mirror of https://github.com/python/cpython
bpo-35134: Add Include/cpython/pymem.h (GH-12840)
Move unstable CPython API from Include/pymem.h into a new Include/cpython/pymem.h header file.
This commit is contained in:
Victor Stinner
GitHub
parent
a3283efd30
commit
9820c07e41
|
|
@ -0,0 +1,99 @@
|
|||
#ifndef Py_CPYTHON_PYMEM_H
|
||||
# error "this header file must not be included directly"
|
||||
#endif
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#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);
|
||||
|
||||
/* Configure the Python memory allocators. Pass NULL to use default
|
||||
allocators. */
|
||||
PyAPI_FUNC(int) _PyMem_SetupAllocators(const char *opt);
|
||||
|
||||
/* Try to get the allocators name set by _PyMem_SetupAllocators(). */
|
||||
PyAPI_FUNC(const char*) _PyMem_GetAllocatorsName(void);
|
||||
|
||||
PyAPI_FUNC(void *) PyMem_Calloc(size_t nelem, size_t elsize);
|
||||
|
||||
/* 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 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);
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
102
Include/pymem.h
102
Include/pymem.h
|
|
@ -11,21 +11,6 @@
|
|||
extern "C" {
|
||||
#endif
|
||||
|
||||
#ifndef Py_LIMITED_API
|
||||
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);
|
||||
|
||||
/* Configure the Python memory allocators. Pass NULL to use default
|
||||
allocators. */
|
||||
PyAPI_FUNC(int) _PyMem_SetupAllocators(const char *opt);
|
||||
|
||||
/* Try to get the allocators name set by _PyMem_SetupAllocators(). */
|
||||
PyAPI_FUNC(const char*) _PyMem_GetAllocatorsName(void);
|
||||
#endif /* !defined(Py_LIMITED_API) */
|
||||
|
||||
|
||||
/* BEWARE:
|
||||
|
||||
Each interface exports both functions and macros. Extension modules should
|
||||
|
|
@ -65,23 +50,9 @@ PyAPI_FUNC(const char*) _PyMem_GetAllocatorsName(void);
|
|||
*/
|
||||
|
||||
PyAPI_FUNC(void *) PyMem_Malloc(size_t size);
|
||||
#if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= 0x03050000
|
||||
PyAPI_FUNC(void *) PyMem_Calloc(size_t nelem, size_t elsize);
|
||||
#endif
|
||||
PyAPI_FUNC(void *) PyMem_Realloc(void *ptr, size_t new_size);
|
||||
PyAPI_FUNC(void) PyMem_Free(void *ptr);
|
||||
|
||||
#ifndef Py_LIMITED_API
|
||||
/* 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);
|
||||
#endif
|
||||
|
||||
/* Macros. */
|
||||
|
||||
/* PyMem_MALLOC(0) means malloc(1). Some systems would return NULL
|
||||
|
|
@ -130,72 +101,6 @@ PyAPI_FUNC(wchar_t*) _PyMem_RawWcsdup(const wchar_t *str);
|
|||
#define PyMem_Del PyMem_Free
|
||||
#define PyMem_DEL PyMem_FREE
|
||||
|
||||
#ifndef Py_LIMITED_API
|
||||
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 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);
|
||||
#endif /* Py_LIMITED_API */
|
||||
|
||||
/* bpo-35053: expose _Py_tracemalloc_config for performance:
|
||||
_Py_NewReference() needs an efficient check to test if tracemalloc is
|
||||
tracing.
|
||||
|
|
@ -231,6 +136,13 @@ PyAPI_DATA(struct _PyTraceMalloc_Config) _Py_tracemalloc_config;
|
|||
.max_nframe = 1, \
|
||||
.use_domain = 0}
|
||||
|
||||
|
||||
#ifndef Py_LIMITED_API
|
||||
# define Py_CPYTHON_PYMEM_H
|
||||
# include "cpython/pymem.h"
|
||||
# undef Py_CPYTHON_PYMEM_H
|
||||
#endif
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
|
|
|||
Loading…
Reference in New Issue