forked from AFPy/python-docs-fr
833 lines
24 KiB
Plaintext
833 lines
24 KiB
Plaintext
# Copyright (C) 2001-2018, Python Software Foundation
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# For licence information, see README file.
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#
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msgid ""
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msgstr ""
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"Project-Id-Version: Python 3\n"
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"Report-Msgid-Bugs-To: \n"
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"POT-Creation-Date: 2020-08-24 09:01+0200\n"
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"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
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"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
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"Language-Team: FRENCH <traductions@lists.afpy.org>\n"
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"Language: fr\n"
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"MIME-Version: 1.0\n"
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"Content-Type: text/plain; charset=UTF-8\n"
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"Content-Transfer-Encoding: 8bit\n"
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#: c-api/memory.rst:8
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msgid "Memory Management"
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msgstr ""
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#: c-api/memory.rst:17
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msgid "Overview"
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msgstr "Aperçu"
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#: c-api/memory.rst:19
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msgid ""
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"Memory management in Python involves a private heap containing all Python "
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"objects and data structures. The management of this private heap is ensured "
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"internally by the *Python memory manager*. The Python memory manager has "
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"different components which deal with various dynamic storage management "
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"aspects, like sharing, segmentation, preallocation or caching."
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msgstr ""
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#: c-api/memory.rst:25
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msgid ""
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"At the lowest level, a raw memory allocator ensures that there is enough "
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"room in the private heap for storing all Python-related data by interacting "
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"with the memory manager of the operating system. On top of the raw memory "
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"allocator, several object-specific allocators operate on the same heap and "
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"implement distinct memory management policies adapted to the peculiarities "
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"of every object type. For example, integer objects are managed differently "
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"within the heap than strings, tuples or dictionaries because integers imply "
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"different storage requirements and speed/space tradeoffs. The Python memory "
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"manager thus delegates some of the work to the object-specific allocators, "
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"but ensures that the latter operate within the bounds of the private heap."
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msgstr ""
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#: c-api/memory.rst:36
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msgid ""
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"It is important to understand that the management of the Python heap is "
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"performed by the interpreter itself and that the user has no control over "
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"it, even if they regularly manipulate object pointers to memory blocks "
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"inside that heap. The allocation of heap space for Python objects and other "
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"internal buffers is performed on demand by the Python memory manager through "
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"the Python/C API functions listed in this document."
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msgstr ""
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#: c-api/memory.rst:49
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msgid ""
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"To avoid memory corruption, extension writers should never try to operate on "
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"Python objects with the functions exported by the C library: :c:func:"
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"`malloc`, :c:func:`calloc`, :c:func:`realloc` and :c:func:`free`. This will "
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"result in mixed calls between the C allocator and the Python memory manager "
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"with fatal consequences, because they implement different algorithms and "
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"operate on different heaps. However, one may safely allocate and release "
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"memory blocks with the C library allocator for individual purposes, as shown "
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"in the following example::"
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msgstr ""
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#: c-api/memory.rst:68
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msgid ""
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"In this example, the memory request for the I/O buffer is handled by the C "
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"library allocator. The Python memory manager is involved only in the "
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"allocation of the bytes object returned as a result."
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msgstr ""
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#: c-api/memory.rst:72
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msgid ""
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"In most situations, however, it is recommended to allocate memory from the "
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"Python heap specifically because the latter is under control of the Python "
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"memory manager. For example, this is required when the interpreter is "
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"extended with new object types written in C. Another reason for using the "
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"Python heap is the desire to *inform* the Python memory manager about the "
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"memory needs of the extension module. Even when the requested memory is used "
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"exclusively for internal, highly-specific purposes, delegating all memory "
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"requests to the Python memory manager causes the interpreter to have a more "
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"accurate image of its memory footprint as a whole. Consequently, under "
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"certain circumstances, the Python memory manager may or may not trigger "
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"appropriate actions, like garbage collection, memory compaction or other "
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"preventive procedures. Note that by using the C library allocator as shown "
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"in the previous example, the allocated memory for the I/O buffer escapes "
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"completely the Python memory manager."
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msgstr ""
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#: c-api/memory.rst:88
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msgid ""
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"The :envvar:`PYTHONMALLOC` environment variable can be used to configure the "
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"memory allocators used by Python."
