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29 
30 #ifndef __QCAMERA_QUEUE_H__
31 #define __QCAMERA_QUEUE_H__
32 
33 // System dependencies
34 #include <pthread.h>
35 
36 // Camera dependencies
37 #include "cam_list.h"
38 
39 namespace qcamera {
40 
41 typedef bool (*match_fn_data)(void *data, void *user_data, void *match_data);
42 typedef void (*release_data_fn)(void* data, void *user_data);
43 typedef bool (*match_fn)(void *data, void *user_data);
44 
45 class QCameraQueue {
46 public:
47     QCameraQueue();
48     QCameraQueue(release_data_fn data_rel_fn, void *user_data);
49     virtual ~QCameraQueue();
50     void init();
51     bool enqueue(void *data);
52     bool enqueueWithPriority(void *data);
53     /* This call will put queue into uninitialized state.
54      * Need to call init() in order to use the queue again */
55     void flush();
56     void flushNodes(match_fn match);
57     void flushNodes(match_fn_data match, void *spec_data);
58     void* dequeue(bool bFromHead = true);
59     void* dequeue(match_fn_data match, void *spec_data);
60     void* peek();
61     bool isEmpty();
getCurrentSize()62     int getCurrentSize() {return m_size;}
63 private:
64     typedef struct {
65         struct cam_list list;
66         void* data;
67     } camera_q_node;
68 
69     camera_q_node m_head; // dummy head
70     int m_size;
71     bool m_active;
72     pthread_mutex_t m_lock;
73     release_data_fn m_dataFn;
74     void * m_userData;
75 };
76 
77 }; // namespace qcamera
78 
79 #endif /* __QCAMERA_QUEUE_H__ */
80