1 /* 2 Copyright (c) 2012, The Linux Foundation. All rights reserved. 3 4 Redistribution and use in source and binary forms, with or without 5 modification, are permitted provided that the following conditions are 6 met: 7 * Redistributions of source code must retain the above copyright 8 notice, this list of conditions and the following disclaimer. 9 * Redistributions in binary form must reproduce the above 10 copyright notice, this list of conditions and the following 11 disclaimer in the documentation and/or other materials provided 12 with the distribution. 13 * Neither the name of The Linux Foundation nor the names of its 14 contributors may be used to endorse or promote products derived 15 from this software without specific prior written permission. 16 17 THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED 18 WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 19 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT 20 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS 21 BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 24 BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 25 WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 26 OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN 27 IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include <pthread.h> 31 #include <errno.h> 32 #include <sys/ioctl.h> 33 #include <sys/types.h> 34 #include <sys/stat.h> 35 #include <fcntl.h> 36 #include <camera.h> 37 #include <semaphore.h> 38 39 #include "mm_camera_dbg.h" 40 #include "mm_camera_interface.h" 41 #include "mm_camera.h" 42 43 #if 0 44 #undef CDBG 45 #undef LOG_TAG 46 #define CDBG ALOGE 47 #define LOG_TAG "NotifyLogs" 48 #endif 49 50 int32_t mm_camera_queue_init(mm_camera_queue_t* queue) 51 { 52 pthread_mutex_init(&queue->lock, NULL); 53 cam_list_init(&queue->head.list); 54 queue->size = 0; 55 return 0; 56 } 57 58 int32_t mm_camera_queue_enq(mm_camera_queue_t* queue, void* data) 59 { 60 mm_camera_q_node_t* node = 61 (mm_camera_q_node_t *)malloc(sizeof(mm_camera_q_node_t)); 62 if (NULL == node) { 63 CDBG_ERROR("%s: No memory for mm_camera_q_node_t", __func__); 64 return -1; 65 } 66 67 memset(node, 0, sizeof(mm_camera_q_node_t)); 68 node->data = data; 69 70 pthread_mutex_lock(&queue->lock); 71 cam_list_add_tail_node(&node->list, &queue->head.list); 72 queue->size++; 73 pthread_mutex_unlock(&queue->lock); 74 75 return 0; 76 77 } 78 79 void* mm_camera_queue_deq(mm_camera_queue_t* queue) 80 { 81 mm_camera_q_node_t* node = NULL; 82 void* data = NULL; 83 struct cam_list *head = NULL; 84 struct cam_list *pos = NULL; 85 86 pthread_mutex_lock(&queue->lock); 87 head = &queue->head.list; 88 pos = head->next; 89 if (pos != head) { 90 node = member_of(pos, mm_camera_q_node_t, list); 91 cam_list_del_node(&node->list); 92 queue->size--; 93 } 94 pthread_mutex_unlock(&queue->lock); 95 96 if (NULL != node) { 97 data = node->data; 98 free(node); 99 } 100 101 return data; 102 } 103 104 int32_t mm_camera_queue_deinit(mm_camera_queue_t* queue) 105 { 106 mm_camera_queue_flush(queue); 107 pthread_mutex_destroy(&queue->lock); 108 return 0; 109 } 110 111 int32_t mm_camera_queue_flush(mm_camera_queue_t* queue) 112 { 113 mm_camera_q_node_t* node = NULL; 114 void* data = NULL; 115 struct cam_list *head = NULL; 116 struct cam_list *pos = NULL; 117 118 pthread_mutex_lock(&queue->lock); 119 head = &queue->head.list; 120 pos = head->next; 121 122 while(pos != head) { 123 node = member_of(pos, mm_camera_q_node_t, list); 124 pos = pos->next; 125 cam_list_del_node(&node->list); 126 queue->size--; 127 128 /* TODO later to consider ptr inside data */ 129 /* for now we only assume there is no ptr inside data 130 * so we free data directly */ 131 if (NULL != node->data) { 132 free(node->data); 133 } 134 free(node); 135 136 } 137 queue->size = 0; 138 pthread_mutex_unlock(&queue->lock); 139 return 0; 140 } 141 142 static void *mm_camera_cmd_thread(void *data) 143 { 144 int rc = 0; 145 int running = 1; 146 int ret; 147 mm_camera_cmd_thread_t *cmd_thread = 148 (mm_camera_cmd_thread_t *)data; 149 mm_camera_cmdcb_t* node = NULL; 150 151 do { 152 do { 153 ret = sem_wait(&cmd_thread->cmd_sem); 154 if (ret != 0 && errno != EINVAL) { 155 CDBG_ERROR("%s: sem_wait error (%s)", 156 __func__, strerror(errno)); 157 return NULL; 158 } 159 } while (ret != 0); 160 161 /* we got notified about new cmd avail in cmd queue */ 162 node = (mm_camera_cmdcb_t*)mm_camera_queue_deq(&cmd_thread->cmd_queue); 163 while (node != NULL) { 164 switch (node->cmd_type) { 165 case MM_CAMERA_CMD_TYPE_EVT_CB: 166 case MM_CAMERA_CMD_TYPE_DATA_CB: 167 case MM_CAMERA_CMD_TYPE_ASYNC_CB: 168 case MM_CAMERA_CMD_TYPE_REQ_DATA_CB: 169 case MM_CAMERA_CMD_TYPE_SUPER_BUF_DATA_CB: 170 if (NULL != cmd_thread->cb) { 171 cmd_thread->cb(node, cmd_thread->user_data); 172 } 173 break; 174 case MM_CAMERA_CMD_TYPE_EXIT: 175 default: 176 running = 0; 177 break; 178 } 179 free(node); 180 node = (mm_camera_cmdcb_t*)mm_camera_queue_deq(&cmd_thread->cmd_queue); 181 } /* (node != NULL) */ 182 } while (running); 183 return NULL; 184 } 185 186 int32_t mm_camera_cmd_thread_launch(mm_camera_cmd_thread_t * cmd_thread, 187 mm_camera_cmd_cb_t cb, 188 void* user_data) 189 { 190 int32_t rc = 0; 191 192 sem_init(&cmd_thread->cmd_sem, 0, 0); 193 mm_camera_queue_init(&cmd_thread->cmd_queue); 194 cmd_thread->cb = cb; 195 cmd_thread->user_data = user_data; 196 197 /* launch the thread */ 198 pthread_create(&cmd_thread->cmd_pid, 199 NULL, 200 mm_camera_cmd_thread, 201 (void *)cmd_thread); 202 return rc; 203 } 204 205 int32_t mm_camera_cmd_thread_stop(mm_camera_cmd_thread_t * cmd_thread) 206 { 207 int32_t rc = 0; 208 mm_camera_buf_info_t buf_info; 209 mm_camera_cmdcb_t* node = (mm_camera_cmdcb_t *)malloc(sizeof(mm_camera_cmdcb_t)); 210 if (NULL == node) { 211 CDBG_ERROR("%s: No memory for mm_camera_cmdcb_t", __func__); 212 return -1; 213 } 214 215 memset(node, 0, sizeof(mm_camera_cmdcb_t)); 216 node->cmd_type = MM_CAMERA_CMD_TYPE_EXIT; 217 218 mm_camera_queue_enq(&cmd_thread->cmd_queue, node); 219 sem_post(&cmd_thread->cmd_sem); 220 221 /* wait until cmd thread exits */ 222 if (pthread_join(cmd_thread->cmd_pid, NULL) != 0) { 223 CDBG("%s: pthread dead already\n", __func__); 224 } 225 return rc; 226 } 227 228 int32_t mm_camera_cmd_thread_destroy(mm_camera_cmd_thread_t * cmd_thread) 229 { 230 int32_t rc = 0; 231 mm_camera_queue_deinit(&cmd_thread->cmd_queue); 232 sem_destroy(&cmd_thread->cmd_sem); 233 memset(cmd_thread, 0, sizeof(mm_camera_cmd_thread_t)); 234 return rc; 235 } 236 237 int32_t mm_camera_cmd_thread_release(mm_camera_cmd_thread_t * cmd_thread) 238 { 239 int32_t rc = 0; 240 rc = mm_camera_cmd_thread_stop(cmd_thread); 241 if (0 == rc) { 242 rc = mm_camera_cmd_thread_destroy(cmd_thread); 243 } 244 return rc; 245 } 246 247
