97 lines
2.4 KiB
C
97 lines
2.4 KiB
C
/*------------------------------------------------------------------------
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* Copyright 2007-2010 (c) Jeff Brown <spadix@users.sourceforge.net>
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*
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* This file is part of the ZBar Bar Code Reader.
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*
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* The ZBar Bar Code Reader is free software; you can redistribute it
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* and/or modify it under the terms of the GNU Lesser Public License as
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* published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* The ZBar Bar Code Reader is distributed in the hope that it will be
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser Public License for more details.
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*
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* You should have received a copy of the GNU Lesser Public License
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* along with the ZBar Bar Code Reader; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301 USA
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*
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* http://sourceforge.net/projects/zbar
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*------------------------------------------------------------------------*/
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#ifndef _REFCNT_H_
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#define _REFCNT_H_
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#include <zbar_config.h>
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#include <assert.h>
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#if defined(_WIN32)
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# include <windows.h>
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typedef LONG refcnt_t;
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static inline int _zbar_refcnt (refcnt_t *cnt,
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int delta)
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{
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int rc = -1;
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if(delta > 0)
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while(delta--)
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rc = InterlockedIncrement(cnt);
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else if(delta < 0)
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while(delta++)
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rc = InterlockedDecrement(cnt);
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assert(rc >= 0);
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return(rc);
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}
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#elif defined(TARGET_OS_MAC)
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# include <libkern/OSAtomic.h>
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typedef int32_t refcnt_t;
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static inline int _zbar_refcnt (refcnt_t *cnt,
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int delta)
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{
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int rc = OSAtomicAdd32Barrier(delta, cnt);
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assert(rc >= 0);
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return(rc);
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}
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#elif defined(HAVE_LIBPTHREAD)
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# include <pthread.h>
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typedef int refcnt_t;
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extern pthread_mutex_t _zbar_reflock;
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static inline int _zbar_refcnt (refcnt_t *cnt,
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int delta)
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{
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pthread_mutex_lock(&_zbar_reflock);
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int rc = (*cnt += delta);
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pthread_mutex_unlock(&_zbar_reflock);
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assert(rc >= 0);
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return(rc);
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}
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#else
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typedef int refcnt_t;
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static inline int _zbar_refcnt (refcnt_t *cnt,
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int delta)
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{
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int rc = (*cnt += delta);
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assert(rc >= 0);
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return(rc);
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}
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#endif
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void _zbar_refcnt_init(void);
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#endif
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