src/lib/framework/src/driverFramework.cpp学习

1. int Framework::initialize()
2. {
3. DF_LOG_DEBUG("Framework::initialize");
4. g_framework = new SyncObj;                                                    //这个应该是各同步类
5. if (!g_framework) {
6. DF_LOG_ERR("ERROR: falled to allocate g_framework");
7. return -1;
8. }
9. g_run_status = new RunStatus;                                                //这个是状态标识
10. if (!g_run_status) {
11. DF_LOG_ERR("g_run_status allocation failed");
12. return -2;
13. }
14. struct timespec ts = {};
15. int ret = absoluteTime(ts);                                                   //获取绝对时间
16. if (ret != 0) {
17. DF_LOG_ERR("ERROR: absoluteTime returned (%d)", ret);
18. return -4;
19. }
20. ret = HRTWorkQueue::instance().initialize();                                //初始化worker的线程
21. if (ret < 0) {
22. return ret - 10;
23. }
24. DF_LOG_DEBUG("Calling DevMgr::initialize");
25. ret = DevMgr::initialize();                                                    //加了一个标志位true
26. if (ret < 0) {
27. return ret - 20;
28. }
29. DF_LOG_DEBUG("Calling WorkMgr::initialize");
30. ret = WorkMgr::initialize();                                                    //这里也加了一个标志位true
31. if (ret < 0) {
32. return ret - 30;
33. }
34. return 0;
35. }

1. class SyncObj
2. {
3. public:
4. SyncObj();                                                    //构造函数
5. ~SyncObj() = default;
6. void lock();                                                //对Mutex上锁
7. void unlock();                                              //解锁
8. // Returns 0 on success, ETIMEDOUT on timeout                //返回0成功， ETIMEDOUT是超时
9. // Use timeout_us = 0 for blocking wait                    //使用timeout_us =0作为阻塞等待
10. int waitOnSignal(unsigned long timeout_us);
11. void signal();
12. private:
13. pthread_mutex_t m_lock{};                                    //这个大括号是C++11，统一初始化
14. pthread_cond_t    m_new_data_cond{};
15. };