PostMessage from WorkerThread to Main Window in MFC(从 WorkerThread 到 MFC 中的主窗口的 PostMessage)
问题描述
我有一个 MFC 应用程序,它有一个工作线程,我想做的是从工作线程向主 GUI 线程发布消息,以更新 GUI 上的一些状态消息.到目前为止我所做的是Registered a new window message
I have a MFC application, which has a worker thread, what I want to do is to post message from worker thread to the Main GUI thread to update some status messages on GUI. What I have done so far is Registered a new window message
将此消息添加到对话框类的消息映射中
Added this message to the message map of dialog class
OnStatusUpdate
的原型是
定义是
而工作线程调用代码是
而工作线程代码是
问题是当调用 PostMessage 函数时应该调用 OnStatusUpdate
,但它没有被调用,没有抛出异常或断言,我做错了什么?我试过 ON_REGISTERED_MESSAGE
和 ON_MESSAGE
但没有成功,有什么帮助吗?
the problem is when the PostMessage function is called the OnStatusUpdate
should be called, but it is not being called, no exception or assertion is thrown, What I am doing wrong? I have tried ON_REGISTERED_MESSAGE
and ON_MESSAGE
but no success, any help?
推荐答案
CMFC_TestApplicationDlg::OnBnClickedMfcbutton1()
可能在线程启动前返回.这会导致您的 ThreadParams
超出范围,因此当您从线程访问它时,您正在访问已释放的内存.您需要以其他方式分配它,例如:
CMFC_TestApplicationDlg::OnBnClickedMfcbutton1()
may return before the thread starts. This causes your ThreadParams
to go out of scope, so when you access it from the thread, you are accessing freed memory. You need to allocate it some other way, such as:
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