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#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);
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);
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