/* classes: h_files */ #ifndef SCM___SCM_H #define SCM___SCM_H /* Copyright (C) 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2003, 2006, * 2007, 2008, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public License * as published by the Free Software Foundation; either version 3 of * the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA * 02110-1301 USA */ /********************************************************************** This file is Guile's central public header. When included by other files, this file should preceed any include other than __scm.h. Under *NO* circumstances should new items be added to the global namespace (via adding #define, typedef, or similar to this file) with generic names. This usually means that any new names should be prefixed by either SCM_ or GUILE_. i.e. do *not* #define HAVE_FOO or SIZEOF_BAR. See configure.in, gen-scmconfig.h.in, and gen-scmconfig.c for examples of how to properly handle this issue. The main documentation is in gen-scmconfig.c. "What's the difference between _scm.h and __scm.h?" _scm.h is not installed; it's only visible to the libguile sources themselves, and it includes config.h, the private config header. __scm.h is installed, and is #included by . If both the client and libguile need some piece of information, and it doesn't fit well into the header file for any particular module, it should go in __scm.h. __scm.h includes scmconfig.h, the public config header. **********************************************************************/ /* What did the configure script discover about the outside world? */ #include "libguile/scmconfig.h" /* {Compiler hints} * * The following macros are used to provide additional information for the * compiler, which may help to do better error checking and code * optimization. A second benefit of these macros is, that they also provide * additional information to the developers. */ /* Return true (non-zero) if GCC version MAJ.MIN or later is being used * (macro taken from glibc.) */ #if defined __GNUC__ && defined __GNUC_MINOR__ # define SCM_GNUC_PREREQ(maj, min) \ ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) #else # define SCM_GNUC_PREREQ(maj, min) 0 #endif /* The macro SCM_NORETURN indicates that a function will never return. * Examples: * 1) int foo (char arg) SCM_NORETURN; */ #ifdef __GNUC__ #define SCM_NORETURN __attribute__ ((__noreturn__)) #else #define SCM_NORETURN #endif /* The macro SCM_UNUSED indicates that a function, function argument or * variable may potentially be unused. * Examples: * 1) static int unused_function (char arg) SCM_UNUSED; * 2) int foo (char unused_argument SCM_UNUSED); * 3) int unused_variable SCM_UNUSED; */ #ifdef __GNUC__ #define SCM_UNUSED __attribute__ ((unused)) #else #define SCM_UNUSED #endif /* The SCM_EXPECT macros provide branch prediction hints to the compiler. To * use only in places where the result of the expression under "normal" * circumstances is known. */ #if SCM_GNUC_PREREQ (3, 0) # define SCM_EXPECT __builtin_expect #else # define SCM_EXPECT(_expr, _value) (_expr) #endif #define SCM_LIKELY(_expr) SCM_EXPECT ((_expr), 1) #define SCM_UNLIKELY(_expr) SCM_EXPECT ((_expr), 0) /* The SCM_INTERNAL macro makes it possible to explicitly declare a function * as having "internal" linkage. However our current tack on this problem is * to use GCC 4's -fvisibility=hidden, making functions internal by default, * and then SCM_API marks them for export. */ #define SCM_INTERNAL extern /* The SCM_DEPRECATED macro is used in