1 /* Copyright (c) 2012-2013, 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 <utils/Errors.h>
31 #include <utils/Log.h>
32 #include <malloc.h>
33 #include "QCameraCmdThread.h"
34
35 using namespace android;
36
37 namespace qcamera {
38
39 /*===========================================================================
40 * FUNCTION : QCameraCmdThread
41 *
42 * DESCRIPTION: default constructor of QCameraCmdThread
43 *
44 * PARAMETERS : None
45 *
46 * RETURN : None
47 *==========================================================================*/
QCameraCmdThread()48 QCameraCmdThread::QCameraCmdThread() :
49 cmd_queue()
50 {
51 cmd_pid = 0;
52 cam_sem_init(&sync_sem, 0);
53 cam_sem_init(&cmd_sem, 0);
54 }
55
56 /*===========================================================================
57 * FUNCTION : ~QCameraCmdThread
58 *
59 * DESCRIPTION: deconstructor of QCameraCmdThread
60 *
61 * PARAMETERS : None
62 *
63 * RETURN : None
64 *==========================================================================*/
~QCameraCmdThread()65 QCameraCmdThread::~QCameraCmdThread()
66 {
67 cam_sem_destroy(&sync_sem);
68 cam_sem_destroy(&cmd_sem);
69 }
70
71 /*===========================================================================
72 * FUNCTION : launch
73 *
74 * DESCRIPTION: launch Cmd Thread
75 *
76 * PARAMETERS :
77 * @start_routine : thread routine function ptr
78 * @user_data : user data ptr
79 *
80 * RETURN : int32_t type of status
81 * NO_ERROR -- success
82 * none-zero failure code
83 *==========================================================================*/
launch(void * (* start_routine)(void *),void * user_data)84 int32_t QCameraCmdThread::launch(void *(*start_routine)(void *),
85 void* user_data)
86 {
87 /* launch the thread */
88 pthread_create(&cmd_pid,
89 NULL,
90 start_routine,
91 user_data);
92 return NO_ERROR;
93 }
94
95 /*===========================================================================
96 * FUNCTION : sendCmd
97 *
98 * DESCRIPTION: send a command to the Cmd Thread
99 *
100 * PARAMETERS :
101 * @cmd : command to be executed.
102 * @sync_cmd: flag to indicate if this is a synchorinzed cmd. If true, this call
103 * will wait until signal is set after the command is completed.
104 * @priority: flag to indicate if this is a cmd with priority. If true, the cmd
105 * will be enqueued to the head with priority.
106 *
107 * RETURN : int32_t type of status
108 * NO_ERROR -- success
109 * none-zero failure code
110 *==========================================================================*/
sendCmd(camera_cmd_type_t cmd,uint8_t sync_cmd,uint8_t priority)111 int32_t QCameraCmdThread::sendCmd(camera_cmd_type_t cmd, uint8_t sync_cmd, uint8_t priority)
112 {
113 camera_cmd_t *node = (camera_cmd_t *)malloc(sizeof(camera_cmd_t));
114 if (NULL == node) {
115 ALOGE("%s: No memory for camera_cmd_t", __func__);
116 return NO_MEMORY;
117 }
118 memset(node, 0, sizeof(camera_cmd_t));
119 node->cmd = cmd;
120
121 if (priority) {
122 cmd_queue.enqueueWithPriority((void *)node);
123 } else {
124 cmd_queue.enqueue((void *)node);
125 }
126 cam_sem_post(&cmd_sem);
127
128 /* if is a sync call, need to wait until it returns */
129 if (sync_cmd) {
130 cam_sem_wait(&sync_sem);
131 }
132 return NO_ERROR;
133 }
134
135 /*===========================================================================
136 * FUNCTION : getCmd
137 *
138 * DESCRIPTION: dequeue a cmommand from cmd queue
139 *
140 * PARAMETERS : None
141 *
142 * RETURN : cmd dequeued
143 *==========================================================================*/
getCmd()144 camera_cmd_type_t QCameraCmdThread::getCmd()
145 {
146 camera_cmd_type_t cmd = CAMERA_CMD_TYPE_NONE;
147 camera_cmd_t *node = (camera_cmd_t *)cmd_queue.dequeue();
148 if (NULL == node) {
149 ALOGD("%s: No notify avail", __func__);
150 return CAMERA_CMD_TYPE_NONE;
151 } else {
152 cmd = node->cmd;
153 free(node);
154 }
155 return cmd;
156 }
157
158 /*===========================================================================
159 * FUNCTION : exit
160 *
161 * DESCRIPTION: exit the CMD thread
162 *
163 * PARAMETERS : None
164 *
165 * RETURN : int32_t type of status
166 * NO_ERROR -- success
167 * none-zero failure code
168 *==========================================================================*/
exit()169 int32_t QCameraCmdThread::exit()
170 {
171 int32_t rc = NO_ERROR;
172
173 if (cmd_pid == 0) {
174 return rc;
175 }
176
177 rc = sendCmd(CAMERA_CMD_TYPE_EXIT, 0, 1);
178 if (NO_ERROR != rc) {
179 ALOGE("%s: Error during exit, rc = %d", __func__, rc);
180 return rc;
181 }
182
183 /* wait until cmd thread exits */
184 if (pthread_join(cmd_pid, NULL) != 0) {
185 ALOGD("%s: pthread dead already\n", __func__);
186 }
187 cmd_pid = 0;
188 return rc;
189 }
190
191 }; // namespace qcamera
192