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msgstr ""
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#: c-api/memory.rst:91
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msgid ""
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"The :envvar:`PYTHONMALLOCSTATS` environment variable can be used to print "
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"statistics of the :ref:`pymalloc memory allocator <pymalloc>` every time a "
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"new pymalloc object arena is created, and on shutdown."
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msgstr ""
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#: c-api/memory.rst:97
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msgid "Raw Memory Interface"
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msgstr ""
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#: c-api/memory.rst:99
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msgid ""
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"The following function sets are wrappers to the system allocator. These "
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"functions are thread-safe, the :term:`GIL <global interpreter lock>` does "
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"not need to be held."
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msgstr ""
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#: c-api/memory.rst:103
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msgid ""
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"The :ref:`default raw memory allocator <default-memory-allocators>` uses the "
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"following functions: :c:func:`malloc`, :c:func:`calloc`, :c:func:`realloc` "
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"and :c:func:`free`; call ``malloc(1)`` (or ``calloc(1, 1)``) when requesting "
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"zero bytes."
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msgstr ""
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#: c-api/memory.rst:112 c-api/memory.rst:183 c-api/memory.rst:285
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msgid ""
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"Allocates *n* bytes and returns a pointer of type :c:type:`void*` to the "
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"allocated memory, or ``NULL`` if the request fails."
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msgstr ""
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#: c-api/memory.rst:115
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msgid ""
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"Requesting zero bytes returns a distinct non-``NULL`` pointer if possible, "
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"as if ``PyMem_RawMalloc(1)`` had been called instead. The memory will not "
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"have been initialized in any way."
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msgstr ""
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#: c-api/memory.rst:122 c-api/memory.rst:193 c-api/memory.rst:295
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msgid ""
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"Allocates *nelem* elements each whose size in bytes is *elsize* and returns "
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"a pointer of type :c:type:`void*` to the allocated memory, or ``NULL`` if "
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"the request fails. The memory is initialized to zeros."
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msgstr ""
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#: c-api/memory.rst:126
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msgid ""
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"Requesting zero elements or elements of size zero bytes returns a distinct "
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"non-``NULL`` pointer if possible, as if ``PyMem_RawCalloc(1, 1)`` had been "
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"called instead."
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msgstr ""
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#: c-api/memory.rst:135 c-api/memory.rst:206 c-api/memory.rst:308
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msgid ""
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"Resizes the memory block pointed to by *p* to *n* bytes. The contents will "
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"be unchanged to the minimum of the old and the new sizes."
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msgstr ""
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#: c-api/memory.rst:138
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msgid ""
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"If *p* is ``NULL``, the call is equivalent to ``PyMem_RawMalloc(n)``; else "
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"if *n* is equal to zero, the memory block is resized but is not freed, and "
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"the returned pointer is non-``NULL``."
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msgstr ""
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#: c-api/memory.rst:142
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msgid ""
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"Unless *p* is ``NULL``, it must have been returned by a previous call to :c:"
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"func:`PyMem_RawMalloc`, :c:func:`PyMem_RawRealloc` or :c:func:"
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"`PyMem_RawCalloc`."
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msgstr ""
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#: c-api/memory.rst:146
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msgid ""
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"If the request fails, :c:func:`PyMem_RawRealloc` returns ``NULL`` and *p* "
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"remains a valid pointer to the previous memory area."
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msgstr ""
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#: c-api/memory.rst:152
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msgid ""
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"Frees the memory block pointed to by *p*, which must have been returned by a "
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"previous call to :c:func:`PyMem_RawMalloc`, :c:func:`PyMem_RawRealloc` or :c:"
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"func:`PyMem_RawCalloc`. Otherwise, or if ``PyMem_RawFree(p)`` has been "
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"called before, undefined behavior occurs."
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msgstr ""
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#: c-api/memory.rst:157 c-api/memory.rst:227 c-api/memory.rst:329
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msgid "If *p* is ``NULL``, no operation is performed."
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msgstr ""
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#: c-api/memory.rst:163
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msgid "Memory Interface"
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msgstr ""
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#: c-api/memory.rst:165 c-api/memory.rst:271
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msgid ""
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"The following function sets, modeled after the ANSI C standard, but "
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"specifying behavior when requesting zero bytes, are available for allocating "
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"and releasing memory from the Python heap."
