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/*
(c) Copyright 2001-2008 The world wide DirectFB Open Source Community (directfb.org)
(c) Copyright 2000-2004 Convergence (integrated media) GmbH
All rights reserved.
Written by Denis Oliver Kropp <dok@directfb.org>,
Andreas Hundt <andi@fischlustig.de>,
Sven Neumann <neo@directfb.org>,
Ville Syrjälä <syrjala@sci.fi> and
Claudio Ciccani <klan@users.sf.net>.
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; either
version 2 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., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#ifndef __DIRECT__OS__LINUX__GLIBC__WAITQUEUE_H__
#define __DIRECT__OS__LINUX__GLIBC__WAITQUEUE_H__
#include <pthread.h>
#include <direct/util.h>
#include "mutex.h"
/**********************************************************************************************************************/
typedef struct {
pthread_cond_t cond;
} DirectWaitQueue;
/**********************************************************************************************************************/
#define DIRECT_WAITQUEUE_INITIALIZER(name) { PTHREAD_COND_INITIALIZER }
/**********************************************************************************************************************/
static inline DirectResult
direct_waitqueue_init( DirectWaitQueue *queue )
{
if (pthread_cond_init( &queue->cond, NULL ))
return errno2result( errno );
return DR_OK;
}
static inline DirectResult
direct_waitqueue_wait( DirectWaitQueue *queue, DirectMutex *mutex )
{
if (pthread_cond_wait( &queue->cond, &mutex->lock ))
return errno2result( errno );
return DR_OK;
}
static inline DirectResult
direct_waitqueue_wait_timeout( DirectWaitQueue *queue, DirectMutex *mutex, unsigned long micros )
{
struct timeval now;
struct timespec timeout;
long int nano_seconds = micros * 1000;
gettimeofday( &now, NULL );
timeout.tv_sec = now.tv_sec;
timeout.tv_nsec = (now.tv_usec * 1000) + nano_seconds;
timeout.tv_sec += timeout.tv_nsec / 1000000000;
timeout.tv_nsec %= 1000000000;
if (pthread_cond_timedwait( &queue->cond, &mutex->lock, &timeout ) == ETIMEDOUT)
return DR_TIMEOUT;
return DR_OK;
}
static inline DirectResult
direct_waitqueue_signal( DirectWaitQueue *queue )
{
if (pthread_cond_signal( &queue->cond ))
return errno2result( errno );
return DR_OK;
}
static inline DirectResult
direct_waitqueue_broadcast( DirectWaitQueue *queue )
{
if (pthread_cond_broadcast( &queue->cond ))
return errno2result( errno );
return DR_OK;
}
static inline DirectResult
direct_waitqueue_deinit( DirectWaitQueue *queue )
{
if (pthread_cond_destroy( &queue->cond ))
return errno2result( errno );
return DR_OK;
}
#endif
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