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/*------------------------------------------------------------------------
* Copyright 2007-2009 (c) Jeff Brown <spadix@users.sourceforge.net>
*
* This file is part of the ZBar Bar Code Reader.
*
* The ZBar Bar Code Reader is free software; you can redistribute it
* and/or modify it under the terms of the GNU Lesser Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* The ZBar Bar Code Reader 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 Public License for more details.
*
* You should have received a copy of the GNU Lesser Public License
* along with the ZBar Bar Code Reader; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301 USA
*
* http://sourceforge.net/projects/zbar
*------------------------------------------------------------------------*/
#ifndef _ZBAR_THREAD_H_
#define _ZBAR_THREAD_H_
/* simple platform thread abstraction
*/
#include "config.h"
#include "event.h"
#if defined(_WIN32)
#include <windows.h>
#define HAVE_THREADS
#define ZTHREAD DWORD WINAPI
typedef DWORD(WINAPI zbar_thread_proc_t)(void *);
typedef DWORD zbar_thread_id_t;
#elif defined(HAVE_LIBPTHREAD)
#include <pthread.h>
#include <signal.h>
#define HAVE_THREADS
#define ZTHREAD void *
typedef ZTHREAD(zbar_thread_proc_t)(void *);
typedef pthread_t zbar_thread_id_t;
#else
#undef HAVE_THREADS
#undef ZTHREAD
typedef void zbar_thread_proc_t;
typedef int zbar_thread_id_t;
#endif
typedef struct zbar_thread_s {
zbar_thread_id_t tid;
int started, running;
zbar_event_t notify, activity;
} zbar_thread_t;
#if defined(_WIN32)
static inline void _zbar_thread_init(zbar_thread_t *thr)
{
thr->running = 1;
_zbar_event_trigger(&thr->activity);
}
static inline zbar_thread_id_t _zbar_thread_self()
{
return (GetCurrentThreadId());
}
static inline int _zbar_thread_is_self(zbar_thread_id_t tid)
{
return (tid == GetCurrentThreadId());
}
#elif defined(HAVE_LIBPTHREAD)
static inline void _zbar_thread_init(zbar_thread_t *thr)
{
sigset_t sigs;
sigfillset(&sigs);
pthread_sigmask(SIG_BLOCK, &sigs, NULL);
thr->running = 1;
_zbar_event_trigger(&thr->activity);
}
static inline zbar_thread_id_t _zbar_thread_self(void)
{
return (pthread_self());
}
static inline int _zbar_thread_is_self(zbar_thread_id_t tid)
{
return (pthread_equal(tid, pthread_self()));
}
#else
#define _zbar_thread_start(...) -1
#define _zbar_thread_stop(...) 0
#define _zbar_thread_self(...) 0
#define _zbar_thread_is_self(...) 1
#endif
#ifdef HAVE_THREADS
extern int _zbar_thread_start(zbar_thread_t *, zbar_thread_proc_t *, void *,
zbar_mutex_t *);
extern int _zbar_thread_stop(zbar_thread_t *, zbar_mutex_t *);
#endif
#endif
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