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msgstr ""
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#: c-api/memory.rst:169
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msgid ""
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"The :ref:`default memory allocator <default-memory-allocators>` uses the :"
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"ref:`pymalloc memory allocator <pymalloc>`."
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msgstr ""
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#: c-api/memory.rst:174 c-api/memory.rst:280
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msgid ""
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"The :term:`GIL <global interpreter lock>` must be held when using these "
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"functions."
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msgstr ""
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#: c-api/memory.rst:179
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msgid ""
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"The default allocator is now pymalloc instead of system :c:func:`malloc`."
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msgstr ""
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#: c-api/memory.rst:186
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msgid ""
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"Requesting zero bytes returns a distinct non-``NULL`` pointer if possible, "
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"as if ``PyMem_Malloc(1)`` had been called instead. The memory will not have "
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"been initialized in any way."
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msgstr ""
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#: c-api/memory.rst:197
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msgid ""
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"Requesting zero elements or elements of size zero bytes returns a distinct "
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"non-``NULL`` pointer if possible, as if ``PyMem_Calloc(1, 1)`` had been "
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"called instead."
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msgstr ""
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#: c-api/memory.rst:209
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msgid ""
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"If *p* is ``NULL``, the call is equivalent to ``PyMem_Malloc(n)``; else if "
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"*n* is equal to zero, the memory block is resized but is not freed, and the "
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"returned pointer is non-``NULL``."
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msgstr ""
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#: c-api/memory.rst:213
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msgid ""
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"Unless *p* is ``NULL``, it must have been returned by a previous call to :c:"
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"func:`PyMem_Malloc`, :c:func:`PyMem_Realloc` or :c:func:`PyMem_Calloc`."
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msgstr ""
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#: c-api/memory.rst:216
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msgid ""
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"If the request fails, :c:func:`PyMem_Realloc` returns ``NULL`` and *p* "
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"remains a valid pointer to the previous memory area."
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msgstr ""
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#: c-api/memory.rst:222
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msgid ""
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"Frees the memory block pointed to by *p*, which must have been returned by a "
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"previous call to :c:func:`PyMem_Malloc`, :c:func:`PyMem_Realloc` or :c:func:"
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"`PyMem_Calloc`. Otherwise, or if ``PyMem_Free(p)`` has been called before, "
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"undefined behavior occurs."
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msgstr ""
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#: c-api/memory.rst:229
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msgid ""
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"The following type-oriented macros are provided for convenience. Note that "
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"*TYPE* refers to any C type."
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msgstr ""
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#: c-api/memory.rst:235
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msgid ""
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"Same as :c:func:`PyMem_Malloc`, but allocates ``(n * sizeof(TYPE))`` bytes "
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"of memory. Returns a pointer cast to :c:type:`TYPE*`. The memory will not "
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"have been initialized in any way."
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msgstr ""
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#: c-api/memory.rst:242
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msgid ""
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"Same as :c:func:`PyMem_Realloc`, but the memory block is resized to ``(n * "
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"sizeof(TYPE))`` bytes. Returns a pointer cast to :c:type:`TYPE*`. On "
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"return, *p* will be a pointer to the new memory area, or ``NULL`` in the "
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"event of failure."
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msgstr ""
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#: c-api/memory.rst:247
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msgid ""
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"This is a C preprocessor macro; *p* is always reassigned. Save the original "
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"value of *p* to avoid losing memory when handling errors."
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msgstr ""
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#: c-api/memory.rst:253
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msgid "Same as :c:func:`PyMem_Free`."
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msgstr ""
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#: c-api/memory.rst:255
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msgid ""
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"In addition, the following macro sets are provided for calling the Python "
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"memory allocator directly, without involving the C API functions listed "
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"above. However, note that their use does not preserve binary compatibility "
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"across Python versions and is therefore deprecated in extension modules."
