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/* atomic_posix_sem.c: This file supplies an emulation for atomic operations using
* POSIX semaphores.
*
* Copyright 2010 DResearch Digital Media Systems GmbH
*
* This file is part of the rsyslog runtime library.
*
* The rsyslog runtime 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 3 of the License, or
* (at your option) any later version.
*
* The rsyslog runtime 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 rsyslog runtime library. If not, see <http://www.gnu.org/licenses/>.
*
* A copy of the GPL can be found in the file "COPYING" in this distribution.
* A copy of the LGPL can be found in the file "COPYING.LESSER" in this distribution.
*/
#include "config.h"
#ifndef HAVE_ATOMIC_BUILTINS
#ifdef HAVE_SEMAPHORE_H
#include <semaphore.h>
#include <errno.h>
#include "atomic.h"
#include "rsyslog.h"
#include "srUtils.h"
sem_t atomicSem;
rsRetVal
atomicSemInit(void)
{
DEFiRet;
dbgprintf("init posix semaphore for atomics emulation\n");
if(sem_init(&atomicSem, 0, 1) == -1)
{
char errStr[1024];
rs_strerror_r(errno, errStr, sizeof(errStr));
dbgprintf("init posix semaphore for atomics emulation failed: %s\n", errStr);
iRet = RS_RET_SYS_ERR; /* the right error code ??? */
}
RETiRet;
}
void
atomicSemExit(void)
{
dbgprintf("destroy posix semaphore for atomics emulation\n");
if(sem_destroy(&atomicSem) == -1)
{
char errStr[1024];
rs_strerror_r(errno, errStr, sizeof(errStr));
dbgprintf("destroy posix semaphore for atomics emulation failed: %s\n", errStr);
}
}
#endif /* HAVE_SEMAPHORE_H */
#endif /* !defined(HAVE_ATOMIC_BUILTINS) */
/* vim:set ai:
*/
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