr))) \ mdbx_assert_fail(env, msg, __func__, __LINE__); \ } while (0) #define mdbx_ensure(env, expr) mdbx_ensure_msg(env, expr, #expr) /* assert(3) variant in environment context */ #define mdbx_assert(env, expr) \ do { \ if (mdbx_assert_enabled()) \ mdbx_ensure(env, expr); \ } while (0) /* assert(3) variant in cursor context */ #define mdbx_cassert(mc, expr) mdbx_assert((mc)->mc_txn->mt_env, expr) /* assert(3) variant in transaction context */ #define mdbx_tassert(txn, expr) mdbx_assert((txn)->mt_env, expr) #ifndef xMDBX_TOOLS /* Avoid using internal mdbx_assert() */ #undef assert #define assert(expr) mdbx_assert(NULL, expr) #endif /*----------------------------------------------------------------------------*/ /* Cache coherence and mmap invalidation */ #if MDBX_CPU_WRITEBACK_INCOHERENT #define mdbx_flush_incoherent_cpu_writeback() mdbx_memory_barrier() #else #define mdbx_flush_incoherent_cpu_writeback() mdbx_compiler_barrier() #endif /* MDBX_CPU_WRITEBACK_INCOHERENT */ MDBX_MAYBE_UNUSED static __inline void mdbx_flush_incoherent_mmap(void *addr, size_t nbytes, const intptr_t pagesize) { #if MDBX_MMAP_INCOHERENT_FILE_WRITE char *const begin = (char *)(-pagesize & (intptr_t)addr); char *const end = (char *)(-pagesize & (intptr_t)((char *)addr + nbytes + pagesize - 1)); int err = msync(begin, end - begin, MS_SYNC | MS_INVALIDATE) ? errno : 0; mdbx_assert(nullptr, err == 0); (void)err; #else (void)pagesize; #endif /* MDBX_MMAP_INCOHERENT_FILE_WRITE */ #if MDBX_MMAP_INCOHERENT_CPU_CACHE #ifdef DCACHE /* MIPS has cache coherency issues. * Note: for any nbytes >= on-chip cache size, entire is flushed. */ cacheflush(addr, nbytes, DCACHE); #else #error "Oops, cacheflush() not available" #endif /* DCACHE */ #endif /* MDBX_MMAP_INCOHERENT_CPU_CACHE */ #if !MDBX_MMAP_INCOHERENT_FILE_WRITE && !MDBX_MMAP_INCOHERENT_CPU_CACHE (void)addr; (void)nbytes; #endif } /*----------------------------------------------------------------------------*/ /* Internal prototypes */ MDBX_INTERNAL_FUNC int mdbx_cleanup_dead_readers(MDBX_env *env, int rlocked, int *dead); MDBX_INTERNAL_FUNC int mdbx_rthc_alloc(mdbx_thread_key_t *key, MDBX_reader *begin, MDBX_reader *end); MDBX_INTERNAL_FUNC void mdbx_rthc_remove(const mdbx_thread_key_t key); MDBX_INTERNAL_FUNC void mdbx_rthc_global_init(void); MDBX_INTERNAL_FUNC void mdbx_rthc_global_dtor(void); MDBX_INTERNAL_FUNC void mdbx_rthc_thread_dtor(void *ptr); #endif /* !__cplusplus */ #define MDBX_IS_ERROR(rc) \ ((rc) != MDBX_RESULT_TRUE && (rc) != MDBX_RESULT_FALSE) /* Internal error codes, not exposed outside libmdbx */ #define MDBX_NO_ROOT (MDBX_LAST_ADDED_ERRCODE + 10) /* Debugging output value of a cursor DBI: Negative in a sub-cursor. */ #define DDBI(mc) \ (((mc)->mc_flags & C_SUB) ? -(int)(mc)->mc_dbi : (int)(mc)->mc_dbi) /* Key size which fits in a DKBUF (debug key buffer). */ #define DKBUF_MAX 511 #define DKBUF char _kbuf[DKBUF_MAX * 4 + 2] #define DKEY(x) mdbx_dump_val(x, _kbuf, DKBUF_MAX * 2 + 1) #define DVAL(x) mdbx_dump_val(x, _kbuf + DKBUF_MAX * 2 + 1, DKBUF_MAX * 2 + 1) #if MDBX_DEBUG #define DKBUF_DEBUG DKBUF #define DKEY_DEBUG(x) DKEY(x) #define DVAL_DEBUG(x) DVAL(x) #else #define DKBUF_DEBUG ((void)(0)) #define DKEY_DEBUG(x) ("-") #define DVAL_DEBUG(x) ("-") #endif /* An invalid page number. * Mainly used to denote an empty tree. */ #define P_INVALID (~(pgno_t)0) /* Test if the flags f are set in a flag word w. */ #define F_ISSET(w, f) (((w) & (f)) == (f)) /* Round n up to an even number. */ #define EVEN(n) (((n) + 1U) & -2) /* sign-extending -2 to match n+1U */ /* Default size of memory map. * This is certainly too small for any actual applications. Apps should * always set the size explicitly using mdbx_env_set_geometry(). */ #define DEFAULT_MAPSIZE