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msgstr ""
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#: c-api/memory.rst:260
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msgid "``PyMem_MALLOC(size)``"
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msgstr ""
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#: c-api/memory.rst:261
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msgid "``PyMem_NEW(type, size)``"
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msgstr ""
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#: c-api/memory.rst:262
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msgid "``PyMem_REALLOC(ptr, size)``"
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msgstr ""
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#: c-api/memory.rst:263
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msgid "``PyMem_RESIZE(ptr, type, size)``"
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msgstr ""
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#: c-api/memory.rst:264
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msgid "``PyMem_FREE(ptr)``"
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msgstr ""
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#: c-api/memory.rst:265
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msgid "``PyMem_DEL(ptr)``"
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msgstr ""
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#: c-api/memory.rst:269
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msgid "Object allocators"
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msgstr ""
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#: c-api/memory.rst:275
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msgid ""
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"The :ref:`default object allocator <default-memory-allocators>` uses the :"
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"ref:`pymalloc memory allocator <pymalloc>`."
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msgstr ""
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#: c-api/memory.rst:288
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msgid ""
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"Requesting zero bytes returns a distinct non-``NULL`` pointer if possible, "
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"as if ``PyObject_Malloc(1)`` had been called instead. The memory will not "
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"have been initialized in any way."
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msgstr ""
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#: c-api/memory.rst:299
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msgid ""
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"Requesting zero elements or elements of size zero bytes returns a distinct "
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"non-``NULL`` pointer if possible, as if ``PyObject_Calloc(1, 1)`` had been "
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"called instead."
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msgstr ""
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#: c-api/memory.rst:311
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msgid ""
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"If *p* is ``NULL``, the call is equivalent to ``PyObject_Malloc(n)``; else "
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"if *n* is equal to zero, the memory block is resized but is not freed, and "
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"the returned pointer is non-``NULL``."
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msgstr ""
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#: c-api/memory.rst:315
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msgid ""
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"Unless *p* is ``NULL``, it must have been returned by a previous call to :c:"
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"func:`PyObject_Malloc`, :c:func:`PyObject_Realloc` or :c:func:"
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"`PyObject_Calloc`."
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msgstr ""
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#: c-api/memory.rst:318
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msgid ""
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"If the request fails, :c:func:`PyObject_Realloc` returns ``NULL`` and *p* "
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"remains a valid pointer to the previous memory area."
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msgstr ""
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#: c-api/memory.rst:324
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msgid ""
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"Frees the memory block pointed to by *p*, which must have been returned by a "
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"previous call to :c:func:`PyObject_Malloc`, :c:func:`PyObject_Realloc` or :c:"
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"func:`PyObject_Calloc`. Otherwise, or if ``PyObject_Free(p)`` has been "
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"called before, undefined behavior occurs."
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msgstr ""
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#: c-api/memory.rst:335
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msgid "Default Memory Allocators"
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msgstr ""
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#: c-api/memory.rst:337
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msgid "Default memory allocators:"
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msgstr ""
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#: c-api/memory.rst:340
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msgid "Configuration"
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msgstr "Configuration"
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#: c-api/memory.rst:340
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msgid "Name"
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msgstr "Nom"
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#: c-api/memory.rst:340
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msgid "PyMem_RawMalloc"
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msgstr ""
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#: c-api/memory.rst:340
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msgid "PyMem_Malloc"
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msgstr ""
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#: c-api/memory.rst:340
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msgid "PyObject_Malloc"
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msgstr ""
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#: c-api/memory.rst:342
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msgid "Release build"
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msgstr ""
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#: c-api/memory.rst:342
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msgid "``\"pymalloc\"``"
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msgstr ""
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#: c-api/memory.rst:342 c-api/memory.rst:344
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msgid "``malloc``"
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msgstr ""
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#: c-api/memory.rst:342
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msgid "``pymalloc``"