declarations of deprecated functions * or variables. Defining `SCM_BUILDING_DEPRECATED_CODE' allows deprecated * functions to be implemented in terms of deprecated functions, and allows * deprecated functions to be referred to by `scm_c_define_gsubr ()'. */ #if !defined (SCM_BUILDING_DEPRECATED_CODE) && SCM_GNUC_PREREQ (3, 0) # define SCM_DEPRECATED SCM_API __attribute__ ((__deprecated__)) #else # define SCM_DEPRECATED SCM_API #endif /* The SCM_ALIGNED macro, when defined, can be used to instruct the compiler * to honor the given alignment constraint. */ /* Sun Studio supports alignment since Sun Studio 12 */ #if defined __GNUC__ || (defined( __SUNPRO_C ) && (__SUNPRO_C - 0 >= 0x590)) # define SCM_ALIGNED(x) __attribute__ ((aligned (x))) #elif defined __INTEL_COMPILER # define SCM_ALIGNED(x) __declspec (align (x)) #else /* Don't know how to align things. */ # undef SCM_ALIGNED #endif /* The SCM_MALLOC macro can be used in function declarations to tell the * compiler that a function may be treated as if any non-NULL pointer it returns * cannot alias any other pointer valid when the function returns. */ #if SCM_GNUC_PREREQ (3, 0) # define SCM_MALLOC __attribute__ ((__malloc__)) #else # define SCM_MALLOC #endif /* {Supported Options} * * These may be defined or undefined. */ /* #define GUILE_DEBUG_FREELIST */ /* Use engineering notation when converting numbers strings? */ #undef ENGNOT /* {Unsupported Options} * * These must be defined as given here. */ /* Guile Scheme supports the #f/() distinction; Guile Lisp won't. We have horrible plans for their unification. */ #undef SICP /* Random options (not yet supported or in final form). */ #define STACK_CHECKING #undef NO_CEVAL_STACK_CHECKING /* SCM_API is a macro prepended to all function and data definitions which should be exported from libguile. */ #if defined BUILDING_LIBGUILE && defined HAVE_VISIBILITY # define SCM_API extern __attribute__((__visibility__("default"))) #elif defined BUILDING_LIBGUILE && defined _MSC_VER # define SCM_API __declspec(dllexport) extern #elif defined _MSC_VER # define SCM_API __declspec(dllimport) extern #else # define SCM_API extern #endif /* We would like gnu89 extern inline semantics, not C99 extern inline semantics, so that we can be sure to avoid reifying definitions of inline functions in all compilation units, which is a possibility at low optimization levels, or if a user takes the address of an inline function. Hence the `__gnu_inline__' attribute, in accordance with: http://gcc.gnu.org/gcc-4.3/porting_to.html . With GCC 4.2, `__GNUC_STDC_INLINE__' is never defined (because C99 inline semantics are not supported), but a warning is issued in C99 mode if `__gnu_inline__' is not used. Apple's GCC build >5400 (since Xcode 3.0) doesn't support GNU inline in C99 mode and doesn't define `__GNUC_STDC_INLINE__'. Fall back to "static inline" in that case. */ # if (defined __GNUC__) && (!(((defined __APPLE_CC__) && (__APPLE_CC__ > 5400)) && __STDC_VERSION__ >= 199901L)) # if (defined __GNUC_STDC_INLINE__) || (__GNUC__ == 4 && __GNUC_MINOR__ == 2) # define SCM_C_EXTERN_INLINE \ extern __inline__ __attribute__ ((__gnu_inline__)) # else # define SCM_C_EXTERN_INLINE extern __inline__ # endif # endif /* SCM_INLINE is a macro prepended to all public inline function declarations. Implementations of those functions should also be in the header file, prefixed by SCM_INLINE_IMPLEMENTATION, and protected by SCM_CAN_INLINE and a CPP define for the C file in question, like SCM_INLINE_C_INCLUDING_INLINE_H. See