MEGABYTE /* Number of slots in the reader table. * This value was chosen somewhat arbitrarily. The 61 is a prime number, * and such readers plus a couple mutexes fit into single 4KB page. * Applications should set the table size using mdbx_env_set_maxreaders(). */ #define DEFAULT_READERS 61 /* Test if a page is a leaf page */ #define IS_LEAF(p) (((p)->mp_flags & P_LEAF) != 0) /* Test if a page is a LEAF2 page */ #define IS_LEAF2(p) unlikely(((p)->mp_flags & P_LEAF2) != 0) /* Test if a page is a branch page */ #define IS_BRANCH(p) (((p)->mp_flags & P_BRANCH) != 0) /* Test if a page is an overflow page */ #define IS_OVERFLOW(p) unlikely(((p)->mp_flags & P_OVERFLOW) != 0) /* Test if a page is a sub page */ #define IS_SUBP(p) (((p)->mp_flags & P_SUBP) != 0) #define PAGETYPE(p) ((p)->mp_flags & (P_BRANCH | P_LEAF | P_LEAF2 | P_OVERFLOW)) /* Header for a single key/data pair within a page. * Used in pages of type P_BRANCH and P_LEAF without P_LEAF2. * We guarantee 2-byte alignment for 'MDBX_node's. * * Leaf node flags describe node contents. F_BIGDATA says the node's * data part is the page number of an overflow page with actual data. * F_DUPDATA and F_SUBDATA can be combined giving duplicate data in * a sub-page/sub-database, and named databases (just F_SUBDATA). */ typedef struct MDBX_node { #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ union { uint32_t mn_dsize; uint32_t mn_pgno32; }; uint8_t mn_flags; /* see mdbx_node flags */ uint8_t mn_extra; uint16_t mn_ksize; /* key size */ #else uint16_t mn_ksize; /* key size */ uint8_t mn_extra; uint8_t mn_flags; /* see mdbx_node flags */ union { uint32_t mn_pgno32; uint32_t mn_dsize; }; #endif /* __BYTE_ORDER__ */ /* mdbx_node Flags */ #define F_BIGDATA 0x01 /* data put on overflow page */ #define F_SUBDATA 0x02 /* data is a sub-database */ #define F_DUPDATA 0x04 /* data has duplicates */ /* valid flags for mdbx_node_add() */ #define NODE_ADD_FLAGS (F_DUPDATA | F_SUBDATA | MDBX_RESERVE | MDBX_APPEND) #if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || \ (!defined(__cplusplus) && defined(_MSC_VER)) uint8_t mn_data[] /* key and data are appended here */; #endif /* C99 */ } MDBX_node; #define DB_PERSISTENT_FLAGS \ (MDBX_REVERSEKEY | MDBX_DUPSORT | MDBX_INTEGERKEY | MDBX_DUPFIXED | \ MDBX_INTEGERDUP | MDBX_REVERSEDUP) /* mdbx_dbi_open() flags */ #define DB_USABLE_FLAGS (DB_PERSISTENT_FLAGS | MDBX_CREATE | MDBX_DB_ACCEDE) #define DB_VALID 0x8000 /* DB handle is valid, for me_dbflags */ #define DB_INTERNAL_FLAGS DB_VALID #if DB_INTERNAL_FLAGS & DB_USABLE_FLAGS #error "Oops, some flags overlapped or wrong" #endif #if DB_PERSISTENT_FLAGS & ~DB_USABLE_FLAGS #error "Oops, some flags overlapped or wrong" #endif /* max number of pages to commit in one writev() call */ #define MDBX_COMMIT_PAGES 64 #if defined(IOV_MAX) && IOV_MAX < MDBX_COMMIT_PAGES /* sysconf(_SC_IOV_MAX) */ #undef MDBX_COMMIT_PAGES #define MDBX_COMMIT_PAGES IOV_MAX #endif /* * / * | -1, a < b * CMP2INT(a,b) = < 0, a == b * | 1, a > b * \ */ #ifndef __e2k__ /* LY: fast enough on most systems */ #define CMP2INT(a, b) (((b) > (a)) ? -1 : (a) > (b)) #else /* LY: more parallelable on VLIW Elbrus */ #define CMP2INT(a, b) (((a) > (b)) - ((b) > (a))) #endif /* Do not spill pages to disk if txn is getting full, may fail instead */ #define MDBX_NOSPILL 0x8000 MDBX_MAYBE_UNUSED MDBX_NOTHROW_CONST_FUNCTION static __inline pgno_t pgno_add(pgno_t base, pgno_t augend) { assert(base <= MAX_PAGENO); return (augend < MAX_PAGENO - base) ? base + augend : MAX_PAGENO; } MDBX_MAYBE_UNUSED MDBX_NOTHROW_CONST_FUNCTION static __inline pgno_t pgno_sub(pgno_t base, pgno_t subtrahend) { assert(base >= MIN_PAGENO); return (subtrahend < base - MIN_PAGENO) ? base - subtrahend : MIN_PAGENO; } MDBX_MAYBE_UNUSED