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msgstr ""
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#: c-api/memory.rst:343
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msgid "Debug build"
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msgstr ""
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#: c-api/memory.rst:343
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msgid "``\"pymalloc_debug\"``"
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msgstr ""
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#: c-api/memory.rst:343 c-api/memory.rst:345
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msgid "``malloc`` + debug"
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msgstr ""
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#: c-api/memory.rst:343
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msgid "``pymalloc`` + debug"
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msgstr ""
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#: c-api/memory.rst:344
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msgid "Release build, without pymalloc"
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msgstr ""
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#: c-api/memory.rst:344
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msgid "``\"malloc\"``"
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msgstr ""
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#: c-api/memory.rst:345
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msgid "Debug build, without pymalloc"
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msgstr ""
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#: c-api/memory.rst:345
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msgid "``\"malloc_debug\"``"
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msgstr ""
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#: c-api/memory.rst:348
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msgid "Legend:"
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msgstr ""
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#: c-api/memory.rst:350
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msgid "Name: value for :envvar:`PYTHONMALLOC` environment variable"
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msgstr ""
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#: c-api/memory.rst:351
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msgid ""
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"``malloc``: system allocators from the standard C library, C functions: :c:"
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"func:`malloc`, :c:func:`calloc`, :c:func:`realloc` and :c:func:`free`"
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msgstr ""
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#: c-api/memory.rst:353
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msgid "``pymalloc``: :ref:`pymalloc memory allocator <pymalloc>`"
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msgstr ""
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#: c-api/memory.rst:354
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msgid ""
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"\"+ debug\": with debug hooks installed by :c:func:`PyMem_SetupDebugHooks`"
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msgstr ""
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#: c-api/memory.rst:358
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msgid "Customize Memory Allocators"
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msgstr ""
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#: c-api/memory.rst:364
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msgid ""
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"Structure used to describe a memory block allocator. The structure has four "
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"fields:"
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msgstr ""
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#: c-api/memory.rst:368 c-api/memory.rst:513
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msgid "Field"
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msgstr "Champ"
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#: c-api/memory.rst:368 c-api/memory.rst:513
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msgid "Meaning"
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msgstr "Signification"
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#: c-api/memory.rst:370 c-api/memory.rst:515
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msgid "``void *ctx``"
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msgstr "``void *ctx``"
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|
|
#: c-api/memory.rst:370 c-api/memory.rst:515
|
|
msgid "user context passed as first argument"
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:372
|
|
msgid "``void* malloc(void *ctx, size_t size)``"
|
|
msgstr "``void* malloc(void *ctx, size_t size)``"
|
|
|
|
#: c-api/memory.rst:372
|
|
msgid "allocate a memory block"
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:374
|
|
msgid "``void* calloc(void *ctx, size_t nelem, size_t elsize)``"
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:374
|
|
msgid "allocate a memory block initialized with zeros"
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:377
|
|
msgid "``void* realloc(void *ctx, void *ptr, size_t new_size)``"
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:377
|
|
msgid "allocate or resize a memory block"
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:379
|
|
msgid "``void free(void *ctx, void *ptr)``"
|
|
msgstr "``void free(void *ctx, void *ptr)``"
|
|
|
|
#: c-api/memory.rst:379
|
|
msgid "free a memory block"
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:382
|
|
msgid ""
|
|
"The :c:type:`PyMemAllocator` structure was renamed to :c:type:"
|
|
"`PyMemAllocatorEx` and a new ``calloc`` field was added."
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:389
|
|
msgid "Enum used to identify an allocator domain. Domains:"
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:393 c-api/memory.rst:402 c-api/memory.rst:411
|
|
#, fuzzy
|
|
msgid "Functions:"
|
|
msgstr "Fonctions"
|
|
|
|
#: c-api/memory.rst:395
|
|
#, fuzzy
|
|
msgid ":c:func:`PyMem_RawMalloc`"
|
|
msgstr ":c:func:`PyMem_RawCalloc`,"
|
|
|
|
#: c-api/memory.rst:396
|
|
#, fuzzy
|
|
msgid ":c:func:`PyMem_RawRealloc`"
|
|
msgstr ":c:func:`PyMem_RawCalloc`,"
|
|
|
|
#: c-api/memory.rst:397
|
|
#, fuzzy
|
|
msgid ":c:func:`PyMem_RawCalloc`"
|
|
msgstr ":c:func:`PyMem_RawCalloc`,"
|
|
|
|
#: c-api/memory.rst:398
|
|
msgid ":c:func:`PyMem_RawFree`"
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:404
|
|
#, fuzzy
|
|
msgid ":c:func:`PyMem_Malloc`,"
|
|
msgstr ":c:func:`PyMem_Calloc`,"
|
|
|
|
#: c-api/memory.rst:405
|
|
#, fuzzy
|
|
msgid ":c:func:`PyMem_Realloc`"
|
|
msgstr ":c:func:`PyMem_Calloc`,"
|
|
|
|
#: c-api/memory.rst:406
|
|
#, fuzzy
|
|
msgid ":c:func:`PyMem_Calloc`"
|
|
msgstr ":c:func:`PyMem_Calloc`,"
|
|
|
|
#: c-api/memory.rst:407
|
|
msgid ":c:func:`PyMem_Free`"
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:413
|
|
msgid ":c:func:`PyObject_Malloc`"
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:414
|
|
msgid ":c:func:`PyObject_Realloc`"
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:415
|
|
msgid ":c:func:`PyObject_Calloc`"
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:416
|
|
msgid ":c:func:`PyObject_Free`"
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:420
|
|
msgid "Get the memory block allocator of the specified domain."