inline.h for an example usage. */ #if defined SCM_IMPLEMENT_INLINES /* Reifying functions to a file, whether or not inlining is available. */ # define SCM_CAN_INLINE 0 # define SCM_INLINE SCM_API # define SCM_INLINE_IMPLEMENTATION #elif defined SCM_C_INLINE /* Declarations when inlining is available. */ # define SCM_CAN_INLINE 1 # ifdef SCM_C_EXTERN_INLINE # define SCM_INLINE SCM_C_EXTERN_INLINE # else /* Fall back to static inline if GNU "extern inline" is unavailable. */ # define SCM_INLINE static SCM_C_INLINE # endif # define SCM_INLINE_IMPLEMENTATION SCM_INLINE #else /* Declarations when inlining is not available. */ # define SCM_CAN_INLINE 0 # define SCM_INLINE SCM_API /* Don't define SCM_INLINE_IMPLEMENTATION; it should never be seen in this case. */ #endif /* {Debugging Options} * * These compile time options determine whether to include code that is only * useful for debugging guile itself or C level extensions to guile. The * common prefix for all option macros of this kind is "SCM_DEBUG_". It is * guaranteed that a macro named SCM_DEBUG_XXX is always defined (typically to * either 0 or 1), i. e. there is no need to test for the undefined case. * This allows to use these definitions comfortably within code, as in the * following example: * #define FOO do { if (SCM_DEBUG_XXX) bar(); else baz(); } while (0) * Any sane compiler will remove the unused branch without any performance * penalty for the resulting code. * * Note: Some SCM_DEBUG_XXX options are not settable at configure time. * To change the value of such options you will have to edit this header * file or give suitable options to make, like: * make all CFLAGS="-DSCM_DEBUG_XXX=1 ..." */ /* The value of SCM_DEBUG determines the default for most of the not yet * defined debugging options. This allows, for example, to enable most of the * debugging options by simply defining SCM_DEBUG as 1. */ #ifndef SCM_DEBUG #define SCM_DEBUG 0 #endif /* For debugging purposes: define this is to ensure nobody is using * the mark bits outside of the marking phase. This is meant for * debugging purposes only. */ #ifndef SCM_DEBUG_MARKING_API #define SCM_DEBUG_MARKING_API 0 #endif /* If SCM_DEBUG_CELL_ACCESSES is set to 1, cell accesses will perform * exhaustive parameter checking: It will be verified that cell parameters * actually point to a valid heap cell. Note: If this option is enabled, * guile will run about ten times slower than normally. */ #ifndef SCM_DEBUG_CELL_ACCESSES #define SCM_DEBUG_CELL_ACCESSES SCM_DEBUG #endif /* If SCM_DEBUG_INTERRUPTS is set to 1, with every deferring and allowing of * interrupts a consistency check will be performed. */ #ifndef SCM_DEBUG_INTERRUPTS #define SCM_DEBUG_INTERRUPTS SCM_DEBUG #endif /* If SCM_DEBUG_PAIR_ACCESSES is set to 1, accesses to cons cells will be * exhaustively checked. Note: If this option is enabled, guile will run * slower than normally. */ #ifndef SCM_DEBUG_PAIR_ACCESSES #define SCM_DEBUG_PAIR_ACCESSES SCM_DEBUG #endif /* If SCM_DEBUG_REST_ARGUMENT is set to 1, functions that take rest arguments * will check whether the rest arguments are actually passed as a proper list. * Otherwise, if SCM_DEBUG_REST_ARGUMENT is 0, functions that take rest * arguments will take it for granted that these are passed as a proper list. */ #ifndef SCM_DEBUG_REST_ARGUMENT #define SCM_DEBUG_REST_ARGUMENT SCM_DEBUG #endif /* The macro SCM_DEBUG_TYPING_STRICTNESS indicates what level of type checking * shall be performed with respect to the use of the SCM datatype. The macro * may