python 2.7 -> python 3.14
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96
extern/include/python/pymem.h
vendored
96
extern/include/python/pymem.h
vendored
@@ -1,12 +1,8 @@
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/* The PyMem_ family: low-level memory allocation interfaces.
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See objimpl.h for the PyObject_ memory family.
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*/
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// The PyMem_ family: low-level memory allocation interfaces.
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// See objimpl.h for the PyObject_ memory family.
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#ifndef Py_PYMEM_H
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#define Py_PYMEM_H
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#include "pyport.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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@@ -25,8 +21,8 @@ extern "C" {
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heap used by the Python DLL; it could be a disaster if you free()'ed that
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directly in your own extension. Using PyMem_Free instead ensures Python
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can return the memory to the proper heap. As another example, in
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PYMALLOC_DEBUG mode, Python wraps all calls to all PyMem_ and PyObject_
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memory functions in special debugging wrappers that add additional
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a debug build (Py_DEBUG macro), Python wraps all calls to all PyMem_ and
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PyObject_ memory functions in special debugging wrappers that add additional
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debugging info to dynamic memory blocks. The system routines have no idea
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what to do with that stuff, and the Python wrappers have no idea what to do
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with raw blocks obtained directly by the system routines then.
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@@ -49,35 +45,10 @@ extern "C" {
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performed on failure (no exception is set, no warning is printed, etc).
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*/
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PyAPI_FUNC(void *) PyMem_Malloc(size_t);
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PyAPI_FUNC(void *) PyMem_Realloc(void *, size_t);
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PyAPI_FUNC(void) PyMem_Free(void *);
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/* Starting from Python 1.6, the wrappers Py_{Malloc,Realloc,Free} are
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no longer supported. They used to call PyErr_NoMemory() on failure. */
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/* Macros. */
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#ifdef PYMALLOC_DEBUG
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/* Redirect all memory operations to Python's debugging allocator. */
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#define PyMem_MALLOC _PyMem_DebugMalloc
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#define PyMem_REALLOC _PyMem_DebugRealloc
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#define PyMem_FREE _PyMem_DebugFree
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#else /* ! PYMALLOC_DEBUG */
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/* PyMem_MALLOC(0) means malloc(1). Some systems would return NULL
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for malloc(0), which would be treated as an error. Some platforms
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would return a pointer with no memory behind it, which would break
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pymalloc. To solve these problems, allocate an extra byte. */
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/* Returns NULL to indicate error if a negative size or size larger than
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Py_ssize_t can represent is supplied. Helps prevents security holes. */
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#define PyMem_MALLOC(n) ((size_t)(n) > (size_t)PY_SSIZE_T_MAX ? NULL \
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: malloc((n) ? (n) : 1))
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#define PyMem_REALLOC(p, n) ((size_t)(n) > (size_t)PY_SSIZE_T_MAX ? NULL \
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: realloc((p), (n) ? (n) : 1))
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#define PyMem_FREE free
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#endif /* PYMALLOC_DEBUG */
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PyAPI_FUNC(void *) PyMem_Malloc(size_t size);
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PyAPI_FUNC(void *) PyMem_Calloc(size_t nelem, size_t elsize);
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PyAPI_FUNC(void *) PyMem_Realloc(void *ptr, size_t new_size);
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PyAPI_FUNC(void) PyMem_Free(void *ptr);
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/*
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* Type-oriented memory interface
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@@ -90,11 +61,8 @@ PyAPI_FUNC(void) PyMem_Free(void *);
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*/
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#define PyMem_New(type, n) \
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( ((size_t)(n) > PY_SSIZE_T_MAX / sizeof(type)) ? NULL : \
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( (type *) PyMem_Malloc((n) * sizeof(type)) ) )
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#define PyMem_NEW(type, n) \
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( ((size_t)(n) > PY_SSIZE_T_MAX / sizeof(type)) ? NULL : \
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( (type *) PyMem_MALLOC((n) * sizeof(type)) ) )
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( ((size_t)(n) > PY_SSIZE_T_MAX / sizeof(type)) ? NULL : \
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( (type *) PyMem_Malloc((n) * sizeof(type)) ) )
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/*
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* The value of (p) is always clobbered by this macro regardless of success.
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@@ -103,20 +71,40 @@ PyAPI_FUNC(void) PyMem_Free(void *);
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* caller's memory error handler to not lose track of it.
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*/
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#define PyMem_Resize(p, type, n) \
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( (p) = ((size_t)(n) > PY_SSIZE_T_MAX / sizeof(type)) ? NULL : \
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(type *) PyMem_Realloc((p), (n) * sizeof(type)) )
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#define PyMem_RESIZE(p, type, n) \
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( (p) = ((size_t)(n) > PY_SSIZE_T_MAX / sizeof(type)) ? NULL : \
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(type *) PyMem_REALLOC((p), (n) * sizeof(type)) )
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( (p) = ((size_t)(n) > PY_SSIZE_T_MAX / sizeof(type)) ? NULL : \
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(type *) PyMem_Realloc((p), (n) * sizeof(type)) )
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/* PyMem{Del,DEL} are left over from ancient days, and shouldn't be used
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* anymore. They're just confusing aliases for PyMem_{Free,FREE} now.
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*/
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#define PyMem_Del PyMem_Free
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#define PyMem_DEL PyMem_FREE
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// Deprecated aliases only kept for backward compatibility.
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// PyMem_Del and PyMem_DEL are defined with no parameter to be able to use
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// them as function pointers (ex: dealloc = PyMem_Del).
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#define PyMem_MALLOC(n) PyMem_Malloc((n))
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#define PyMem_NEW(type, n) PyMem_New(type, (n))
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#define PyMem_REALLOC(p, n) PyMem_Realloc((p), (n))
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#define PyMem_RESIZE(p, type, n) PyMem_Resize((p), type, (n))
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#define PyMem_FREE(p) PyMem_Free((p))
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#define PyMem_Del(p) PyMem_Free((p))
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#define PyMem_DEL(p) PyMem_Free((p))
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#if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= 0x030d0000
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// Memory allocator which doesn't require the GIL to be held.
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// Usually, it's just a thin wrapper to functions of the standard C library:
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// malloc(), calloc(), realloc() and free(). The difference is that
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// tracemalloc can track these memory allocations.
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PyAPI_FUNC(void *) PyMem_RawMalloc(size_t size);
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PyAPI_FUNC(void *) PyMem_RawCalloc(size_t nelem, size_t elsize);
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PyAPI_FUNC(void *) PyMem_RawRealloc(void *ptr, size_t new_size);
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PyAPI_FUNC(void) PyMem_RawFree(void *ptr);
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#endif
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#ifndef Py_LIMITED_API
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# define Py_CPYTHON_PYMEM_H
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# include "cpython/pymem.h"
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# undef Py_CPYTHON_PYMEM_H
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* !Py_PYMEM_H */
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#endif // !Py_PYMEM_H
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