MDBX_NOTHROW_CONST_FUNCTION static __always_inline bool is_powerof2(size_t x) { return (x & (x - 1)) == 0; } MDBX_MAYBE_UNUSED MDBX_NOTHROW_CONST_FUNCTION static __always_inline size_t floor_powerof2(size_t value, size_t granularity) { assert(is_powerof2(granularity)); return value & ~(granularity - 1); } MDBX_MAYBE_UNUSED MDBX_NOTHROW_CONST_FUNCTION static __always_inline size_t ceil_powerof2(size_t value, size_t granularity) { return floor_powerof2(value + granularity - 1, granularity); } MDBX_MAYBE_UNUSED MDBX_NOTHROW_CONST_FUNCTION static unsigned log2n_powerof2(size_t value) { assert(value > 0 && value < INT32_MAX && is_powerof2(value)); assert((value & -(int32_t)value) == value); #if __GNUC_PREREQ(4, 1) || __has_builtin(__builtin_ctzl) return __builtin_ctzl(value); #elif defined(_MSC_VER) unsigned long index; _BitScanForward(&index, (unsigned long)value); return index; #else static const uint8_t debruijn_ctz32[32] = { 0, 1, 28, 2, 29, 14, 24, 3, 30, 22, 20, 15, 25, 17, 4, 8, 31, 27, 13, 23, 21, 19, 16, 7, 26, 12, 18, 6, 11, 5, 10, 9}; return debruijn_ctz32[(uint32_t)(value * 0x077CB531u) >> 27]; #endif } /* Only a subset of the mdbx_env flags can be changed * at runtime. Changing other flags requires closing the * environment and re-opening it with the new flags. */ #define ENV_CHANGEABLE_FLAGS \ (MDBX_SAFE_NOSYNC | MDBX_NOMETASYNC | MDBX_DEPRECATED_MAPASYNC | \ MDBX_NOMEMINIT | MDBX_COALESCE | MDBX_PAGEPERTURB | MDBX_ACCEDE) #define ENV_CHANGELESS_FLAGS \ (MDBX_NOSUBDIR | MDBX_RDONLY | MDBX_WRITEMAP | MDBX_NOTLS | MDBX_NORDAHEAD | \ MDBX_LIFORECLAIM | MDBX_EXCLUSIVE) #define ENV_USABLE_FLAGS (ENV_CHANGEABLE_FLAGS | ENV_CHANGELESS_FLAGS) #if !defined(__cplusplus) || CONSTEXPR_ENUM_FLAGS_OPERATIONS MDBX_MAYBE_UNUSED static void static_checks(void) { STATIC_ASSERT_MSG(INT16_MAX - CORE_DBS == MDBX_MAX_DBI, "Oops, MDBX_MAX_DBI or CORE_DBS?"); STATIC_ASSERT_MSG((unsigned)(MDBX_DB_ACCEDE | MDBX_CREATE) == ((DB_USABLE_FLAGS | DB_INTERNAL_FLAGS) & (ENV_USABLE_FLAGS | ENV_INTERNAL_FLAGS)), "Oops, some flags overlapped or wrong"); STATIC_ASSERT_MSG((ENV_INTERNAL_FLAGS & ENV_USABLE_FLAGS) == 0, "Oops, some flags overlapped or wrong"); } #endif /* Disabled for MSVC 19.0 (VisualStudio 2015) */ #ifdef __cplusplus } #endif #define MDBX_ASAN_POISON_MEMORY_REGION(addr, size) \ do { \ mdbx_trace("POISON_MEMORY_REGION(%p, %zu) at %u", (void *)(addr), \ (size_t)(size), __LINE__); \ ASAN_POISON_MEMORY_REGION(addr, size); \ } while (0) #define MDBX_ASAN_UNPOISON_MEMORY_REGION(addr, size) \ do { \ mdbx_trace("UNPOISON_MEMORY_REGION(%p, %zu) at %u", (void *)(addr), \ (size_t)(size), __LINE__); \ ASAN_UNPOISON_MEMORY_REGION(addr, size); \ } while (0) #include #if defined(_WIN32) || defined(_WIN64) /* * POSIX getopt for Windows * * AT&T Public License * * Code given out at the 1985 UNIFORUM conference in Dallas. */ /*----------------------------------------------------------------------------*/ /* Microsoft compiler generates a lot of warning for self includes... */ #ifdef _MSC_VER #pragma warning(push, 1) #pragma warning(disable : 4548) /* expression before comma has no effect; \ expected expression with side - effect */ #pragma warning(disable : 4530) /* C++ exception handler used, but unwind \ * semantics are not enabled. Specify /EHsc */ #pragma warning(disable : 4577) /* 'noexcept' used with no exception handling \ * mode specified; termination on exception is \ * not guaranteed. Specify /EHsc */ #if !defined(_CRT_SECURE_NO_WARNINGS) #define _CRT_SECURE_NO_WARNINGS #endif #endif /* _MSC_VER (warnings) */ #include #include #ifdef _MSC_VER #pragma warning(pop) #endif /*----------------------------------------------------------------------------*/ #ifndef NULL #define NULL 0 #endif #ifndef