| /* Copyright (c) 2012, The Linux Foundataion. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials provided |
| * with the distribution. |
| * * Neither the name of The Linux Foundation nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS |
| * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
| * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN |
| * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| */ |
| |
| #include <utils/Errors.h> |
| #include <utils/Log.h> |
| #include "QCameraQueue.h" |
| |
| namespace qcamera { |
| |
| /*=========================================================================== |
| * FUNCTION : QCameraQueue |
| * |
| * DESCRIPTION: default constructor of QCameraQueue |
| * |
| * PARAMETERS : None |
| * |
| * RETURN : None |
| *==========================================================================*/ |
| QCameraQueue::QCameraQueue() |
| { |
| pthread_mutex_init(&m_lock, NULL); |
| cam_list_init(&m_head.list); |
| m_size = 0; |
| m_dataFn = NULL; |
| m_userData = NULL; |
| } |
| |
| /*=========================================================================== |
| * FUNCTION : QCameraQueue |
| * |
| * DESCRIPTION: constructor of QCameraQueue |
| * |
| * PARAMETERS : |
| * @data_rel_fn : function ptr to release node data internal resource |
| * @user_data : user data ptr |
| * |
| * RETURN : None |
| *==========================================================================*/ |
| QCameraQueue::QCameraQueue(release_data_fn data_rel_fn, void *user_data) |
| { |
| pthread_mutex_init(&m_lock, NULL); |
| cam_list_init(&m_head.list); |
| m_size = 0; |
| m_dataFn = data_rel_fn; |
| m_userData = user_data; |
| } |
| |
| /*=========================================================================== |
| * FUNCTION : ~QCameraQueue |
| * |
| * DESCRIPTION: deconstructor of QCameraQueue |
| * |
| * PARAMETERS : None |
| * |
| * RETURN : None |
| *==========================================================================*/ |
| QCameraQueue::~QCameraQueue() |
| { |
| flush(); |
| pthread_mutex_destroy(&m_lock); |
| } |
| |
| /*=========================================================================== |
| * FUNCTION : isEmpty |
| * |
| * DESCRIPTION: return if the queue is empty or not |
| * |
| * PARAMETERS : None |
| * |
| * RETURN : true -- queue is empty; false -- not empty |
| *==========================================================================*/ |
| bool QCameraQueue::isEmpty() |
| { |
| bool flag = true; |
| pthread_mutex_lock(&m_lock); |
| if (m_size > 0) { |
| flag = false; |
| } |
| pthread_mutex_unlock(&m_lock); |
| return flag; |
| } |
| |
| /*=========================================================================== |
| * FUNCTION : enqueue |
| * |
| * DESCRIPTION: enqueue data into the queue |
| * |
| * PARAMETERS : |
| * @data : data to be enqueued |
| * |
| * RETURN : true -- success; false -- failed |
| *==========================================================================*/ |
| bool QCameraQueue::enqueue(void *data) |
| { |
| camera_q_node *node = |
| (camera_q_node *)malloc(sizeof(camera_q_node)); |
| if (NULL == node) { |
| ALOGE("%s: No memory for camera_q_node", __func__); |
| return false; |
| } |
| |
| memset(node, 0, sizeof(camera_q_node)); |
| node->data = data; |
| |
| pthread_mutex_lock(&m_lock); |
| cam_list_add_tail_node(&node->list, &m_head.list); |
| m_size++; |
| pthread_mutex_unlock(&m_lock); |
| return true; |
| } |
| |
| /*=========================================================================== |
| * FUNCTION : enqueueWithPriority |
| * |
| * DESCRIPTION: enqueue data into queue with priority, will insert into the |
| * head of the queue |
| * |
| * PARAMETERS : |
| * @data : data to be enqueued |
| * |
