queue.h revision e4010605f233a213cf0d972397bb33c34c364227 
1/*--------------------------------------------------------------------------
2Copyright (c) 2010-2011, 2013, The Linux Foundation. All rights reserved.
3
4Redistribution and use in source and binary forms, with or without
5modification, are permitted provided that the following conditions are met:
6    * Redistributions of source code must retain the above copyright
7      notice, this list of conditions and the following disclaimer.
8    * Redistributions in binary form must reproduce the above copyright
9      notice, this list of conditions and the following disclaimer in the
10      documentation and/or other materials provided with the distribution.
11    * Neither the name of The Linux Foundation nor
12      the names of its contributors may be used to endorse or promote
13      products derived from this software without specific prior written
14      permission.
15
16THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
19NON-INFRINGEMENT ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
20CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
21EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
25OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
26ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27--------------------------------------------------------------------------*/
28#ifndef QUEUE_H
29#define QUEUE_H
30
31#include<pthread.h>
32#include <semaphore.h>
33#include <stdio.h>
34#include <string.h>
35
36/* Message Queue structure */
37struct video_msgq {
38    /* Command to be executed */
39    unsigned int cmd;
40
41    unsigned int status;
42
43    /* Client-specific data */
44    void *clientdata;
45};
46
47
48/* Thread & Message Queue information */
49struct video_queue_context {
50    /* Message Queue related members */
51    pthread_mutex_t  mutex;
52    sem_t sem_message;
53    int commandq_size;
54    int dataq_size;
55    struct video_msgq *ptr_dataq;
56    struct video_msgq *ptr_cmdq;
57    int write_dataq ;
58    int read_dataq;
59    int write_comq ;
60    int read_comq ;
61
62};
63
64int check_if_queue_empty ( unsigned int queuetocheck,void* queuecontext );
65
66struct video_msgq * queue_get_cmd ( void* queuecontext );
67
68
69
70int queue_post_cmdq ( void *queuecontext,
71        struct video_msgq *post_msg
72        );
73
74int queue_post_dataq ( void *queuecontext,
75        struct video_msgq *post_msg
76        );
77
78#endif /* QUEUE_H */
79