EOF #define EOF (-1) #endif int optind = 1; int optopt; char *optarg; int getopt(int argc, char *const argv[], const char *opts) { static int sp = 1; int c; const char *cp; if (sp == 1) { if (optind >= argc || argv[optind][0] != '-' || argv[optind][1] == '\0') return EOF; else if (strcmp(argv[optind], "--") == 0) { optind++; return EOF; } } optopt = c = argv[optind][sp]; if (c == ':' || (cp = strchr(opts, c)) == NULL) { fprintf(stderr, "%s: %s -- %c\n", argv[0], "illegal option", c); if (argv[optind][++sp] == '\0') { optind++; sp = 1; } return '?'; } if (*++cp == ':') { if (argv[optind][sp + 1] != '\0') optarg = &argv[optind++][sp + 1]; else if (++optind >= argc) { fprintf(stderr, "%s: %s -- %c\n", argv[0], "option requires an argument", c); sp = 1; return '?'; } else optarg = argv[optind++]; sp = 1; } else { if (argv[optind][++sp] == '\0') { sp = 1; optind++; } optarg = NULL; } return c; } static volatile BOOL user_break; static BOOL WINAPI ConsoleBreakHandlerRoutine(DWORD dwCtrlType) { (void)dwCtrlType; user_break = true; return true; } #else /* WINDOWS */ static volatile sig_atomic_t user_break; static void signal_handler(int sig) { (void)sig; user_break = 1; } #endif /* !WINDOWS */ static char *prog; static bool quiet = false; static size_t lineno; static void error(const char *func, int rc) { if (!quiet) { if (lineno) fprintf(stderr, "%s: at input line %" PRIiSIZE ": %s() error %d, %s\n", prog, lineno, func, rc, mdbx_strerror(rc)); else fprintf(stderr, "%s: %s() error %d %s\n", prog, func, rc, mdbx_strerror(rc)); } } static char *valstr(char *line, const char *item) { const size_t len = strlen(item); if (strncmp(line, item, len) != 0) return nullptr; if (line[len] != '=') { if (line[len] > ' ') return nullptr; if (!quiet) fprintf(stderr, "%s: line %" PRIiSIZE ": unexpected line format for '%s'\n", prog, lineno, item); exit(EXIT_FAILURE); } char *ptr = strchr(line, '\n'); if (ptr) *ptr = '\0'; return line + len + 1; } static bool valnum(char *line, const char *item, uint64_t *value) { char *str = valstr(line, item); if (!str) return false; char *end = nullptr; *value = strtoull(str, &end, 0); if (end && *end) { if (!quiet) fprintf(stderr, "%s: line %" PRIiSIZE ": unexpected number format for '%s'\n", prog, lineno, item); exit(EXIT_FAILURE); } return true; } static bool valbool(char *line, const char *item, bool *value) { uint64_t u64; if (!valnum(line, item, &u64)) return false; if (u64 > 1) { if (!quiet) fprintf(stderr, "%s: line %" PRIiSIZE ": unexpected value for '%s'\n", prog, lineno, item); exit(EXIT_FAILURE); } *value = u64 != 0; return true; } /*----------------------------------------------------------------------------*/ static char *subname = nullptr; static int dbi_flags; static txnid_t txnid; static uint64_t sequence; static MDBX_canary canary; static MDBX_envinfo envinfo; #define PRINT 1 #define NOHDR 2 #define GLOBAL 4 static int mode = GLOBAL; static MDBX_val kbuf, dbuf; #define STRLENOF(s) (sizeof(s) - 1) typedef struct flagbit { unsigned bit; unsigned len; char *name; } flagbit; #define S(s) STRLENOF(s), s flagbit dbflags[] = { {MDBX_REVERSEKEY, S("reversekey")}, {MDBX_DUPSORT, S("duplicates")}, {MDBX_DUPSORT, S("dupsort")}, {MDBX_INTEGERKEY, S("integerkey")}, {MDBX_DUPFIXED, S("dupfixed")}, {MDBX_INTEGERDUP, S("integerdup")}, {MDBX_REVERSEDUP, S("reversedup")}, {0, 0, nullptr}}; static int readhdr(void) { /* reset parameters */ if (subname) { free(subname); subname = nullptr; } dbi_flags = 0; txnid = 0; sequence = 0; while (true) { errno = 0; if (fgets(dbuf.iov_base, (int)dbuf.iov_len, stdin) == nullptr) return errno ? errno : EOF; if (user_break) return MDBX_EINTR; lineno++; uint64_t u64; if (valnum(dbuf.iov_base, "VERSION", &u64)) { if (u64 != 3) { if (!quiet) fprintf(stderr, "%s: line %" PRIiSIZE ": unsupported value %" PRIu64 " for %s\n", prog, lineno, u64, "VERSION"); exit(EXIT_FAILURE); } continue; } if (valnum(dbuf.iov_base, "db_pagesize", &u64)) { if (!