libxml2 Reference Manual |
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xmlmemory - interface for the memory allocator
provides interfaces for the memory allocator, including debugging capabilities.
Author(s): Daniel Veillard
void xmlCleanupMemory (void); typedef void xmlFreeFunc (void * mem); int xmlGcMemGet (xmlFreeFunc * freeFunc,
xmlMallocFunc * mallocFunc,
xmlMallocFunc * mallocAtomicFunc,
xmlReallocFunc * reallocFunc,
xmlStrdupFunc * strdupFunc); int xmlGcMemSetup (xmlFreeFunc freeFunc,
xmlMallocFunc mallocFunc,
xmlMallocFunc mallocAtomicFunc,
xmlReallocFunc reallocFunc,
xmlStrdupFunc strdupFunc); int xmlInitMemory (void); void * xmlMallocAtomicLoc (size_t size,
const char * file,
int line); typedef void * xmlMallocFunc (size_t size); void * xmlMallocLoc (size_t size,
const char * file,
int line); int xmlMemBlocks (void); void xmlMemDisplay (FILE * fp); void xmlMemDisplayLast (FILE * fp,
long nbBytes); void xmlMemFree (void * ptr); int xmlMemGet (xmlFreeFunc * freeFunc,
xmlMallocFunc * mallocFunc,
xmlReallocFunc * reallocFunc,
xmlStrdupFunc * strdupFunc); void * xmlMemMalloc (size_t size); void * xmlMemRealloc (void * ptr,
size_t size); int xmlMemSetup (xmlFreeFunc freeFunc,
xmlMallocFunc mallocFunc,
xmlReallocFunc reallocFunc,
xmlStrdupFunc strdupFunc); void xmlMemShow (FILE * fp,
int nr); size_t xmlMemSize (void * ptr); char * xmlMemStrdupLoc (const char * str,
const char * file,
int line); int xmlMemUsed (void); void xmlMemoryDump (void); char * xmlMemoryStrdup (const char * str); typedef void * xmlReallocFunc (void * mem,
size_t size); void * xmlReallocLoc (void * ptr,
size_t size,
const char * file,
int line); typedef char * xmlStrdupFunc (const char * str);
void xmlFreeFunc (void * mem)
Signature for a free() implementation.
mem: | an already allocated block of memory |
void * xmlMallocFunc (size_t size)
Signature for a malloc() implementation.
size: | the size requested in bytes |
Returns: | a pointer to the newly allocated block or NULL in case of error. |
void * xmlReallocFunc (void * mem,
size_t size)
Signature for a realloc() implementation.
mem: | an already allocated block of memory |
size: | the new size requested in bytes |
Returns: | a pointer to the newly reallocated block or NULL in case of error. |
char * xmlStrdupFunc (const char * str)
Signature for an strdup() implementation.
str: | a zero terminated string |
Returns: | the copy of the string or NULL in case of error. |
xmlFreeFunc xmlFree;
@mem: an already allocated block of memory The variable holding the libxml free() implementation
xmlMallocFunc xmlMalloc;
@size: the size requested in bytes The variable holding the libxml malloc() implementation Returns a pointer to the newly allocated block or NULL in case of error
xmlMallocFunc xmlMallocAtomic;
@size: the size requested in bytes The variable holding the libxml malloc() implementation for atomic data (i.e. blocks not containing pointers), useful when using a garbage collecting allocator. Returns a pointer to the newly allocated block or NULL in case of error
xmlStrdupFunc xmlMemStrdup;
@str: a zero terminated string The variable holding the libxml strdup() implementation Returns the copy of the string or NULL in case of error
xmlReallocFunc xmlRealloc;
@mem: an already allocated block of memory @size: the new size requested in bytes The variable holding the libxml realloc() implementation Returns a pointer to the newly reallocated block or NULL in case of error
void xmlCleanupMemory (void)
DEPRECATED: This function is a no-op. Call xmlCleanupParser to free global state but see the warnings there. xmlCleanupParser should be only called once at program exit. In most cases, you don't have call cleanup functions at all.
int xmlGcMemGet (xmlFreeFunc * freeFunc,
xmlMallocFunc * mallocFunc,
xmlMallocFunc * mallocAtomicFunc,
xmlReallocFunc * reallocFunc,
xmlStrdupFunc * strdupFunc)
Provides the memory access functions set currently in use The mallocAtomicFunc is specialized for atomic block allocations (i.e. of areas useful for garbage collected memory allocators
freeFunc: | place to save the free() function in use |
mallocFunc: | place to save the malloc() function in use |
mallocAtomicFunc: | place to save the atomic malloc() function in use |
reallocFunc: | place to save the realloc() function in use |
strdupFunc: | place to save the strdup() function in use |
Returns: | 0 on success |
int xmlGcMemSetup (xmlFreeFunc freeFunc,
xmlMallocFunc mallocFunc,
xmlMallocFunc mallocAtomicFunc,
xmlReallocFunc reallocFunc,
xmlStrdupFunc strdupFunc)
Override the default memory access functions with a new set This has to be called before any other libxml routines ! The mallocAtomicFunc is specialized for atomic block allocations (i.e. of areas useful for garbage collected memory allocators Should this be blocked if there was already some allocations done ?