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:425
|
|
msgid "Set the memory block allocator of the specified domain."
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:427
|
|
msgid ""
|
|
"The new allocator must return a distinct non-``NULL`` pointer when "
|
|
"requesting zero bytes."
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:430
|
|
msgid ""
|
|
"For the :c:data:`PYMEM_DOMAIN_RAW` domain, the allocator must be thread-"
|
|
"safe: the :term:`GIL <global interpreter lock>` is not held when the "
|
|
"allocator is called."
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:434
|
|
msgid ""
|
|
"If the new allocator is not a hook (does not call the previous allocator), "
|
|
"the :c:func:`PyMem_SetupDebugHooks` function must be called to reinstall the "
|
|
"debug hooks on top on the new allocator."
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:441
|
|
msgid "Setup hooks to detect bugs in the Python memory allocator functions."
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:443
|
|
msgid ""
|
|
"Newly allocated memory is filled with the byte ``0xCD`` (``CLEANBYTE``), "
|
|
"freed memory is filled with the byte ``0xDD`` (``DEADBYTE``). Memory blocks "
|
|
"are surrounded by \"forbidden bytes\" (``FORBIDDENBYTE``: byte ``0xFD``)."
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:447
|
|
msgid "Runtime checks:"
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:449
|
|
msgid ""
|
|
"Detect API violations, ex: :c:func:`PyObject_Free` called on a buffer "
|
|
"allocated by :c:func:`PyMem_Malloc`"
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:451
|
|
msgid "Detect write before the start of the buffer (buffer underflow)"
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:452
|
|
msgid "Detect write after the end of the buffer (buffer overflow)"
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:453
|
|
msgid ""
|
|
"Check that the :term:`GIL <global interpreter lock>` is held when allocator "
|
|
"functions of :c:data:`PYMEM_DOMAIN_OBJ` (ex: :c:func:`PyObject_Malloc`) and :"
|
|
"c:data:`PYMEM_DOMAIN_MEM` (ex: :c:func:`PyMem_Malloc`) domains are called"
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:458
|
|
msgid ""
|
|
"On error, the debug hooks use the :mod:`tracemalloc` module to get the "
|
|
"traceback where a memory block was allocated. The traceback is only "
|
|
"displayed if :mod:`tracemalloc` is tracing Python memory allocations and the "
|
|
"memory block was traced."
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:463
|
|
msgid ""
|
|
"These hooks are :ref:`installed by default <default-memory-allocators>` if "
|
|
"Python is compiled in debug mode. The :envvar:`PYTHONMALLOC` environment "
|
|
"variable can be used to install debug hooks on a Python compiled in release "
|
|
"mode."
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:468
|
|
msgid ""
|
|
"This function now also works on Python compiled in release mode. On error, "
|
|
"the debug hooks now use :mod:`tracemalloc` to get the traceback where a "
|
|
"memory block was allocated. The debug hooks now also check if the GIL is "
|
|
"held when functions of :c:data:`PYMEM_DOMAIN_OBJ` and :c:data:"
|
|
"`PYMEM_DOMAIN_MEM` domains are called."
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:475
|
|
msgid ""
|
|
"Byte patterns ``0xCB`` (``CLEANBYTE``), ``0xDB`` (``DEADBYTE``) and ``0xFB`` "
|
|
"(``FORBIDDENBYTE``) have been replaced with ``0xCD``, ``0xDD`` and ``0xFD`` "
|
|
"to use the same values than Windows CRT debug ``malloc()`` and ``free()``."