(mode & GLOBAL) && envinfo.mi_dxb_pagesize != u64) { if (!quiet) fprintf(stderr, "%s: line %" PRIiSIZE ": ignore value %" PRIu64 " for '%s' in non-global context\n", prog, lineno, u64, "db_pagesize"); } else if (u64 < MDBX_MIN_PAGESIZE || u64 > MDBX_MAX_PAGESIZE) { if (!quiet) fprintf(stderr, "%s: line %" PRIiSIZE ": ignore unsupported value %" PRIu64 " for %s\n", prog, lineno, u64, "db_pagesize"); } else envinfo.mi_dxb_pagesize = (uint32_t)u64; continue; } char *str = valstr(dbuf.iov_base, "format"); if (str) { if (strcmp(str, "print") == 0) { mode |= PRINT; continue; } if (strcmp(str, "bytevalue") == 0) { mode &= ~PRINT; continue; } if (!quiet) fprintf(stderr, "%s: line %" PRIiSIZE ": unsupported value '%s' for %s\n", prog, lineno, str, "format"); exit(EXIT_FAILURE); } str = valstr(dbuf.iov_base, "database"); if (str) { if (*str) { free(subname); subname = mdbx_strdup(str); if (!subname) { if (!quiet) perror("strdup()"); exit(EXIT_FAILURE); } } continue; } str = valstr(dbuf.iov_base, "type"); if (str) { if (strcmp(str, "btree") != 0) { if (!quiet) fprintf(stderr, "%s: line %" PRIiSIZE ": unsupported value '%s' for %s\n", prog, lineno, str, "type"); free(subname); exit(EXIT_FAILURE); } continue; } if (valnum(dbuf.iov_base, "mapaddr", &u64)) { if (u64) { if (!quiet) fprintf(stderr, "%s: line %" PRIiSIZE ": ignore unsupported value 0x%" PRIx64 " for %s\n", prog, lineno, u64, "mapaddr"); } continue; } if (valnum(dbuf.iov_base, "mapsize", &u64)) { if (!(mode & GLOBAL)) { if (!quiet) fprintf(stderr, "%s: line %" PRIiSIZE ": ignore value %" PRIu64 " for '%s' in non-global context\n", prog, lineno, u64, "mapsize"); } else if (u64 < MIN_MAPSIZE || u64 > MAX_MAPSIZE64) { if (!quiet) fprintf(stderr, "%s: line %" PRIiSIZE ": ignore unsupported value 0x%" PRIx64 " for %s\n", prog, lineno, u64, "mapsize"); } else envinfo.mi_mapsize = (size_t)u64; continue; } if (valnum(dbuf.iov_base, "maxreaders", &u64)) { if (!(mode & GLOBAL)) { if (!quiet) fprintf(stderr, "%s: line %" PRIiSIZE ": ignore value %" PRIu64 " for '%s' in non-global context\n", prog, lineno, u64, "maxreaders"); } else if (u64 < 1 || u64 > MDBX_READERS_LIMIT) { if (!quiet) fprintf(stderr, "%s: line %" PRIiSIZE ": ignore unsupported value 0x%" PRIx64 " for %s\n", prog, lineno, u64, "maxreaders"); } else envinfo.mi_maxreaders = (int)u64; continue; } if (valnum(dbuf.iov_base, "txnid", &u64)) { if (u64 < MIN_TXNID || u64 > MAX_TXNID) { if (!quiet) fprintf(stderr, "%s: line %" PRIiSIZE ": ignore unsupported value 0x%" PRIx64 " for %s\n", prog, lineno, u64, "txnid"); } else txnid = u64; continue; } if (valnum(dbuf.iov_base, "sequence", &u64)) { sequence = u64; continue; } str = valstr(dbuf.iov_base, "geometry"); if (str) { if (!(mode & GLOBAL)) { if (!quiet) fprintf(stderr, "%s: line %" PRIiSIZE ": ignore values %s" " for '%s' in non-global context\n", prog, lineno, str, "geometry"); } else if (sscanf(str, "l%" PRIu64 ",c%" PRIu64 ",u%" PRIu64 ",s%" PRIu64 ",g%" PRIu64, &envinfo.mi_geo.lower, &envinfo.mi_geo.current, &envinfo.mi_geo.upper, &envinfo.mi_geo.shrink, &envinfo.mi_geo.grow) != 5) { if (!quiet) fprintf(stderr, "%s: line %" PRIiSIZE ": unexpected line format for '%s'\n", prog, lineno, "geometry"); exit(EXIT_FAILURE); } continue; } str = valstr(dbuf.iov_base, "canary"); if (str) { if (!