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allendowney
GitHub Repository: allendowney/cpython
 Path: blob/main/Modules/_multiprocessing/multiprocessing.h
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#ifndef MULTIPROCESSING_H

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#define MULTIPROCESSING_H

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#include "Python.h"

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#include "structmember.h"

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#include "pythread.h"

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/*

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 * Platform includes and definitions

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 */

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#ifdef MS_WINDOWS

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#  ifndef WIN32_LEAN_AND_MEAN

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#    define WIN32_LEAN_AND_MEAN

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#  endif

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#  include <windows.h>

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#  include <winsock2.h>

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#  include <process.h>               /* getpid() */

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#  ifdef Py_DEBUG

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#    include <crtdbg.h>

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#  endif

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#  define SEM_HANDLE HANDLE

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#  define SEM_VALUE_MAX LONG_MAX

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#  define HAVE_MP_SEMAPHORE

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#else

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#  include <fcntl.h>                 /* O_CREAT and O_EXCL */

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#  if defined(HAVE_SEM_OPEN) && !defined(POSIX_SEMAPHORES_NOT_ENABLED)

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#    define HAVE_MP_SEMAPHORE

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#    include <semaphore.h>

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     typedef sem_t *SEM_HANDLE;

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#  endif

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#endif

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/*

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 * Issue 3110 - Solaris does not define SEM_VALUE_MAX

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 */

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#ifndef SEM_VALUE_MAX

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    #if defined(HAVE_SYSCONF) && defined(_SC_SEM_VALUE_MAX)

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        # define SEM_VALUE_MAX sysconf(_SC_SEM_VALUE_MAX)

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    #elif defined(_SEM_VALUE_MAX)

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        # define SEM_VALUE_MAX _SEM_VALUE_MAX

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    #elif defined(_POSIX_SEM_VALUE_MAX)

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        # define SEM_VALUE_MAX _POSIX_SEM_VALUE_MAX

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    #else

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        # define SEM_VALUE_MAX INT_MAX

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    #endif

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#endif

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/*

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 * Format codes

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 */

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#if SIZEOF_VOID_P == SIZEOF_LONG

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#  define F_POINTER "k"

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#  define T_POINTER T_ULONG

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#elif SIZEOF_VOID_P == SIZEOF_LONG_LONG

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#  define F_POINTER "K"

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#  define T_POINTER T_ULONGLONG

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#else

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#  error "can't find format code for unsigned integer of same size as void*"

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#endif

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#ifdef MS_WINDOWS

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#  define F_HANDLE F_POINTER

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#  define T_HANDLE T_POINTER

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#  define F_SEM_HANDLE F_HANDLE

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#  define T_SEM_HANDLE T_HANDLE

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#else

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#  define F_HANDLE "i"

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#  define T_HANDLE T_INT

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#  define F_SEM_HANDLE F_POINTER

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#  define T_SEM_HANDLE T_POINTER

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#endif

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/*

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 * Error codes which can be returned by functions called without GIL

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 */

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#define MP_SUCCESS (0)

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#define MP_STANDARD_ERROR (-1)

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#define MP_MEMORY_ERROR (-1001)

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#define MP_SOCKET_ERROR (-1002)

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#define MP_EXCEPTION_HAS_BEEN_SET (-1003)

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PyObject *_PyMp_SetError(PyObject *Type, int num);

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/*

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 * Externs - not all will really exist on all platforms

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 */

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extern PyType_Spec _PyMp_SemLockType_spec;

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extern PyObject *_PyMp_sem_unlink(const char *name);

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#endif /* MULTIPROCESSING_H */

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