felipec gst-openmax: gst-openmax/util/

CVS Root:       /cvs/gstreamer
Module:         gst-openmax
Changes by:     felipec
Date:           Thu Nov 20 2008  17:00:10 UTC

Log message:
Add new semaphore utility.

Modified files:
    util            : Makefile.am
Added files:
    util            : sem.c sem.h

Links:
http://freedesktop.org/cgi-bin/viewcvs.cgi/gstreamer/gst-openmax/util/Makefile.am.diff?r1=1.1&r2=1.2
http://freedesktop.org/cgi-bin/viewcvs.cgi/gstreamer/gst-openmax/util/sem.c?rev=1.1&content-type=text/vnd.viewcvs-markup
http://freedesktop.org/cgi-bin/viewcvs.cgi/gstreamer/gst-openmax/util/sem.h?rev=1.1&content-type=text/vnd.viewcvs-markup

====Begin Diffs====
Index: Makefile.am
===================================================================
RCS file: /cvs/gstreamer/gst-openmax/util/Makefile.am,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -d -r1.1 -r1.2
--- Makefile.am	5 Jun 2008 16:03:02 -0000	1.1
+++ Makefile.am	20 Nov 2008 16:59:56 -0000	1.2
@@ -1,6 +1,7 @@
 noinst_LTLIBRARIES = libutil.la
 
-libutil_la_SOURCES = async_queue.c async_queue.h
+libutil_la_SOURCES = async_queue.c async_queue.h \
+		     sem.c sem.h
 libutil_la_CFLAGS = $(GTHREAD_CFLAGS)
 libutil_la_LIBADD = $(GTHREAD_LIBS)
--- NEW FILE: sem.c ---
/*
 * Copyright (C) 2008 Nokia Corporation.
 *
 * Author: Felipe Contreras <[email protected]>
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation
 * version 2.1 of the License.
 * 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
 */

#include <glib.h>
#include "sem.h"
GSem *
g_sem_new (void)
{
    GSem *sem;
    sem = g_new (GSem, 1);
    sem->condition = g_cond_new ();
    sem->mutex = g_mutex_new ();
    sem->counter = 0;
    return sem;
}
void
g_sem_free (GSem *sem)
    g_cond_free (sem->condition);
    g_mutex_free (sem->mutex);
    g_free (sem);
g_sem_down (GSem *sem)
    g_mutex_lock (sem->mutex);
    while (sem->counter == 0)
    {
        g_cond_wait (sem->condition, sem->mutex);
    }
    sem->counter--;
    g_mutex_unlock (sem->mutex);
g_sem_up (GSem *sem)
    sem->counter++;
    g_cond_signal (sem->condition);
--- NEW FILE: sem.h ---
#ifndef SEM_H
#define SEM_H
typedef struct GSem GSem;
struct GSem
    GCond *condition;
    GMutex *mutex;
    gint counter;
};
GSem *g_omx_sem_new (void);
void g_omx_sem_free (GSem *sem);
void g_omx_sem_down (GSem *sem);
void g_omx_sem_up (GSem *sem);
#endif /* SEM_H */

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