be defined to one of the values 0, 1 and 2. * * A value of 0 means that there will be no compile time type checking, since * the SCM datatype will be declared as an integral type. This setting should * only be used on systems, where casting from integral types to pointers may * lead to loss of bit information. * * A value of 1 means that there will an intermediate level of compile time * type checking, since the SCM datatype will be declared as a pointer to an * undefined struct. This setting is the default, since it does not cost * anything in terms of performance or code size. * * A value of 2 provides a maximum level of compile time type checking since * the SCM datatype will be declared as a struct. This setting should be used * for _compile time_ type checking only, since the compiled result is likely * to be quite inefficient. The right way to make use of this option is to do * a 'make clean; make CFLAGS=-DSCM_DEBUG_TYPING_STRICTNESS=2', fix your * errors, and then do 'make clean; make'. */ #ifndef SCM_DEBUG_TYPING_STRICTNESS #define SCM_DEBUG_TYPING_STRICTNESS 1 #endif /* If SCM_DEBUG_DEBUGGING_SUPPORT is set to 1, guile will provide a set of * special functions that support debugging with a debugger like gdb or * debugging of guile internals on the scheme level. The behaviour of guile * is not changed by this macro, only the set of functions that are available * will differ. All functions that are introduced this way have the prefix * 'scm_dbg_' on the C level and the prefix 'dbg-' on the scheme level. This * allows to easily determine the set of support functions, given that your * debugger or repl provide automatic name completion. Note that these * functions are intended to be used during interactive debugging sessions * only. They are not considered part of guile's official API. They may * change or disappear without notice or deprecation phase. */ #ifndef SCM_DEBUG_DEBUGGING_SUPPORT #define SCM_DEBUG_DEBUGGING_SUPPORT SCM_DEBUG #endif /* {Feature Options} * * These compile time options determine whether code for certain features * should be compiled into guile. The common prefix for all option macros * of this kind is "SCM_ENABLE_". It is guaranteed that a macro named * SCM_ENABLE_XXX is defined to be either 0 or 1, i. e. there is no need to * test for the undefined case. This allows to use these definitions * comfortably within code, as in the following example: * #define FOO do { if (SCM_ENABLE_XXX) bar(); else baz(); } while (0) * Any sane compiler will remove the unused branch without any performance * penalty for the resulting code. * * Note: Some SCM_ENABLE_XXX options are not settable at configure time. * To change the value of such options you will have to edit this header * file or give suitable options to make, like: * make all CFLAGS="-DSCM_ENABLE_XXX=1 ..." */ /* If SCM_ENABLE_DEPRECATED is set to 1, deprecated code will be included in * guile, as well as some functions to issue run-time warnings about uses of * deprecated functions. */ #ifndef SCM_ENABLE_DEPRECATED #define SCM_ENABLE_DEPRECATED 0 #endif /* {Architecture and compiler properties} * * Guile as of today can only work on systems which fulfill at least the * following requirements: * * - scm_t_bits and SCM variables have at least 32 bits. * Guile's type system is based on this assumption. * * - sizeof (scm_t_bits) >= sizeof (void*) and sizeof (SCM) >= sizeof (void*) * Guile's type system is based on this assumption, since it must be * possible to store pointers to cells on the heap