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Diffstat (limited to 'Source/DirectFB/lib/voodoo/waitqueue.h')
-rwxr-xr-x | Source/DirectFB/lib/voodoo/waitqueue.h | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/Source/DirectFB/lib/voodoo/waitqueue.h b/Source/DirectFB/lib/voodoo/waitqueue.h new file mode 100755 index 0000000..ab163ce --- /dev/null +++ b/Source/DirectFB/lib/voodoo/waitqueue.h @@ -0,0 +1,117 @@ +/* + (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 + |