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/*
* Copyright (C) 2008-2009 Nokia Corporation.
*
* Author: Felipe Contreras <felipe.contreras@nokia.com>
*
* 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);
}
void
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);
}
void
g_sem_up (GSem *sem)
{
g_mutex_lock (sem->mutex);
sem->counter++;
g_cond_signal (sem->condition);
g_mutex_unlock (sem->mutex);
}
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