| * RETURN : true -- success; false -- failed |
| *==========================================================================*/ |
| bool QCameraQueue::enqueueWithPriority(void *data) |
| { |
| camera_q_node *node = |
| (camera_q_node *)malloc(sizeof(camera_q_node)); |
| if (NULL == node) { |
| ALOGE("%s: No memory for camera_q_node", __func__); |
| return false; |
| } |
| |
| memset(node, 0, sizeof(camera_q_node)); |
| node->data = data; |
| |
| pthread_mutex_lock(&m_lock); |
| struct cam_list *p_next = m_head.list.next; |
| |
| m_head.list.next = &node->list; |
| p_next->prev = &node->list; |
| node->list.next = p_next; |
| node->list.prev = &m_head.list; |
| |
| m_size++; |
| pthread_mutex_unlock(&m_lock); |
| return true; |
| } |
| |
| /*=========================================================================== |
| * FUNCTION : dequeue |
| * |
| * DESCRIPTION: dequeue data from the queue |
| * |
| * PARAMETERS : |
| * @bFromHead : if true, dequeue from the head |
| * if false, dequeue from the tail |
| * |
| * RETURN : data ptr. NULL if not any data in the queue. |
| *==========================================================================*/ |
| void* QCameraQueue::dequeue(bool bFromHead) |
| { |
| camera_q_node* node = NULL; |
| void* data = NULL; |
| struct cam_list *head = NULL; |
| struct cam_list *pos = NULL; |
| |
| pthread_mutex_lock(&m_lock); |
| head = &m_head.list; |
| if (bFromHead) { |
| pos = head->next; |
| } else { |
| pos = head->prev; |
| } |
| if (pos != head) { |
| node = member_of(pos, camera_q_node, list); |
| cam_list_del_node(&node->list); |
| m_size--; |
| } |
| pthread_mutex_unlock(&m_lock); |
| |
| if (NULL != node) { |
| data = node->data; |
| free(node); |
| } |
| |
| return data; |
| } |
| |
| /*=========================================================================== |
| * FUNCTION : flush |
| * |
| * DESCRIPTION: flush all nodes from the queue, queue will be empty after this |
| * operation. |
| * |
| * PARAMETERS : None |
| * |
| * RETURN : None |
| *==========================================================================*/ |
| void QCameraQueue::flush(){ |
| camera_q_node* node = NULL; |
| struct cam_list *head = NULL; |
| struct cam_list *pos = NULL; |
| |
| pthread_mutex_lock(&m_lock); |
| head = &m_head.list; |
| pos = head->next; |
| |
| while(pos != head) { |
| node = member_of(pos, camera_q_node, list); |
| pos = pos->next; |
| cam_list_del_node(&node->list); |
| m_size--; |
| |
| if (NULL != node->data) { |
| if (m_dataFn) { |
| m_dataFn(node->data, m_userData); |
| } |
| free(node->data); |
| } |
| free(node); |
| |
| } |
| m_size = 0; |
| pthread_mutex_unlock(&m_lock); |
| } |
| |
| /*=========================================================================== |
| * FUNCTION : flushNodes |
| * |
| * DESCRIPTION: flush only specific nodes, depending on |
| * the given matching function. |
| * |
| * PARAMETERS : |
| * @match : matching function |
| * |
| * RETURN : None |
| *==========================================================================*/ |
| void QCameraQueue::flushNodes(match_fn match){ |
| camera_q_node* node = NULL; |
| struct cam_list *head = NULL; |
| struct cam_list *pos = NULL; |
| |
| if ( NULL == match ) { |
| return; |
| } |
| |
| pthread_mutex_lock(&m_lock); |
| head = &m_head.list; |
| pos = head->next; |
| |
| while(pos != head) { |
| node = member_of(pos, camera_q_node, list); |
| pos = pos->next; |
| if ( match(node->data, m_userData) ) { |
| cam_list_del_node(&node->list); |
| m_size--; |
| |
| if (NULL != node->data) { |
| if (m_dataFn) { |
| m_dataFn(node->data, m_userData); |
| } |
| free(node->data); |
| } |
| free(node); |
| } |
| } |
| pthread_mutex_unlock(&m_lock); |
| } |
| |
| }; // namespace qcamera |