pure sdk for main
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/*------------------------------------------------------------------------
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* Copyright 2007-2009 (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 _ZBAR_MUTEX_H_
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#define _ZBAR_MUTEX_H_
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#include <zbar_config.h>
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/* simple platform mutex abstraction
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*/
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#if defined(_WIN32)
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# include <windows.h>
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# define DEBUG_LOCKS
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# ifdef DEBUG_LOCKS
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typedef struct zbar_mutex_s {
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int count;
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CRITICAL_SECTION mutex;
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} zbar_mutex_t;
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static inline int _zbar_mutex_init (zbar_mutex_t *lock)
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{
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lock->count = 1;
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InitializeCriticalSection(&lock->mutex);
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return(0);
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}
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static inline void _zbar_mutex_destroy (zbar_mutex_t *lock)
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{
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DeleteCriticalSection(&lock->mutex);
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}
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static inline int _zbar_mutex_lock (zbar_mutex_t *lock)
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{
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EnterCriticalSection(&lock->mutex);
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if(lock->count++ < 1)
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assert(0);
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return(0);
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}
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static inline int _zbar_mutex_unlock (zbar_mutex_t *lock)
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{
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if(lock->count-- <= 1)
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assert(0);
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LeaveCriticalSection(&lock->mutex);
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return(0);
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}
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# else
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typedef CRITICAL_SECTION zbar_mutex_t;
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static inline int _zbar_mutex_init (zbar_mutex_t *lock)
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{
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InitializeCriticalSection(lock);
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return(0);
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}
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static inline void _zbar_mutex_destroy (zbar_mutex_t *lock)
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{
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DeleteCriticalSection(lock);
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}
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static inline int _zbar_mutex_lock (zbar_mutex_t *lock)
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{
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EnterCriticalSection(lock);
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return(0);
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}
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static inline int _zbar_mutex_unlock (zbar_mutex_t *lock)
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{
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LeaveCriticalSection(lock);
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return(0);
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}
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# endif
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#elif defined(HAVE_LIBPTHREAD)
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# include <pthread.h>
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typedef pthread_mutex_t zbar_mutex_t;
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static inline int _zbar_mutex_init (zbar_mutex_t *lock)
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{
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# ifdef DEBUG_LOCKS
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pthread_mutexattr_t attr;
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pthread_mutexattr_init(&attr);
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pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK);
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int rc = pthread_mutex_init(lock, &attr);
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pthread_mutexattr_destroy(&attr);
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return(rc);
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# else
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return(pthread_mutex_init(lock, NULL));
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# endif
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}
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static inline void _zbar_mutex_destroy (zbar_mutex_t *lock)
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{
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pthread_mutex_destroy(lock);
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}
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static inline int _zbar_mutex_lock (zbar_mutex_t *lock)
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{
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int rc = pthread_mutex_lock(lock);
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# ifdef DEBUG_LOCKS
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assert(!rc);
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# endif
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/* FIXME save system code */
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/*rc = err_capture(proc, SEV_ERROR, ZBAR_ERR_LOCKING, __func__,
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"unable to lock processor");*/
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return(rc);
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}
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static inline int _zbar_mutex_unlock (zbar_mutex_t *lock)
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{
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int rc = pthread_mutex_unlock(lock);
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# ifdef DEBUG_LOCKS
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assert(!rc);
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# endif
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/* FIXME save system code */
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return(rc);
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}
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#else
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typedef int zbar_mutex_t[0];
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#define _zbar_mutex_init(l) -1
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#define _zbar_mutex_destroy(l)
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#define _zbar_mutex_lock(l) 0
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#define _zbar_mutex_unlock(l) 0
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#endif
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#endif
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