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 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 void* peek(); 57 bool isEmpty(); getCurrentSize()58 int getCurrentSize() {return m_size;} 59 private: 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