1 /* Copyright (c) 2012-2016, The Linux Foundation. All rights reserved.
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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