in scm_t_bits and SCM * variables. * * - sizeof (scm_t_bits) >= 4 and sizeof (scm_t_bits) is a power of 2. * Guile's type system is based on this assumption. In particular, it is * assumed that cells, i. e. pairs of scm_t_bits variables, are eight * character aligned. This is because three bits of a scm_t_bits variable * that is holding a pointer to a cell on the heap must be available for * storing type data. * * - sizeof (scm_t_bits) <= sizeof (void*) and sizeof (SCM) <= sizeof (void*) * In some parts of guile, scm_t_bits and SCM variables are passed to * functions as void* arguments. Together with the requirement above, this * requires a one-to-one correspondence between the size of a void* and the * sizes of scm_t_bits and SCM variables. * * - numbers are encoded using two's complement. * The implementation of the bitwise scheme level operations is based on * this assumption. * * - ... add more */ #ifdef CHAR_BIT # define SCM_CHAR_BIT CHAR_BIT #else # define SCM_CHAR_BIT 8 #endif #ifdef LONG_BIT # define SCM_LONG_BIT LONG_BIT #else # define SCM_LONG_BIT (SCM_SIZEOF_LONG * 8) #endif #define SCM_I_UTYPE_MAX(type) ((type)-1) #define SCM_I_TYPE_MAX(type,umax) ((type)((umax)/2)) #define SCM_I_TYPE_MIN(type,umax) (-((type)((umax)/2))-1) #define SCM_T_UINT8_MAX SCM_I_UTYPE_MAX(scm_t_uint8) #define SCM_T_INT8_MIN SCM_I_TYPE_MIN(scm_t_int8,SCM_T_UINT8_MAX) #define SCM_T_INT8_MAX SCM_I_TYPE_MAX(scm_t_int8,SCM_T_UINT8_MAX) #define SCM_T_UINT16_MAX SCM_I_UTYPE_MAX(scm_t_uint16) #define SCM_T_INT16_MIN SCM_I_TYPE_MIN(scm_t_int16,SCM_T_UINT16_MAX) #define SCM_T_INT16_MAX SCM_I_TYPE_MAX(scm_t_int16,SCM_T_UINT16_MAX) #define SCM_T_UINT32_MAX SCM_I_UTYPE_MAX(scm_t_uint32) #define SCM_T_INT32_MIN SCM_I_TYPE_MIN(scm_t_int32,SCM_T_UINT32_MAX) #define SCM_T_INT32_MAX SCM_I_TYPE_MAX(scm_t_int32,SCM_T_UINT32_MAX) #define SCM_T_UINT64_MAX SCM_I_UTYPE_MAX(scm_t_uint64) #define SCM_T_INT64_MIN SCM_I_TYPE_MIN(scm_t_int64,SCM_T_UINT64_MAX) #define SCM_T_INT64_MAX SCM_I_TYPE_MAX(scm_t_int64,SCM_T_UINT64_MAX) #if SCM_SIZEOF_LONG_LONG #define SCM_I_ULLONG_MAX SCM_I_UTYPE_MAX(unsigned long long) #define SCM_I_LLONG_MIN SCM_I_TYPE_MIN(long long,SCM_I_ULLONG_MAX) #define SCM_I_LLONG_MAX SCM_I_TYPE_MAX(long long,SCM_I_ULLONG_MAX) #endif #define SCM_T_UINTMAX_MAX SCM_I_UTYPE_MAX(scm_t_uintmax) #define SCM_T_INTMAX_MIN SCM_I_TYPE_MIN(scm_t_intmax,SCM_T_UINTMAX_MAX) #define SCM_T_INTMAX_MAX SCM_I_TYPE_MAX(scm_t_intmax,SCM_T_UINTMAX_MAX) #define SCM_T_UINTPTR_MAX SCM_I_UTYPE_MAX(scm_t_uintptr) #define SCM_T_INTPTR_MIN SCM_I_TYPE_MIN(scm_t_intptr,SCM_T_UINTPTR_MAX) #define SCM_T_INTPTR_MAX SCM_I_TYPE_MAX(scm_t_intptr,SCM_T_UINTPTR_MAX) #define SCM_I_SIZE_MAX SCM_I_UTYPE_MAX(size_t) #define SCM_I_SSIZE_MIN SCM_I_TYPE_MIN(ssize_t,SCM_I_SIZE_MAX) #define SCM_I_SSIZE_MAX SCM_I_TYPE_MAX(ssize_t,SCM_I_SIZE_MAX) #include "libguile/tags.h" /* The type of subrs, i.e., Scheme procedures implemented in C. Empty function declarators are used internally for pointers to functions of any arity. However, these are equivalent to `(void)' in C++, are obsolescent as of C99, and trigger `strict-prototypes' GCC warnings (bug #23681). */ #ifdef BUILDING_LIBGUILE typedef SCM (* scm_t_subr) (); #else typedef void *scm_t_subr; #endif #ifdef vms # ifndef CHEAP_CONTINUATIONS typedef int jmp_buf[17]; extern int setjump(jmp_buf env); extern int longjump(jmp_buf env, int ret); # define setjmp setjump # define longjmp longjump # else # include # endif #else /* ndef vms */ # ifdef _CRAY1 typedef int jmp_buf[112]; extern int setjump(jmp_buf