1 /* Copyright (c) 2012, The Linux Foundataion. All rights reserved.
2  *
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14  *       from this software without specific prior written permission.
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29 
30 #ifndef __QCAMERA_QUEUE_H__
31 #define __QCAMERA_QUEUE_H__
32 
33 #include <pthread.h>
34 #include "cam_list.h"
35 
36 namespace qcamera {
37 
38 typedef bool (*match_fn_data)(void *data, void *user_data, void *match_data);
39 typedef void (*release_data_fn)(void* data, void *user_data);
40 typedef bool (*match_fn)(void *data, void *user_data);
41 
42 class QCameraQueue {
43 public:
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     bool isEmpty();
57 private:
58     typedef struct {
59         struct cam_list list;
60         void* data;
61     } camera_q_node;
62 
63     camera_q_node m_head; // dummy head
64     int m_size;
65     bool m_active;
66     pthread_mutex_t m_lock;
67     release_data_fn m_dataFn;
68     void * m_userData;
69 };
70 
71 }; // namespace qcamera
72 
73 #endif /* __QCAMERA_QUEUE_H__ */
74