我想在幾件作品同時運行的時候運行下一件作品

Question

我想在幾件作品同時運行的時候運行下一件作品

我不能指望其中的順序工作已經完成。

WorkA, WorkB, WorkC is running at the same time at different threads 

當每個工作完成 的code Manager.SetWorkState(Manager.WorkState)運行

Ex : WorkA is done 
Manager.SetWorkState(Manager.WorkState) Manager.SetWorkState(Manager.WorkState.WorkAIsDone); 

class Manager 
{ 

    public enum WorkState 
    { 
     WorkAIsDone = 0x1, 
     WorkBIsDone = 0x2, 
     WorkCIsDone = 0x4, 
    } 

     WorkState state; 

    public void SetWorkState(WorkState newState) 
    { 
     state = state | newState; 
     if (state == (WorkState.WorkAIsDone | WorkState.WorkBIsDone | WorkState.WorkCIsDone)) 
     { 
      Run_NextWork(); 
     } 
    } 

    public void Run_NextWork() { ... } 
} 

是否有這種情況比較有效的解決方案？

你對這種情況的解決方案是什麼？

Answer 1

有一個簡單的解決方案，使用Task Parellel Library。 以下是隻是一些pseudocode，但我希望你能

class Manager 
{ 
    List<Task> _tasks; 

    public Manager() 
    { 

     _tasks = new List<Task>(); 

     //assuming your 3 tasks are already started from somewhere, run fourth task 
     StartNewTask(Run_NextWork); 
    } 

    public void StartNewTask(Action action) 
    { 
     //WaitAll waits for all tasks in array to complete before continuing 
     Task.WaitAll(_tasks.ToArray()); 
     var newTask = Task.Run(action); 
    } 

    public void Run_NextWork() 
    { 
    } 
}