128 lines
3.0 KiB
C
128 lines
3.0 KiB
C
/*------------------------------------------------------------------------
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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_THREAD_H_
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#define _ZBAR_THREAD_H_
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/* simple platform thread abstraction
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*/
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#include <zbar_config.h>
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#include "event.h"
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#if defined(_WIN32)
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# include <windows.h>
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# define HAVE_THREADS
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# define ZTHREAD DWORD WINAPI
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typedef ZTHREAD (zbar_thread_proc_t)(void*);
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typedef DWORD zbar_thread_id_t;
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#elif defined(HAVE_LIBPTHREAD)
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# include <pthread.h>
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# include <signal.h>
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# define HAVE_THREADS
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# define ZTHREAD void*
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typedef ZTHREAD (zbar_thread_proc_t)(void*);
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typedef pthread_t zbar_thread_id_t;
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#else
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# undef HAVE_THREADS
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# undef ZTHREAD
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typedef void zbar_thread_proc_t;
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typedef int zbar_thread_id_t;
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#endif
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typedef struct zbar_thread_s {
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zbar_thread_id_t tid;
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int started, running;
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zbar_event_t notify, activity;
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} zbar_thread_t;
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#if defined(_WIN32)
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static inline void _zbar_thread_init (zbar_thread_t *thr)
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{
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thr->running = 1;
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_zbar_event_trigger(&thr->activity);
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}
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static inline zbar_thread_id_t _zbar_thread_self ()
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{
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return(GetCurrentThreadId());
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}
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static inline int _zbar_thread_is_self (zbar_thread_id_t tid)
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{
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return(tid == GetCurrentThreadId());
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}
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#elif defined(HAVE_LIBPTHREAD)
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static inline void _zbar_thread_init (zbar_thread_t *thr)
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{
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sigset_t sigs;
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sigfillset(&sigs);
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pthread_sigmask(SIG_BLOCK, &sigs, NULL);
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thr->running = 1;
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_zbar_event_trigger(&thr->activity);
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}
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static inline zbar_thread_id_t _zbar_thread_self (void)
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{
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return(pthread_self());
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}
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static inline int _zbar_thread_is_self (zbar_thread_id_t tid)
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{
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return(pthread_equal(tid, pthread_self()));
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}
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#else
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# define _zbar_thread_start(...) -1
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# define _zbar_thread_stop(...) 0
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# define _zbar_thread_self(...) 0
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# define _zbar_thread_is_self(...) 1
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#endif
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#ifdef HAVE_THREADS
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extern int _zbar_thread_start(zbar_thread_t*, zbar_thread_proc_t*,
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void*, zbar_mutex_t*);
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extern int _zbar_thread_stop(zbar_thread_t*, zbar_mutex_t*);
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#endif
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#endif
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