如何在线程中使用事件 [英] how to use event in threads

问题描述

我不知道如何在线程概念中使用事件..

我指的是msdn帮助..但是程序很难理解..

你能帮我吗如何执行该过程...

i don''t know how to use event in the threading concept..

i refer the msdn help.. but the program is very difficult to understand..

so can u help me. how to do that process...

推荐答案

好像您想了解很多有关内核对象的内容:).好吧，基本上是这样的:

Looks like you want to know a lot about kernel objects :). Well, basically it''s this way:

1. 通常通过调用 CreateEvent 函数
2. 来创建事件，然后将此事件的句柄传递给将使用该事件的所有线程.根据情况，有很多方法可以做到这一点-从在线程函数参数中传递句柄到在另一个进程中复制它
3. 当任何线程需要等待此事件发生时，您调用 WaitForSingleObject 或 WaitForMultipleObjects 函数，将事件句柄作为参数传递
4. 当满足等待条件(例如，您要处理的数据)时，另一个线程通过调用 SetEvent 函数
5. 引发事件，下次等待线程接收处理器时间时， WaitForSingle 对象返回，因此该线程可以继续执行
6. 在需要时，可以通过 ResetEvent 函数重置事件(处于尚未发生"状态)，因此您可以从步骤3开始重复该过程.
7. 需要时，应通过调用 CloseHandle 方法

1. You create an event, usually by calling CreateEvent function
2. You pass handle of this event to all the threads that shall use your event. Depending on situation, there are numerous ways to do that - from passing handle in thread function arguments to duplicating it in another process
3. When any of your threads need to wait for this event to occur, you call WaitForSingleObject or WaitForMultipleObjects function, passing event handle as an argument
4. When condition being wait for is satisfied (you get the data to process, for example), another thread raises event by calling SetEvent function
5. Next time waiting thread receives processor time, WaitForSingle object returns, so this thread can continue execution
6. When needed, event can be reset (put in "not yet occured" state) by ResetEvent function, so you can repeat the process from step 3
7. When no mere needed, Event handles should be closed by calling CloseHandle methods

关闭事件句柄
这是非常简短且不完整的描述，缺少许多细节，但它应该为您提供基础知识.在更深入地研究MSDN之前要先做一些事情:)

This is very brief and incomplete description, missing a lot of details, but it should give you the basics. Something to start with before diving deeper into MSDN :)

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