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71 lines
2.0 KiB
C
71 lines
2.0 KiB
C
/* atomic_posix_sem.c: This file supplies an emulation for atomic operations using
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* POSIX semaphores.
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*
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* Copyright 2010 DResearch Digital Media Systems GmbH
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*
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* This file is part of the rsyslog runtime library.
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*
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* The rsyslog runtime library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* The rsyslog runtime library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with the rsyslog runtime library. If not, see <http://www.gnu.org/licenses/>.
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*
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* A copy of the GPL can be found in the file "COPYING" in this distribution.
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* A copy of the LGPL can be found in the file "COPYING.LESSER" in this distribution.
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*/
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#include "config.h"
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#ifndef HAVE_ATOMIC_BUILTINS
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#ifdef HAVE_SEMAPHORE_H
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#include <semaphore.h>
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#include <errno.h>
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#include "atomic.h"
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#include "rsyslog.h"
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#include "srUtils.h"
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sem_t atomicSem;
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rsRetVal
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atomicSemInit(void)
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{
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DEFiRet;
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dbgprintf("init posix semaphore for atomics emulation\n");
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if(sem_init(&atomicSem, 0, 1) == -1)
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{
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char errStr[1024];
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rs_strerror_r(errno, errStr, sizeof(errStr));
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dbgprintf("init posix semaphore for atomics emulation failed: %s\n", errStr);
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iRet = RS_RET_SYS_ERR; /* the right error code ??? */
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}
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RETiRet;
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}
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void
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atomicSemExit(void)
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{
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dbgprintf("destroy posix semaphore for atomics emulation\n");
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if(sem_destroy(&atomicSem) == -1)
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{
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char errStr[1024];
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rs_strerror_r(errno, errStr, sizeof(errStr));
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dbgprintf("destroy posix semaphore for atomics emulation failed: %s\n", errStr);
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}
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}
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#endif /* HAVE_SEMAPHORE_H */
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#endif /* !defined(HAVE_ATOMIC_BUILTINS) */
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/* vim:set ai:
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*/
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