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pymem.h
#ifndef Py_CPYTHON_PYMEM_H # error "this header file must not be included directly" #endif PyAPI_FUNC(void *) PyMem_RawMalloc(size_t size); PyAPI_FUNC(void *) PyMem_RawCalloc(size_t nelem, size_t elsize); PyAPI_FUNC(void *) PyMem_RawRealloc(void *ptr, size_t new_size); PyAPI_FUNC(void) PyMem_RawFree(void *ptr); /* Try to get the allocators name set by _PyMem_SetupAllocators(). */ PyAPI_FUNC(const char*) _PyMem_GetCurrentAllocatorName(void); /* strdup() using PyMem_RawMalloc() */ PyAPI_FUNC(char *) _PyMem_RawStrdup(const char *str); /* strdup() using PyMem_Malloc() */ PyAPI_FUNC(char *) _PyMem_Strdup(const char *str); /* wcsdup() using PyMem_RawMalloc() */ PyAPI_FUNC(wchar_t*) _PyMem_RawWcsdup(const wchar_t *str); typedef enum { /* PyMem_RawMalloc(), PyMem_RawRealloc() and PyMem_RawFree() */ PYMEM_DOMAIN_RAW, /* PyMem_Malloc(), PyMem_Realloc() and PyMem_Free() */ PYMEM_DOMAIN_MEM, /* PyObject_Malloc(), PyObject_Realloc() and PyObject_Free() */ PYMEM_DOMAIN_OBJ } PyMemAllocatorDomain; typedef enum { PYMEM_ALLOCATOR_NOT_SET = 0, PYMEM_ALLOCATOR_DEFAULT = 1, PYMEM_ALLOCATOR_DEBUG = 2, PYMEM_ALLOCATOR_MALLOC = 3, PYMEM_ALLOCATOR_MALLOC_DEBUG = 4, #ifdef WITH_PYMALLOC PYMEM_ALLOCATOR_PYMALLOC = 5, PYMEM_ALLOCATOR_PYMALLOC_DEBUG = 6, #endif } PyMemAllocatorName; typedef struct { /* user context passed as the first argument to the 4 functions */ void *ctx; /* allocate a memory block */ void* (*malloc) (void *ctx, size_t size); /* allocate a memory block initialized by zeros */ void* (*calloc) (void *ctx, size_t nelem, size_t elsize); /* allocate or resize a memory block */ void* (*realloc) (void *ctx, void *ptr, size_t new_size); /* release a memory block */ void (*free) (void *ctx, void *ptr); } PyMemAllocatorEx; /* Get the memory block allocator of the specified domain. */ PyAPI_FUNC(void) PyMem_GetAllocator(PyMemAllocatorDomain domain, PyMemAllocatorEx *allocator); /* Set the memory block allocator of the specified domain. The new allocator must return a distinct non-NULL pointer when requesting zero bytes. For the PYMEM_DOMAIN_RAW domain, the allocator must be thread-safe: the GIL is not held when the allocator is called. If the new allocator is not a hook (don't call the previous allocator), the PyMem_SetupDebugHooks() function must be called to reinstall the debug hooks on top on the new allocator. */ PyAPI_FUNC(void) PyMem_SetAllocator(PyMemAllocatorDomain domain, PyMemAllocatorEx *allocator); /* Setup hooks to detect bugs in the following Python memory allocator functions: - PyMem_RawMalloc(), PyMem_RawRealloc(), PyMem_RawFree() - PyMem_Malloc(), PyMem_Realloc(), PyMem_Free() - PyObject_Malloc(), PyObject_Realloc() and PyObject_Free() Newly allocated memory is filled with the byte 0xCB, freed memory is filled with the byte 0xDB. Additional checks: - detect API violations, ex: PyObject_Free() called on a buffer allocated by PyMem_Malloc() - detect write before the start of the buffer (buffer underflow) - detect write after the end of the buffer (buffer overflow) The function does nothing if Python is not compiled is debug mode. */ PyAPI_FUNC(void) PyMem_SetupDebugHooks(void);