(mode & GLOBAL)) { if (!quiet) fprintf(stderr, "%s: line %" PRIiSIZE ": ignore values %s" " for '%s' in non-global context\n", prog, lineno, str, "canary"); } else if (sscanf(str, "v%" PRIu64 ",x%" PRIu64 ",y%" PRIu64 ",z%" PRIu64, &canary.v, &canary.x, &canary.y, &canary.z) != 4) { if (!quiet) fprintf(stderr, "%s: line %" PRIiSIZE ": unexpected line format for '%s'\n", prog, lineno, "canary"); exit(EXIT_FAILURE); } continue; } for (int i = 0; dbflags[i].bit; i++) { bool value = false; if (valbool(dbuf.iov_base, dbflags[i].name, &value)) { if (value) dbi_flags |= dbflags[i].bit; else dbi_flags &= ~dbflags[i].bit; goto next; } } str = valstr(dbuf.iov_base, "HEADER"); if (str) { if (strcmp(str, "END") == 0) return MDBX_SUCCESS; } if (!quiet) fprintf(stderr, "%s: line %" PRIiSIZE ": unrecognized keyword ignored: %s\n", prog, lineno, (char *)dbuf.iov_base); next:; } return EOF; } static int badend(void) { if (!quiet) fprintf(stderr, "%s: line %" PRIiSIZE ": unexpected end of input\n", prog, lineno); return errno ? errno : MDBX_ENODATA; } static __inline int unhex(unsigned char *c2) { int x, c; x = *c2++ & 0x4f; if (x & 0x40) x -= 55; c = x << 4; x = *c2 & 0x4f; if (x & 0x40) x -= 55; c |= x; return c; } __hot static int readline(MDBX_val *out, MDBX_val *buf) { unsigned char *c1, *c2, *end; size_t len, l2; int c; if (user_break) return MDBX_EINTR; errno = 0; if (!(mode & NOHDR)) { c = fgetc(stdin); if (c == EOF) return errno ? errno : EOF; if (c != ' ') { lineno++; errno = 0; if (fgets(buf->iov_base, (int)buf->iov_len, stdin)) { if (c == 'D' && !strncmp(buf->iov_base, "ATA=END", STRLENOF("ATA=END"))) return EOF; } return badend(); } } if (fgets(buf->iov_base, (int)buf->iov_len, stdin) == nullptr) return errno ? errno : EOF; lineno++; c1 = buf->iov_base; len = strlen((char *)c1); l2 = len; /* Is buffer too short? */ while (c1[len - 1] != '\n') { buf->iov_base = mdbx_realloc(buf->iov_base, buf->iov_len * 2); if (!buf->iov_base) { if (!quiet) fprintf(stderr, "%s: line %" PRIiSIZE ": out of memory, line too long\n", prog, lineno); return MDBX_ENOMEM; } c1 = buf->iov_base; c1 += l2; errno = 0; if (fgets((char *)c1, (int)buf->iov_len + 1, stdin) == nullptr) return errno ? errno : EOF; buf->iov_len *= 2; len = strlen((char *)c1); l2 += len; } c1 = c2 = buf->iov_base; len = l2; c1[--len] = '\0'; end = c1 + len; if (mode & PRINT) { while (c2 < end) { if (unlikely(*c2 == '\\')) { if (c2[1] == '\\') { *c1++ = '\\'; } else { if (c2 + 3 > end || !isxdigit(c2[1]) || !isxdigit(c2[2])) return badend(); *c1++ = (char)unhex(++c2); } c2 += 2; } else { /* copies are redundant when no escapes were used */ *c1++ = *c2++; } } } else { /* odd length not allowed */ if (len & 1) return badend(); while (c2 < end) { if (!isxdigit(*c2) || !isxdigit(c2[1])) return badend(); *c1++ = (char)unhex(c2); c2 += 2; } } c2 = out->iov_base = buf->iov_base; out->iov_len = c1 - c2; return MDBX_SUCCESS; } static void usage(void) { fprintf(stderr, "usage: %s " "[-V] [-q] [-a] [-f file] [-s name] [-N] [-p] [-T] [-r] [-n] dbpath\n" " -V\t\tprint version and exit\n" " -q\t\tbe quiet\n" " -a\t\tappend records in input order (required for custom " "comparators)\n" " -f file\tread from file instead of stdin\n" " -s name\tload into specified named subDB\n" " -N\t\tdon't overwrite existing records when loading, just skip " "ones\n" " -p\t\tpurge subDB before loading\n" " -T\t\tread plaintext\n" " -r\t\trescue mode (ignore errors to load corrupted DB dump)\n" " -n\t\tdon't use subdirectory for newly created database " "(MDBX_NOSUBDIR)\n", prog); exit(EXIT_FAILURE); } static int equal_or_greater(const MDBX_val *a, const MDBX_val *b) { return (a->iov_len == b->iov_len && memcmp(a->iov_base, b->iov_base, a->iov_len) == 0) ? 0 : 1; } int main(int argc, char *argv[]) { int i, rc; MDBX_env *env = nullptr; MDBX_txn *txn = nullptr; MDBX_cursor *mc = nullptr; MDBX_dbi dbi; char *envname = nullptr; int envflags = MDBX_SAFE_NOSYNC | MDBX_ACCEDE, putflags = MDBX_UPSERT; bool rescue = false; bool purge = false; prog = argv[0]; if (argc < 2) usage(); while ((i = getopt(argc, argv, "a" "f:" "n" "s:" "N" "p" "T" "V" "r" "q")) != EOF) { switch (i) { case 'V': printf("mdbx_load version %d.