env); extern int longjump(jmp_buf env, int ret); # define setjmp setjump # define longjmp longjump # else /* ndef _CRAY1 */ # if defined (__ia64__) /* For IA64, emulate the setjmp API using getcontext. */ # include # include typedef struct { ucontext_t ctx; int fresh; } scm_i_jmp_buf; # define SCM_I_SETJMP(JB) \ ( (JB).fresh = 1, \ getcontext (&((JB).ctx)), \ ((JB).fresh ? ((JB).fresh = 0, 0) : 1) ) # define SCM_I_LONGJMP(JB,VAL) scm_ia64_longjmp (&(JB), VAL) void scm_ia64_longjmp (scm_i_jmp_buf *, int); # else /* ndef __ia64__ */ # include # endif /* ndef __ia64__ */ # endif /* ndef _CRAY1 */ #endif /* ndef vms */ /* For any platform where SCM_I_SETJMP hasn't been defined in some special way above, map SCM_I_SETJMP, SCM_I_LONGJMP and scm_i_jmp_buf to setjmp, longjmp and jmp_buf. */ #ifndef SCM_I_SETJMP #define scm_i_jmp_buf jmp_buf #define SCM_I_SETJMP setjmp #define SCM_I_LONGJMP longjmp #endif /* James Clark came up with this neat one instruction fix for * continuations on the SPARC. It flushes the register windows so * that all the state of the process is contained in the stack. */ #if defined (sparc) || defined (__sparc__) || defined (__sparc) # define SCM_FLUSH_REGISTER_WINDOWS asm("ta 3") #else # define SCM_FLUSH_REGISTER_WINDOWS /* empty */ #endif /* If stack is not longword aligned then */ /* #define SHORT_ALIGN */ #ifdef THINK_C # define SHORT_ALIGN #endif #ifdef MSDOS # define SHORT_ALIGN #endif #ifdef atarist # define SHORT_ALIGN #endif #ifdef SHORT_ALIGN typedef short SCM_STACKITEM; #else typedef long SCM_STACKITEM; #endif /* Cast pointer through (void *) in order to avoid compiler warnings when strict aliasing is enabled */ #define SCM_STACK_PTR(ptr) ((SCM_STACKITEM *) (void *) (ptr)) SCM_API void scm_async_tick (void); #ifdef BUILDING_LIBGUILE /* FIXME: should change names */ # define SCM_ASYNC_TICK \ do \ { \ if (SCM_UNLIKELY (SCM_I_CURRENT_THREAD->pending_asyncs)) \ scm_async_click (); \ } \ while (0) /* SCM_ASYNC_TICK_WITH_CODE is only available to Guile itself */ # define SCM_ASYNC_TICK_WITH_CODE(thr, stmt) \ do \ { \ if (SCM_UNLIKELY (thr->pending_asyncs)) \ { \ stmt; \ scm_async_click (); \ } \ } \ while (0) #else /* !BUILDING_LIBGUILE */ # define SCM_ASYNC_TICK (scm_async_tick ()) #endif /* !BUILDING_LIBGUILE */ /* Anthony Green writes: When the compiler sees... DEFER_INTS; [critical code here] ALLOW_INTS; ...it doesn't actually promise to keep the critical code within the boundries of the DEFER/ALLOW_INTS instructions. It may very well schedule it outside of the magic defined in those macros. However, GCC's volatile asm feature forms a barrier over which code is never moved. So if you add... asm (""); ...to each of the DEFER_INTS and ALLOW_INTS macros, the critical code will always remain in place. asm's without inputs or outputs are implicitly volatile. */ #ifdef __GNUC__ #define SCM_FENCE asm /* volatile */ ("") #elif defined (__INTEL_COMPILER) && defined (__ia64) #define SCM_FENCE __memory_barrier() #else #define SCM_FENCE #endif #define SCM_TICK \ do { \ SCM_ASYNC_TICK; \ SCM_THREAD_SWITCHING_CODE; \ } while (0) /** SCM_ASSERT ** **/ #ifdef SCM_RECKLESS #define SCM_ASSERT(_cond, _arg, _pos, _subr) #define SCM_ASSERT_TYPE(_cond, _arg, _pos, _subr, _msg) #else #define SCM_ASSERT(_cond, _arg, _pos, _subr) \ do { if (SCM_UNLIKELY (!(_cond))) \ scm_wrong_type_arg (_subr, _pos, _arg); } while (0) #define SCM_ASSERT_TYPE(_cond, _arg, _pos, _subr, _msg) \ do { if (SCM_UNLIKELY (!