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:485
|
|
msgid "The pymalloc allocator"
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:487
|
|
msgid ""
|
|
"Python has a *pymalloc* allocator optimized for small objects (smaller or "
|
|
"equal to 512 bytes) with a short lifetime. It uses memory mappings called "
|
|
"\"arenas\" with a fixed size of 256 KiB. It falls back to :c:func:"
|
|
"`PyMem_RawMalloc` and :c:func:`PyMem_RawRealloc` for allocations larger than "
|
|
"512 bytes."
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:492
|
|
msgid ""
|
|
"*pymalloc* is the :ref:`default allocator <default-memory-allocators>` of "
|
|
"the :c:data:`PYMEM_DOMAIN_MEM` (ex: :c:func:`PyMem_Malloc`) and :c:data:"
|
|
"`PYMEM_DOMAIN_OBJ` (ex: :c:func:`PyObject_Malloc`) domains."
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:496
|
|
msgid "The arena allocator uses the following functions:"
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:498
|
|
msgid ":c:func:`VirtualAlloc` and :c:func:`VirtualFree` on Windows,"
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:499
|
|
msgid ":c:func:`mmap` and :c:func:`munmap` if available,"
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:500
|
|
msgid ":c:func:`malloc` and :c:func:`free` otherwise."
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:503
|
|
msgid "Customize pymalloc Arena Allocator"
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:509
|
|
msgid ""
|
|
"Structure used to describe an arena allocator. The structure has three "
|
|
"fields:"
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:517
|
|
msgid "``void* alloc(void *ctx, size_t size)``"
|
|
msgstr "``void* alloc(void *ctx, size_t size)``"
|
|
|
|
#: c-api/memory.rst:517
|
|
msgid "allocate an arena of size bytes"
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:519
|
|
msgid "``void free(void *ctx, size_t size, void *ptr)``"
|
|
msgstr "``void free(void *ctx, size_t size, void *ptr)``"
|
|
|
|
#: c-api/memory.rst:519
|
|
msgid "free an arena"
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:524
|
|
msgid "Get the arena allocator."
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:528
|
|
msgid "Set the arena allocator."
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:532
|
|
msgid "tracemalloc C API"
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:538
|
|
msgid "Track an allocated memory block in the :mod:`tracemalloc` module."
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:540
|
|
msgid ""
|
|
"Return ``0`` on success, return ``-1`` on error (failed to allocate memory "
|
|
"to store the trace). Return ``-2`` if tracemalloc is disabled."
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:543
|
|
msgid "If memory block is already tracked, update the existing trace."
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:547
|
|
msgid ""
|
|
"Untrack an allocated memory block in the :mod:`tracemalloc` module. Do "
|
|
"nothing if the block was not tracked."
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:550
|
|
msgid "Return ``-2`` if tracemalloc is disabled, otherwise return ``0``."
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:556
|
|
msgid "Examples"
|
|
msgstr "Exemples"
|
|
|
|
#: c-api/memory.rst:558
|
|
msgid ""
|
|
"Here is the example from section :ref:`memoryoverview`, rewritten so that "
|
|
"the I/O buffer is allocated from the Python heap by using the first function "
|
|
"set::"
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:571
|
|
msgid "The same code using the type-oriented function set::"
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:583
|
|
msgid ""
|
|
"Note that in the two examples above, the buffer is always manipulated via "
|
|
"functions belonging to the same set. Indeed, it is required to use the same "
|
|
"memory API family for a given memory block, so that the risk of mixing "
|
|
"different allocators is reduced to a minimum. The following code sequence "
|
|
"contains two errors, one of which is labeled as *fatal* because it mixes two "
|
|
"different allocators operating on different heaps. ::"
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:598
|
|
msgid ""
|
|
"In addition to the functions aimed at handling raw memory blocks from the "
|
|
"Python heap, objects in Python are allocated and released with :c:func:"
|
|
"`PyObject_New`, :c:func:`PyObject_NewVar` and :c:func:`PyObject_Del`."
|
|
msgstr ""
|
|
|
|
#: c-api/memory.rst:602
|
|
msgid ""
|
|
"These will be explained in the next chapter on defining and implementing new "
|
|
"object types in C."
|
|
msgstr ""
|