%d.%d.%d\n" " - source: %s %s, commit %s, tree %s\n" " - anchor: %s\n" " - build: %s for %s by %s\n" " - flags: %s\n" " - options: %s\n", mdbx_version.major, mdbx_version.minor, mdbx_version.release, mdbx_version.revision, mdbx_version.git.describe, mdbx_version.git.datetime, mdbx_version.git.commit, mdbx_version.git.tree, mdbx_sourcery_anchor, mdbx_build.datetime, mdbx_build.target, mdbx_build.compiler, mdbx_build.flags, mdbx_build.options); return EXIT_SUCCESS; case 'a': putflags |= MDBX_APPEND; break; case 'f': if (freopen(optarg, "r", stdin) == nullptr) { if (!quiet) fprintf(stderr, "%s: %s: open: %s\n", prog, optarg, mdbx_strerror(errno)); exit(EXIT_FAILURE); } break; case 'n': envflags |= MDBX_NOSUBDIR; break; case 's': subname = mdbx_strdup(optarg); break; case 'N': putflags |= MDBX_NOOVERWRITE | MDBX_NODUPDATA; break; case 'p': purge = true; break; case 'T': mode |= NOHDR | PRINT; break; case 'q': quiet = true; break; case 'r': rescue = true; break; default: usage(); } } if (optind != argc - 1) usage(); #if defined(_WIN32) || defined(_WIN64) SetConsoleCtrlHandler(ConsoleBreakHandlerRoutine, true); #else #ifdef SIGPIPE signal(SIGPIPE, signal_handler); #endif #ifdef SIGHUP signal(SIGHUP, signal_handler); #endif signal(SIGINT, signal_handler); signal(SIGTERM, signal_handler); #endif /* !WINDOWS */ envname = argv[optind]; if (!quiet) printf("mdbx_load %s (%s, T-%s)\nRunning for %s...\n", mdbx_version.git.describe, mdbx_version.git.datetime, mdbx_version.git.tree, envname); fflush(nullptr); dbuf.iov_len = 4096; dbuf.iov_base = mdbx_malloc(dbuf.iov_len); if (!dbuf.iov_base) { rc = MDBX_ENOMEM; error("value-buffer", rc); goto env_close; } /* read first header for mapsize= */ if (!(mode & NOHDR)) { rc = readhdr(); if (unlikely(rc != MDBX_SUCCESS)) { if (rc == EOF) rc = MDBX_ENODATA; error("readheader", rc); goto env_close; } } rc = mdbx_env_create(&env); if (unlikely(rc != MDBX_SUCCESS)) { error("mdbx_env_create", rc); return EXIT_FAILURE; } mdbx_env_set_maxdbs(env, 2); if (envinfo.mi_maxreaders) { rc = mdbx_env_set_maxreaders(env, envinfo.mi_maxreaders); if (unlikely(rc != MDBX_SUCCESS)) { error("mdbx_env_set_maxreaders", rc); goto env_close; } } if (envinfo.mi_geo.current | envinfo.mi_mapsize) { if (envinfo.mi_geo.current) { rc = mdbx_env_set_geometry( env, (intptr_t)envinfo.mi_geo.lower, (intptr_t)envinfo.mi_geo.current, (intptr_t)envinfo.mi_geo.upper, (intptr_t)envinfo.mi_geo.shrink, (intptr_t)envinfo.mi_geo.grow, envinfo.mi_dxb_pagesize ? (intptr_t)envinfo.mi_dxb_pagesize : -1); } else { if (envinfo.mi_mapsize > MAX_MAPSIZE) { if (!quiet) fprintf( stderr, "Database size is too large for current system (mapsize=%" PRIu64 " is great than system-limit %zu)\n", envinfo.mi_mapsize, (size_t)MAX_MAPSIZE); goto env_close; } rc = mdbx_env_set_geometry( env, (intptr_t)envinfo.mi_mapsize, (intptr_t)envinfo.mi_mapsize, (intptr_t)envinfo.mi_mapsize, 0, 0, envinfo.mi_dxb_pagesize ? (intptr_t)envinfo.mi_dxb_pagesize : -1); } if (unlikely(rc != MDBX_SUCCESS)) { error("mdbx_env_set_geometry", rc); goto env_close; } } rc = mdbx_env_open(env, envname, envflags, 0664); if (unlikely(rc != MDBX_SUCCESS)) { error("mdbx_env_open", rc); goto env_close; } kbuf.iov_len = mdbx_env_get_maxvalsize_ex(env, 0) + 1; if (kbuf.iov_len >= INTPTR_MAX / 2) { if (!quiet) fprintf(stderr, "mdbx_env_get_maxkeysize() failed, returns %zu\n", kbuf.iov_len); goto env_close; } kbuf.iov_base = malloc(kbuf.iov_len); if (!kbuf.iov_base) { rc = MDBX_ENOMEM; error("key-buffer", rc); goto env_close; } while (rc == MDBX_SUCCESS) { if (user_break) { rc = MDBX_EINTR; break; } rc = mdbx_txn_begin(env, nullptr, 0, &txn); if (unlikely(rc != MDBX_SUCCESS)) { error("mdbx_txn_begin", rc); goto env_close; } if (mode & GLOBAL) { mode -= GLOBAL; if (canary.v | canary.x | canary.y | canary.z) { rc = mdbx_canary_put(txn, &canary); if (unlikely(rc != MDBX_SUCCESS)) { error("mdbx_canary_put", rc); goto txn_abort; } } } const char *const dbi_name = subname ? subname : "@MAIN"; rc = mdbx_dbi_open_ex(txn, subname, dbi_flags | MDBX_CREATE, &dbi, (putflags & MDBX_APPEND) ? equal_or_greater : nullptr, (putflags & MDBX_APPEND) ? equal_or_greater : nullptr); if (unlikely(rc != MDBX_SUCCESS)) { error("mdbx_dbi_open_ex", rc); goto txn_abort; } uint64_t present_sequence; rc = mdbx_dbi_sequence(txn, dbi, &present_sequence, 0); if (unlikely(rc != MDBX_SUCCESS)) { error("mdbx_dbi_sequence", rc); goto txn_abort; } if (present_sequence > sequence) { if (!quiet) fprintf(stderr, "present sequence for '%s' value (%" PRIu64 ") is greater than loaded (%" PRIu64 ")\n", dbi_name, present_sequence, sequence); rc = MDBX_RESULT_TRUE; goto txn_abort; } if (present_sequence < sequence) { rc = mdbx_dbi_sequence(txn, dbi, nullptr, sequence - present_sequence); if (unlikely(rc != MDBX_SUCCESS)) { error("mdbx_dbi_sequence", rc); goto txn_abort; } } if (purge) { rc = mdbx_drop(txn, dbi, false); if (unlikely(rc != MDBX_SUCCESS)) { error("mdbx_drop", rc); goto txn_abort; } } if (putflags & MDBX_APPEND) putflags = (dbi_flags & MDBX_DUPSORT) ? putflags | MDBX_APPENDDUP : putflags & ~MDBX_APPENDDUP; rc = mdbx_cursor_open(txn, dbi, &mc); if (unlikely(rc != MDBX_SUCCESS)) { error("mdbx_cursor_open", rc); goto txn_abort; } int batch = 0; while (rc == MDBX_SUCCESS) { MDBX_val key, data; rc = readline(&key, &kbuf); if (rc == EOF) break; if (rc == MDBX_SUCCESS) rc = readline(&data, &dbuf); if (rc) { if (!quiet) fprintf(stderr, "%s: line %" PRIiSIZE ": failed to read key value\n", prog, lineno); goto txn_abort; } rc = mdbx_cursor_put(mc, &key, &data, putflags); if (rc == MDBX_KEYEXIST && putflags) continue; if (rc == MDBX_BAD_VALSIZE && rescue) { if (!quiet) fprintf(stderr, "%s: skip line %" PRIiSIZE ": due %s\n", prog, lineno, mdbx_strerror(rc)); continue; } if (unlikely(rc != MDBX_SUCCESS)) { error("mdbx_cursor_put", rc); goto txn_abort; } batch++; MDBX_txn_info txn_info; rc = mdbx_txn_info(txn, &txn_info, false); if (unlikely(rc != MDBX_SUCCESS)) { error("mdbx_txn_info", rc); goto txn_abort; } if (batch == 10000 || txn_info.txn_space_dirty > MEGABYTE * 256) { rc = mdbx_txn_commit(txn); if (unlikely(rc != MDBX_SUCCESS)) { error("mdbx_txn_commit", rc); goto env_close; } batch = 0; rc = mdbx_txn_begin(env, nullptr, 0, &txn); if (unlikely(rc != MDBX_SUCCESS)) { error("mdbx_txn_begin", rc); goto env_close; } rc = mdbx_cursor_bind(txn, mc, dbi); if (unlikely(rc != MDBX_SUCCESS)) { error("mdbx_cursor_bind", rc); goto txn_abort; } } } mdbx_cursor_close(mc); mc = nullptr; rc = mdbx_txn_commit(txn); txn = nullptr; if (unlikely(rc != MDBX_SUCCESS)) { error("mdbx_txn_commit", rc); goto env_close; } if (subname) { assert(dbi != MAIN_DBI); rc = mdbx_dbi_close(env, dbi); if (unlikely(rc != MDBX_SUCCESS)) { error("mdbx_dbi_close", rc); goto env_close; } } else { assert(dbi == MAIN_DBI); } /* try read next header */ if (!(mode & NOHDR)) rc = readhdr(); else if (ferror(stdin) || feof(stdin)) break; } switch (rc) { case EOF: rc = MDBX_SUCCESS; case MDBX_SUCCESS: break; case MDBX_EINTR: if (!quiet) fprintf(stderr, "Interrupted by signal/user\n"); break; default: if (unlikely(rc != MDBX_SUCCESS)) error("readline", rc); } txn_abort: mdbx_cursor_close(mc); mdbx_txn_abort(txn); env_close: mdbx_env_close(env); free(kbuf.iov_base); free(dbuf.iov_base); return rc ? EXIT_FAILURE : EXIT_SUCCESS; }