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 #include "mm_qcamera_dbg.h"
31 #include "mm_qcamera_app.h"
32
mm_camera_queue_init(mm_camera_queue_t * queue,release_data_fn data_rel_fn,void * user_data)33 int mm_camera_queue_init(mm_camera_queue_t *queue,
34 release_data_fn data_rel_fn,
35 void *user_data)
36 {
37 if ( NULL == queue ) {
38 return -1;
39 }
40
41 pthread_mutex_init(&queue->m_lock, NULL);
42 cam_list_init(&queue->m_head.list);
43 queue->m_size = 0;
44 queue->m_dataFn = data_rel_fn;
45 queue->m_userData = user_data;
46
47 return MM_CAMERA_OK;
48 }
49
mm_qcamera_queue_release(mm_camera_queue_t * queue)50 int mm_qcamera_queue_release(mm_camera_queue_t *queue)
51 {
52 if ( NULL == queue ) {
53 return -1;
54 }
55
56 mm_qcamera_queue_flush(queue);
57 pthread_mutex_destroy(&queue->m_lock);
58
59 return MM_CAMERA_OK;
60 }
61
mm_qcamera_queue_isempty(mm_camera_queue_t * queue)62 int mm_qcamera_queue_isempty(mm_camera_queue_t *queue)
63 {
64 if ( NULL == queue ) {
65 return 0;
66 }
67
68 int flag = 1;
69 pthread_mutex_lock(&queue->m_lock);
70 if (queue->m_size > 0) {
71 flag = 0;
72 }
73 pthread_mutex_unlock(&queue->m_lock);
74
75 return flag;
76 }
77
mm_qcamera_queue_enqueue(mm_camera_queue_t * queue,void * data)78 int mm_qcamera_queue_enqueue(mm_camera_queue_t *queue, void *data)
79 {
80 if ( NULL == queue ) {
81 return -1;
82 }
83
84 camera_q_node *node =
85 (camera_q_node *)malloc(sizeof(camera_q_node));
86 if (NULL == node) {
87 CDBG_ERROR("%s: No memory for camera_q_node", __func__);
88 return 0;
89 }
90
91 memset(node, 0, sizeof(camera_q_node));
92 node->data = data;
93
94 pthread_mutex_lock(&queue->m_lock);
95 cam_list_add_tail_node(&node->list, &queue->m_head.list);
96 queue->m_size++;
97 pthread_mutex_unlock(&queue->m_lock);
98
99 return 1;
100 }
101
mm_qcamera_queue_dequeue(mm_camera_queue_t * queue,int bFromHead)102 void* mm_qcamera_queue_dequeue(mm_camera_queue_t *queue, int bFromHead)
103 {
104 if ( NULL == queue ) {
105 return NULL;
106 }
107
108 camera_q_node* node = NULL;
109 void* data = NULL;
110 struct cam_list *head = NULL;
111 struct cam_list *pos = NULL;
112
113 pthread_mutex_lock(&queue->m_lock);
114 head = &queue->m_head.list;
115 if (bFromHead) {
116 pos = head->next;
117 } else {
118 pos = head->prev;
119 }
120 if (pos != head) {
121 node = member_of(pos, camera_q_node, list);
122 cam_list_del_node(&node->list);
123 queue->m_size--;
124 }
125 pthread_mutex_unlock(&queue->m_lock);
126
127 if (NULL != node) {
128 data = node->data;
129 free(node);
130 }
131
132 return data;
133 }
134
mm_qcamera_queue_flush(mm_camera_queue_t * queue)135 void mm_qcamera_queue_flush(mm_camera_queue_t *queue)
136 {
137 camera_q_node* node = NULL;
138 struct cam_list *head = NULL;
139 struct cam_list *pos = NULL;
140
141 if ( NULL == queue ) {
142 return;
143 }
144
145 pthread_mutex_lock(&queue->m_lock);
146 head = &queue->m_head.list;
147 pos = head->next;
148
149 while(pos != head) {
150 node = member_of(pos, camera_q_node, list);
151 pos = pos->next;
152 cam_list_del_node(&node->list);
153 queue->m_size--;
154
155 if (NULL != node->data) {
156 if (queue->m_dataFn) {
157 queue->m_dataFn(node->data, queue->m_userData);
158 }
159 free(node->data);
160 }
161 free(node);
162
163 }
164 queue->m_size = 0;
165 pthread_mutex_unlock(&queue->m_lock);
166 }
167
168