mirror of
https://sourceware.org/git/glibc.git
synced 2025-10-30 10:45:40 +03:00
58 lines
1.7 KiB
C
58 lines
1.7 KiB
C
/* Copyright (C) 1995-2013 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
|
|
|
|
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/>. */
|
|
|
|
#include <errno.h>
|
|
#include <stdarg.h>
|
|
#include <sys/sem.h>
|
|
#include <ipc_priv.h>
|
|
|
|
#include <sysdep.h>
|
|
#include <sys/syscall.h>
|
|
|
|
/* Define a `union semun' suitable for Linux here. */
|
|
union semun
|
|
{
|
|
int val; /* value for SETVAL */
|
|
struct semid_ds *buf; /* buffer for IPC_STAT & IPC_SET */
|
|
unsigned short int *array; /* array for GETALL & SETALL */
|
|
struct seminfo *__buf; /* buffer for IPC_INFO */
|
|
};
|
|
|
|
#include <bp-checks.h>
|
|
#include <bp-semctl.h> /* definition of CHECK_SEMCTL needs union semum */
|
|
|
|
/* Return identifier for array of NSEMS semaphores associated with
|
|
KEY. */
|
|
|
|
int
|
|
semctl (int semid, int semnum, int cmd, ...)
|
|
{
|
|
union semun arg;
|
|
va_list ap;
|
|
|
|
va_start (ap, cmd);
|
|
|
|
/* Get the argument. */
|
|
arg = va_arg (ap, union semun);
|
|
|
|
va_end (ap);
|
|
|
|
return INLINE_SYSCALL (ipc, 5, IPCOP_semctl, semid, semnum, cmd,
|
|
CHECK_SEMCTL (&arg, semid, cmd)->array);
|
|
}
|