1 /* Copyright (c) 2012-2016, The Linux Foundation. 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 // System dependencies
31 #include <string.h>
32 #include <utils/Errors.h>
33 #define PRCTL_H <SYSTEM_HEADER_PREFIX/prctl.h>
34 #include PRCTL_H
35
36 // Camera dependencies
37 #include "QCameraCmdThread.h"
38
39 extern "C" {
40 #include "mm_camera_dbg.h"
41 }
42
43 using namespace android;
44
45 namespace qcamera {
46
47 /*===========================================================================
48 * FUNCTION : QCameraCmdThread
49 *
50 * DESCRIPTION: default constructor of QCameraCmdThread
51 *
52 * PARAMETERS : None
53 *
54 * RETURN : None
55 *==========================================================================*/
QCameraCmdThread()56 QCameraCmdThread::QCameraCmdThread() :
57 cmd_queue()
58 {
59 cmd_pid = 0;
60 cam_sem_init(&sync_sem, 0);
61 cam_sem_init(&cmd_sem, 0);
62 }
63
64 /*===========================================================================
65 * FUNCTION : ~QCameraCmdThread
66 *
67 * DESCRIPTION: deconstructor of QCameraCmdThread
68 *
69 * PARAMETERS : None
70 *
71 * RETURN : None
72 *==========================================================================*/
~QCameraCmdThread()73 QCameraCmdThread::~QCameraCmdThread()
74 {
75 exit();
76 cam_sem_destroy(&sync_sem);
77 cam_sem_destroy(&cmd_sem);
78 }
79
80 /*===========================================================================
81 * FUNCTION : launch
82 *
83 * DESCRIPTION: launch Cmd Thread
84 *
85 * PARAMETERS :
86 * @start_routine : thread routine function ptr
87 * @user_data : user data ptr
88 *
89 * RETURN : int32_t type of status
90 * NO_ERROR -- success
91 * none-zero failure code
92 *==========================================================================*/
launch(void * (* start_routine)(void *),void * user_data)93 int32_t QCameraCmdThread::launch(void *(*start_routine)(void *),
94 void* user_data)
95 {
96 /* launch the thread */
97 pthread_create(&cmd_pid,
98 NULL,
99 start_routine,
100 user_data);
101 return NO_ERROR;
102 }
103
104 /*===========================================================================
105 * FUNCTION : setName
106 *
107 * DESCRIPTION: name the cmd thread
108 *
109 * PARAMETERS :
110 * @name : desired name for the thread
111 *
112 * RETURN : int32_t type of status
113 * NO_ERROR -- success
114 * none-zero failure code
115 *==========================================================================*/
setName(const char * name)116 int32_t QCameraCmdThread::setName(const char* name)
117 {
118 /* name the thread */
119 prctl(PR_SET_NAME, (unsigned long)name, 0, 0, 0);
120 return NO_ERROR;
121 }
122
123 /*===========================================================================
124 * FUNCTION : sendCmd
125 *
126 * DESCRIPTION: send a command to the Cmd Thread
127 *
128 * PARAMETERS :
129 * @cmd : command to be executed.
130 * @sync_cmd: flag to indicate if this is a synchorinzed cmd. If true, this call
131 * will wait until signal is set after the command is completed.
132 * @priority: flag to indicate if this is a cmd with priority. If true, the cmd
133 * will be enqueued to the head with priority.
134 *
135 * RETURN : int32_t type of status
136 * NO_ERROR -- success
137 * none-zero failure code
138 *==========================================================================*/
sendCmd(camera_cmd_type_t cmd,uint8_t sync_cmd,uint8_t priority)139 int32_t QCameraCmdThread::sendCmd(camera_cmd_type_t cmd, uint8_t sync_cmd, uint8_t priority)
140 {
141 camera_cmd_t *node = (camera_cmd_t *)malloc(sizeof(camera_cmd_t));
142 if (NULL == node) {
143 LOGE("No memory for camera_cmd_t");
144 return NO_MEMORY;
145 }
146 memset(node, 0, sizeof(camera_cmd_t));
147 node->cmd = cmd;
148
149 if (priority) {
150 if (!cmd_queue.enqueueWithPriority((void *)node)) {
151 free(node);
152 node = NULL;
153 }
154 } else {
155 if (!cmd_queue.enqueue((void *)node)) {
156 free(node);
157 node = NULL;
158 }
159 }
160 cam_sem_post(&cmd_sem);
161
162 /* if is a sync call, need to wait until it returns */
163 if (sync_cmd) {
164 cam_sem_wait(&sync_sem);
165 }
166 return NO_ERROR;
167 }
168
169 /*===========================================================================
170 * FUNCTION : getCmd
171 *
172 * DESCRIPTION: dequeue a cmommand from cmd queue
173 *
174 * PARAMETERS : None
175 *
176 * RETURN : cmd dequeued
177 *==========================================================================*/
getCmd()178 camera_cmd_type_t QCameraCmdThread::getCmd()
179 {
180 camera_cmd_type_t cmd = CAMERA_CMD_TYPE_NONE;
181 camera_cmd_t *node = (camera_cmd_t *)cmd_queue.dequeue();
182 if (NULL == node) {
183 LOGD("No notify avail");
184 return CAMERA_CMD_TYPE_NONE;
185 } else {
186 cmd = node->cmd;
187 free(node);
188 }
189 return cmd;
190 }
191
192 /*===========================================================================
193 * FUNCTION : exit
194 *
195 * DESCRIPTION: exit the CMD thread
196 *
197 * PARAMETERS : None
198 *
199 * RETURN : int32_t type of status
200 * NO_ERROR -- success
201 * none-zero failure code
202 *==========================================================================*/
exit()203 int32_t QCameraCmdThread::exit()
204 {
205 int32_t rc = NO_ERROR;
206
207 if (cmd_pid == 0) {
208 return rc;
209 }
210
211 rc = sendCmd(CAMERA_CMD_TYPE_EXIT, 0, 1);
212 if (NO_ERROR != rc) {
213 LOGE("Error during exit, rc = %d", rc);
214 return rc;
215 }
216
217 /* wait until cmd thread exits */
218 if (pthread_join(cmd_pid, NULL) != 0) {
219 LOGD("pthread dead already\n");
220 }
221 cmd_pid = 0;
222 return rc;
223 }
224
225 }; // namespace qcamera
226