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