fix: revised TimerTaskManager and add some comments

src/net/src/dispatch_thread.cc

@@ -64,10 +64,10 @@ int DispatchThread::StartThread() {
  }
 
  // Adding timer tasks and run timertaskThread
- timerTaskThread_.AddTimerTask("blrpop_blocking_info_scan", 250, true,
+ timer_task_thread_.AddTimerTask("blrpop_blocking_info_scan", 250, true,
  [this] { this->ScanExpiredBlockedConnsOfBlrpop(); });
- timerTaskThread_.set_thread_name("TimerTaskThread");
- timerTaskThread_.StartThread();
+ timer_task_thread_.set_thread_name("TimerTaskThread");
+ timer_task_thread_.StartThread();
  return ServerThread::StartThread();
 }
 
@@ -88,7 +88,7 @@ int DispatchThread::StopThread() {
  worker_thread_[i]->private_data_ = nullptr;
  }
  }
- timerTaskThread_.StopThread();
+ timer_task_thread_.StopThread();
  return ServerThread::StopThread();
 }
 

src/net/src/dispatch_thread.h

@@ -161,7 +161,7 @@ class DispatchThread : public ServerThread {
  */
  std::shared_mutex block_mtx_;
 
- TimerTaskThread timerTaskThread_;
+ TimerTaskThread timer_task_thread_;
 }; // class DispatchThread
 
 } // namespace net

src/net/src/net_util.h

@@ -47,6 +47,12 @@ struct ExecTsWithId {
  }
 };
 
+/*
+ * For simplicity, current version of TimerTaskThread has no lock inside and all task should be registered before TimerTaskThread started,
+ * but if you have the needs of dynamically add/remove timer task after TimerTaskThread started, you can simply add a mutex to protect
+ * the timer_task_manager_ and also a pipe to wake up the maybe being endless-wait epoll(if all task consumed, epoll will sink into
+ * endless wait) to implement the feature.
+ */
 class TimerTaskManager {
  public:
  TimerTaskManager() = default;