68 lines
2.0 KiB
C
68 lines
2.0 KiB
C
|
/* Copyright (C) 1995-2019 Free Software Foundation, Inc.
|
||
|
|
This file is part of the GNU C Library.
|
||
|
|
|
||
|
|
The GNU C Library is free software; you can redistribute it and/or
|
||
|
|
modify it under the terms of the GNU Lesser General Public
|
||
|
|
License as published by the Free Software Foundation; either
|
||
|
|
version 2.1 of the License, or (at your option) any later version.
|
||
|
|
|
||
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
||
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
|
|
Lesser General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU Lesser General Public
|
||
|
|
License along with the GNU C Library; if not, see
|
||
|
|
<http://www.gnu.org/licenses/>. */
|
||
|
|
|
||
|
|
#ifndef _SYS_SEM_H
|
||
|
|
#define _SYS_SEM_H 1
|
||
|
|
|
||
|
|
#include <features.h>
|
||
|
|
|
||
|
|
#define __need_size_t
|
||
|
|
#include <stddef.h>
|
||
|
|
|
||
|
|
/* Get common definition of System V style IPC. */
|
||
|
|
#include <sys/ipc.h>
|
||
|
|
|
||
|
|
/* Get system dependent definition of `struct semid_ds' and more. */
|
||
|
|
#include <bits/sem.h>
|
||
|
|
|
||
|
|
#ifdef __USE_GNU
|
||
|
|
# include <bits/types/struct_timespec.h>
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* The following System V style IPC functions implement a semaphore
|
||
|
|
handling. The definition is found in XPG2. */
|
||
|
|
|
||
|
|
/* Structure used for argument to `semop' to describe operations. */
|
||
|
|
struct sembuf
|
||
|
|
{
|
||
|
|
unsigned short int sem_num; /* semaphore number */
|
||
|
|
short int sem_op; /* semaphore operation */
|
||
|
|
short int sem_flg; /* operation flag */
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
__BEGIN_DECLS
|
||
|
|
|
||
|
|
/* Semaphore control operation. */
|
||
|
|
extern int semctl (int __semid, int __semnum, int __cmd, ...) __THROW;
|
||
|
|
|
||
|
|
/* Get semaphore. */
|
||
|
|
extern int semget (key_t __key, int __nsems, int __semflg) __THROW;
|
||
|
|
|
||
|
|
/* Operate on semaphore. */
|
||
|
|
extern int semop (int __semid, struct sembuf *__sops, size_t __nsops) __THROW;
|
||
|
|
|
||
|
|
#ifdef __USE_GNU
|
||
|
|
/* Operate on semaphore with timeout. */
|
||
|
|
extern int semtimedop (int __semid, struct sembuf *__sops, size_t __nsops,
|
||
|
|
const struct timespec *__timeout) __THROW;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
__END_DECLS
|
||
|
|
|
||
|
|
#endif /* sys/sem.h */
|