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be5e8a0103
Move the following private functions and structures to pycore_modsupport.h internal C API: * _PyArg_BadArgument() * _PyArg_CheckPositional() * _PyArg_NoKeywords() * _PyArg_NoPositional() * _PyArg_ParseStack() * _PyArg_ParseStackAndKeywords() * _PyArg_Parser structure * _PyArg_UnpackKeywords() * _PyArg_UnpackKeywordsWithVararg() * _PyArg_UnpackStack() * _Py_ANY_VARARGS() Changes: * Python/getargs.h now includes pycore_modsupport.h to export functions. * clinic.py now adds pycore_modsupport.h when one of these functions is used. * Add pycore_modsupport.h includes when a C extension uses one of these functions. * Define Py_BUILD_CORE_MODULE in C extensions which now include directly or indirectly (via code generated by Argument Clinic) pycore_modsupport.h: * _csv * _curses_panel * _dbm * _gdbm * _multiprocessing.posixshmem * _sqlite.row * _statistics * grp * resource * syslog * _testcapi: bad_get() no longer uses METH_FASTCALL calling convention but METH_VARARGS. Replace _PyArg_UnpackStack() with PyArg_ParseTuple(). * _testcapi: add PYTESTCAPI_NEED_INTERNAL_API macro which is defined by _testcapi sub-modules which need the internal C API (pycore_modsupport.h): exceptions.c, float.c, vectorcall.c, watchers.c. * Remove Include/cpython/modsupport.h header file. Include/modsupport.h no longer includes the removed header file. * Fix mypy clinic.py
136 lines
3.1 KiB
C
136 lines
3.1 KiB
C
/*
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posixshmem - A Python extension that provides shm_open() and shm_unlink()
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*/
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// clinic/posixshmem.c.h uses internal pycore_modsupport.h API
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#ifndef Py_BUILD_CORE_BUILTIN
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# define Py_BUILD_CORE_MODULE 1
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#endif
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#include <Python.h>
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// for shm_open() and shm_unlink()
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#ifdef HAVE_SYS_MMAN_H
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#include <sys/mman.h>
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#endif
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/*[clinic input]
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module _posixshmem
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[clinic start generated code]*/
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/*[clinic end generated code: output=da39a3ee5e6b4b0d input=a416734e49164bf8]*/
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/*
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*
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* Module-level functions & meta stuff
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*
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*/
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#ifdef HAVE_SHM_OPEN
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/*[clinic input]
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_posixshmem.shm_open -> int
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path: unicode
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flags: int
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mode: int = 0o777
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# "shm_open(path, flags, mode=0o777)\n\n\
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Open a shared memory object. Returns a file descriptor (integer).
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[clinic start generated code]*/
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static int
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_posixshmem_shm_open_impl(PyObject *module, PyObject *path, int flags,
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int mode)
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/*[clinic end generated code: output=8d110171a4fa20df input=e83b58fa802fac25]*/
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{
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int fd;
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int async_err = 0;
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const char *name = PyUnicode_AsUTF8(path);
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if (name == NULL) {
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return -1;
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}
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do {
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Py_BEGIN_ALLOW_THREADS
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fd = shm_open(name, flags, mode);
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Py_END_ALLOW_THREADS
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} while (fd < 0 && errno == EINTR && !(async_err = PyErr_CheckSignals()));
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if (fd < 0) {
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if (!async_err)
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PyErr_SetFromErrnoWithFilenameObject(PyExc_OSError, path);
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return -1;
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}
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return fd;
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}
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#endif /* HAVE_SHM_OPEN */
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#ifdef HAVE_SHM_UNLINK
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/*[clinic input]
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_posixshmem.shm_unlink
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path: unicode
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Remove a shared memory object (similar to unlink()).
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Remove a shared memory object name, and, once all processes have unmapped
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the object, de-allocates and destroys the contents of the associated memory
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region.
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[clinic start generated code]*/
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static PyObject *
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_posixshmem_shm_unlink_impl(PyObject *module, PyObject *path)
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/*[clinic end generated code: output=42f8b23d134b9ff5 input=8dc0f87143e3b300]*/
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{
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int rv;
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int async_err = 0;
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const char *name = PyUnicode_AsUTF8(path);
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if (name == NULL) {
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return NULL;
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}
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do {
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Py_BEGIN_ALLOW_THREADS
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rv = shm_unlink(name);
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Py_END_ALLOW_THREADS
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} while (rv < 0 && errno == EINTR && !(async_err = PyErr_CheckSignals()));
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if (rv < 0) {
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if (!async_err)
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PyErr_SetFromErrnoWithFilenameObject(PyExc_OSError, path);
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return NULL;
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}
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Py_RETURN_NONE;
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}
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#endif /* HAVE_SHM_UNLINK */
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#include "clinic/posixshmem.c.h"
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static PyMethodDef module_methods[ ] = {
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_POSIXSHMEM_SHM_OPEN_METHODDEF
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_POSIXSHMEM_SHM_UNLINK_METHODDEF
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{NULL} /* Sentinel */
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};
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static PyModuleDef_Slot module_slots[] = {
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{Py_mod_multiple_interpreters, Py_MOD_PER_INTERPRETER_GIL_SUPPORTED},
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{0, NULL}
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};
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static struct PyModuleDef _posixshmemmodule = {
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PyModuleDef_HEAD_INIT,
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.m_name = "_posixshmem",
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.m_doc = "POSIX shared memory module",
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.m_size = 0,
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.m_methods = module_methods,
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.m_slots = module_slots,
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};
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/* Module init function */
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PyMODINIT_FUNC
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PyInit__posixshmem(void)
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{
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return PyModuleDef_Init(&_posixshmemmodule);
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}
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