79 lines
2.7 KiB
C
Executable File
79 lines
2.7 KiB
C
Executable File
/*--------------------------------------------------------------------------
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Copyright (c) 2010-2011, 2013, The Linux Foundation. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of The Linux Foundation nor
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the names of its contributors may be used to endorse or promote
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products derived from this software without specific prior written
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permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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--------------------------------------------------------------------------*/
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#ifndef QUEUE_H
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#define QUEUE_H
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#include<pthread.h>
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#include <semaphore.h>
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#include <stdio.h>
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#include <string.h>
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/* Message Queue structure */
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struct video_msgq {
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/* Command to be executed */
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unsigned int cmd;
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unsigned int status;
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/* Client-specific data */
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void *clientdata;
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};
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/* Thread & Message Queue information */
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struct video_queue_context {
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/* Message Queue related members */
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pthread_mutex_t mutex;
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sem_t sem_message;
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int commandq_size;
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int dataq_size;
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struct video_msgq *ptr_dataq;
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struct video_msgq *ptr_cmdq;
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int write_dataq ;
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int read_dataq;
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int write_comq ;
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int read_comq ;
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};
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int check_if_queue_empty ( unsigned int queuetocheck,void* queuecontext );
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struct video_msgq * queue_get_cmd ( void* queuecontext );
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int queue_post_cmdq ( void *queuecontext,
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struct video_msgq *post_msg
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);
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int queue_post_dataq ( void *queuecontext,
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struct video_msgq *post_msg
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);
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#endif /* QUEUE_H */
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