(_cond))) \ scm_wrong_type_arg_msg(_subr, _pos, _arg, _msg); } while (0) #endif /* * SCM_WTA_DISPATCH */ /* Dirk:FIXME:: In all of the SCM_WTA_DISPATCH_* macros it is assumed that * 'gf' is zero if uninitialized. It would be cleaner if some valid SCM value * like SCM_BOOL_F or SCM_UNDEFINED was chosen. */ SCM_API SCM scm_call_generic_0 (SCM gf); #define SCM_WTA_DISPATCH_0(gf, subr) \ return (SCM_UNPACK (gf) \ ? scm_call_generic_0 ((gf)) \ : (scm_error_num_args_subr ((subr)), SCM_UNSPECIFIED)) #define SCM_GASSERT0(cond, gf, subr) \ if (SCM_UNLIKELY(!(cond))) \ SCM_WTA_DISPATCH_0((gf), (subr)) SCM_API SCM scm_call_generic_1 (SCM gf, SCM a1); #define SCM_WTA_DISPATCH_1(gf, a1, pos, subr) \ return (SCM_UNPACK (gf) \ ? scm_call_generic_1 ((gf), (a1)) \ : (scm_wrong_type_arg ((subr), (pos), (a1)), SCM_UNSPECIFIED)) /* This form is for dispatching a subroutine. */ #define SCM_WTA_DISPATCH_1_SUBR(subr, a1, pos) \ return (SCM_UNPACK ((*SCM_SUBR_GENERIC (subr))) \ ? scm_call_generic_1 ((*SCM_SUBR_GENERIC (subr)), (a1)) \ : (scm_i_wrong_type_arg_symbol (SCM_SUBR_NAME (subr), (pos), (a1)), SCM_UNSPECIFIED)) #define SCM_GASSERT1(cond, gf, a1, pos, subr) \ if (SCM_UNLIKELY (!(cond))) \ SCM_WTA_DISPATCH_1((gf), (a1), (pos), (subr)) SCM_API SCM scm_call_generic_2 (SCM gf, SCM a1, SCM a2); #define SCM_WTA_DISPATCH_2(gf, a1, a2, pos, subr) \ return (SCM_UNPACK (gf) \ ? scm_call_generic_2 ((gf), (a1), (a2)) \ : (scm_wrong_type_arg ((subr), (pos), \ (pos) == SCM_ARG1 ? (a1) : (a2)), \ SCM_UNSPECIFIED)) #define SCM_GASSERT2(cond, gf, a1, a2, pos, subr) \ if (SCM_UNLIKELY (!(cond))) \ SCM_WTA_DISPATCH_2((gf), (a1), (a2), (pos), (subr)) SCM_API SCM scm_apply_generic (SCM gf, SCM args); #define SCM_WTA_DISPATCH_n(gf, args, pos, subr) \ return (SCM_UNPACK (gf) \ ? scm_apply_generic ((gf), (args)) \ : (scm_wrong_type_arg ((subr), (pos), \ scm_list_ref ((args), \ scm_from_int ((pos) - 1))), \ SCM_UNSPECIFIED)) #define SCM_GASSERTn(cond, gf, args, pos, subr) \ if (SCM_UNLIKELY (!(cond))) \ SCM_WTA_DISPATCH_n((gf), (args), (pos), (subr)) #ifndef SCM_MAGIC_SNARFER /* Let these macros pass through if we are snarfing; thus we can tell the difference between the use of an actual number vs. the use of one of these macros -- actual numbers in SCM_VALIDATE_* and SCM_ASSERT constructs must match the formal argument name, but using SCM_ARG* avoids the test */ #define SCM_ARGn 0 #define SCM_ARG1 1 #define SCM_ARG2 2 #define SCM_ARG3 3 #define SCM_ARG4 4 #define SCM_ARG5 5 #define SCM_ARG6 6 #define SCM_ARG7 7 #endif /* SCM_MAGIC_SNARFER */ /* SCM_EXIT_SUCCESS is the default code to return from SCM if no errors * were encountered. SCM_EXIT_FAILURE is the default code to return from * SCM if errors were encountered. The return code can be explicitly * specified in a SCM program with (scm_quit ). */ #ifndef SCM_EXIT_SUCCESS #ifdef vms #define SCM_EXIT_SUCCESS 1 #else #define SCM_EXIT_SUCCESS 0 #endif /* def vms */ #endif /* ndef SCM_EXIT_SUCCESS */ #ifndef SCM_EXIT_FAILURE #ifdef vms #define SCM_EXIT_FAILURE 2 #else #define SCM_EXIT_FAILURE 1 #endif /* def vms */ #endif /* ndef SCM_EXIT_FAILURE */ /* Define SCM_C_INLINE_KEYWORD so that it can be used as a replacement for the "inline" keyword, expanding to nothing when "inline" is not available. */ #ifdef SCM_C_INLINE #define SCM_C_INLINE_KEYWORD SCM_C_INLINE #else #define SCM_C_INLINE_KEYWORD #endif /* Handling thread-local storage (TLS). */ #ifdef SCM_HAVE_THREAD_STORAGE_CLASS # define SCM_THREAD_LOCAL __thread #else # define SCM_THREAD_LOCAL #endif #endif /* SCM___SCM_H */ /* Local Variables: c-file-style: "gnu" End: */