1/* Copyright (c) 2012, The Linux Foundataion. All rights reserved.
2 *
3 * Redistribution and use in source and binary forms, with or without
4 * modification, are permitted provided that the following conditions are
5 * 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
9 *       copyright notice, this list of conditions and the following
10 *       disclaimer in the documentation and/or other materials provided
11 *       with the distribution.
12 *     * Neither the name of The Linux Foundation nor the names of its
13 *       contributors may be used to endorse or promote products derived
14 *       from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
23 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
25 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
26 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 */
29
30#ifndef __QCAMERA_QUEUE_H__
31#define __QCAMERA_QUEUE_H__
32
33#include <pthread.h>
34#include "cam_list.h"
35
36namespace qcamera {
37
38typedef bool (*match_fn_data)(void *data, void *user_data, void *match_data);
39typedef void (*release_data_fn)(void* data, void *user_data);
40typedef bool (*match_fn)(void *data, void *user_data);
41
42class QCameraQueue {
43public:
44    QCameraQueue();
45    QCameraQueue(release_data_fn data_rel_fn, void *user_data);
46    virtual ~QCameraQueue();
47    void init();
48    bool enqueue(void *data);
49    bool enqueueWithPriority(void *data);
50    /* This call will put queue into uninitialized state.
51     * Need to call init() in order to use the queue again */
52    void flush();
53    void flushNodes(match_fn match);
54    void flushNodes(match_fn_data match, void *spec_data);
55    void* dequeue(bool bFromHead = true);
56    void* peek();
57    bool isEmpty();
58    int getCurrentSize() {return m_size;}
59private:
60    typedef struct {
61        struct cam_list list;
62        void* data;
63    } camera_q_node;
64
65    camera_q_node m_head; // dummy head
66    int m_size;
67    bool m_active;
68    pthread_mutex_t m_lock;
69    release_data_fn m_dataFn;
70    void * m_userData;
71};
72
73}; // namespace qcamera
74
75#endif /* __QCAMERA_QUEUE_H__ */
76