mirror of
https://github.com/python/cpython
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0c89056fe5
PyMutex is a one byte lock with fast, inlineable lock and unlock functions for the common uncontended case. The design is based on WebKit's WTF::Lock. PyMutex is built using the _PyParkingLot APIs, which provides a cross-platform futex-like API (based on WebKit's WTF::ParkingLot). This internal API will be used for building other synchronization primitives used to implement PEP 703, such as one-time initialization and events. This also includes tests and a mini benchmark in Tools/lockbench/lockbench.py to compare with the existing PyThread_type_lock. Uncontended acquisition + release: * Linux (x86-64): PyMutex: 11 ns, PyThread_type_lock: 44 ns * macOS (arm64): PyMutex: 13 ns, PyThread_type_lock: 18 ns * Windows (x86-64): PyMutex: 13 ns, PyThread_type_lock: 38 ns PR Overview: The primary purpose of this PR is to implement PyMutex, but there are a number of support pieces (described below). * PyMutex: A 1-byte lock that doesn't require memory allocation to initialize and is generally faster than the existing PyThread_type_lock. The API is internal only for now. * _PyParking_Lot: A futex-like API based on the API of the same name in WebKit. Used to implement PyMutex. * _PyRawMutex: A word sized lock used to implement _PyParking_Lot. * PyEvent: A one time event. This was used a bunch in the "nogil" fork and is useful for testing the PyMutex implementation, so I've included it as part of the PR. * pycore_llist.h: Defines common operations on doubly-linked list. Not strictly necessary (could do the list operations manually), but they come up frequently in the "nogil" fork. ( Similar to https://man.freebsd.org/cgi/man.cgi?queue) --------- Co-authored-by: Eric Snow <ericsnowcurrently@gmail.com>
118 lines
3.1 KiB
C
118 lines
3.1 KiB
C
// Entry point of the Python C API.
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// C extensions should only #include <Python.h>, and not include directly
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// the other Python header files included by <Python.h>.
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#ifndef Py_PYTHON_H
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#define Py_PYTHON_H
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// Since this is a "meta-include" file, "#ifdef __cplusplus / extern "C" {"
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// is not needed.
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// Include Python header files
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#include "patchlevel.h"
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#include "pyconfig.h"
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#include "pymacconfig.h"
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// Include standard header files
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#include <assert.h> // assert()
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#include <inttypes.h> // uintptr_t
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#include <limits.h> // INT_MAX
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#include <math.h> // HUGE_VAL
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#include <stdarg.h> // va_list
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#include <wchar.h> // wchar_t
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#ifdef HAVE_STDDEF_H
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# include <stddef.h> // size_t
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#endif
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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h> // ssize_t
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#endif
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// errno.h, stdio.h, stdlib.h and string.h headers are no longer used by
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// Python, but kept for backward compatibility (avoid compiler warnings).
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// They are no longer included by limited C API version 3.11 and newer.
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#if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 < 0x030b0000
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# include <errno.h> // errno
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# include <stdio.h> // FILE*
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# include <stdlib.h> // getenv()
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# include <string.h> // memcpy()
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#endif
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// Include Python header files
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#include "pyport.h"
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#include "pymacro.h"
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#include "pymath.h"
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#include "pymem.h"
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#include "pytypedefs.h"
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#include "pybuffer.h"
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#include "pystats.h"
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#include "pyatomic.h"
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#include "object.h"
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#include "objimpl.h"
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#include "typeslots.h"
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#include "pyhash.h"
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#include "cpython/pydebug.h"
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#include "bytearrayobject.h"
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#include "bytesobject.h"
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#include "unicodeobject.h"
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#include "longobject.h"
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#include "cpython/longintrepr.h"
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#include "boolobject.h"
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#include "floatobject.h"
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#include "complexobject.h"
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#include "rangeobject.h"
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#include "memoryobject.h"
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#include "tupleobject.h"
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#include "listobject.h"
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#include "dictobject.h"
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#include "cpython/odictobject.h"
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#include "enumobject.h"
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#include "setobject.h"
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#include "methodobject.h"
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#include "moduleobject.h"
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#include "cpython/funcobject.h"
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#include "cpython/classobject.h"
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#include "fileobject.h"
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#include "pycapsule.h"
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#include "cpython/code.h"
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#include "pyframe.h"
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#include "traceback.h"
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#include "sliceobject.h"
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#include "cpython/cellobject.h"
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#include "iterobject.h"
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#include "cpython/initconfig.h"
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#include "pystate.h"
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#include "cpython/genobject.h"
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#include "descrobject.h"
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#include "genericaliasobject.h"
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#include "warnings.h"
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#include "weakrefobject.h"
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#include "structseq.h"
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#include "cpython/picklebufobject.h"
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#include "codecs.h"
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#include "pyerrors.h"
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#include "pythread.h"
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#include "cpython/context.h"
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#include "modsupport.h"
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#include "compile.h"
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#include "pythonrun.h"
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#include "pylifecycle.h"
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#include "ceval.h"
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#include "sysmodule.h"
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#include "osmodule.h"
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#include "intrcheck.h"
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#include "import.h"
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#include "abstract.h"
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#include "bltinmodule.h"
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#include "cpython/pyctype.h"
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#include "pystrtod.h"
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#include "pystrcmp.h"
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#include "fileutils.h"
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#include "cpython/pyfpe.h"
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#include "cpython/tracemalloc.h"
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#include "cpython/optimizer.h"
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#endif /* !Py_PYTHON_H */
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