freeFunc: | the free() function to use |
mallocFunc: | the malloc() function to use |
mallocAtomicFunc: | the malloc() function to use for atomic allocations |
reallocFunc: | the realloc() function to use |
strdupFunc: | the strdup() function to use |
Returns: | 0 on success |
void * xmlMallocAtomicLoc (size_t size,
const char * file,
int line)
a malloc() equivalent, with logging of the allocation info.
size: | an unsigned int specifying the size in byte to allocate. |
file: | the file name or NULL |
line: | the line number |
Returns: | a pointer to the allocated area or NULL in case of lack of memory. |
void * xmlMallocLoc (size_t size,
const char * file,
int line)
a malloc() equivalent, with logging of the allocation info.
size: | an int specifying the size in byte to allocate. |
file: | the file name or NULL |
line: | the line number |
Returns: | a pointer to the allocated area or NULL in case of lack of memory. |
int xmlMemBlocks (void)
Provides the number of memory areas currently allocated
Returns: | an int representing the number of blocks |
void xmlMemDisplay (FILE * fp)
show in-extenso the memory blocks allocated
fp: | a FILE descriptor used as the output file, if NULL, the result is written to the file .memorylist |
void xmlMemDisplayLast (FILE * fp,
long nbBytes)
the last nbBytes of memory allocated and not freed, useful for dumping the memory left allocated between two places at runtime.
fp: | a FILE descriptor used as the output file, if NULL, the result is written to the file .memorylist |
nbBytes: | the amount of memory to dump |
void xmlMemFree (void * ptr)
a free() equivalent, with error checking.
ptr: | the memory block pointer |
int xmlMemGet (xmlFreeFunc * freeFunc,
xmlMallocFunc * mallocFunc,
xmlReallocFunc * reallocFunc,
xmlStrdupFunc * strdupFunc)
Provides the memory access functions set currently in use
freeFunc: | place to save the free() function in use |
mallocFunc: | place to save the malloc() function in use |
reallocFunc: | place to save the realloc() function in use |
strdupFunc: | place to save the strdup() function in use |
Returns: | 0 on success |
void * xmlMemMalloc (size_t size)
a malloc() equivalent, with logging of the allocation info.
size: | an int specifying the size in byte to allocate. |
Returns: | a pointer to the allocated area or NULL in case of lack of memory. |
void * xmlMemRealloc (void * ptr,
size_t size)
a realloc() equivalent, with logging of the allocation info.
ptr: | the initial memory block pointer |
size: | an int specifying the size in byte to allocate. |
Returns: | a pointer to the allocated area or NULL in case of lack of memory. |
int xmlMemSetup (xmlFreeFunc freeFunc,
xmlMallocFunc mallocFunc,
xmlReallocFunc reallocFunc,
xmlStrdupFunc strdupFunc)
Override the default memory access functions with a new set This has to be called before any other libxml routines ! Should this be blocked if there was already some allocations done ?
freeFunc: | the free() function to use |
mallocFunc: | the malloc() function to use |
reallocFunc: | the realloc() function to use |
strdupFunc: | the strdup() function to use |
Returns: | 0 on success |
void xmlMemShow (FILE * fp,
int nr)
show a show display of the memory allocated, and dump the @nr last allocated areas which were not freed
fp: | a FILE descriptor used as the output file |
nr: | number of entries to dump |
size_t xmlMemSize (void * ptr)
ptr: | pointer to the memory allocation |
Returns: | the size of a memory allocation. |
char * xmlMemStrdupLoc (const char * str,
const char * file,
int line)
a strdup() equivalent, with logging of the allocation info.
str: | the initial string pointer |
file: | the file name or NULL |
line: | the line number |
Returns: | a pointer to the new string or NULL if allocation error occurred. |
int xmlMemUsed (void)
Provides the amount of memory currently allocated
Returns: | an int representing the amount of memory allocated. |
void xmlMemoryDump (void)
Dump in-extenso the memory blocks allocated to the file .memorylist
char * xmlMemoryStrdup (const char * str)
a strdup() equivalent, with logging of the allocation info.
str: | the initial string pointer |
Returns: | a pointer to the new string or NULL if allocation error occurred. |
void * xmlReallocLoc (void * ptr,
size_t size,
const char * file,
int line)
a realloc() equivalent, with logging of the allocation info.
ptr: | the initial memory block pointer |
size: | an int specifying the size in byte to allocate. |
file: | the file name or NULL |
line: | the line number |
Returns: | a pointer to the allocated area or NULL in case of lack of memory. |