Ryo Hagimoto / zbar_010

ZBar bar code reader . http://zbar.sourceforge.net/ ZBar is licensed under the GNU LGPL 2.1 to enable development of both open source and commercial projects.

Dependents:   GR-PEACH_Camera_in_barcode levkov_ov7670

LICENSE

The ZBar Bar Code Reader is Copyright (C) 2007-2009 Jeff Brown <spadix@users.sourceforge.net> The QR Code reader is Copyright (C) 1999-2009 Timothy B. Terriberry <tterribe@xiph.org>

You can redistribute this library and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.

This library 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 General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

ISAAC is based on the public domain implementation by Robert J. Jenkins Jr., and is itself public domain.

Portions of the bit stream reader are copyright (C) The Xiph.Org Foundation 1994-2008, and are licensed under a BSD-style license.

The Reed-Solomon decoder is derived from an implementation (C) 1991-1995 Henry Minsky (hqm@ua.com, hqm@ai.mit.edu), and is licensed under the LGPL with permission.

zbar/thread.h

Committer:
RyoheiHagimoto
Date:
2016-04-19
Revision:
1:500d42699c34
Parent:
0:56c5742b9e2b

File content as of revision 1:500d42699c34:

/*------------------------------------------------------------------------
 *  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 ZTHREAD (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