线程间通信 1全局变量2当前主对话框指针3发消息方式4 AfxBeginThread的返回值(为CWinThread类型的指针)5AfxGetApp

Posted 2020-06-26 hungryvampire

①、最常用的方式：全局变量或者多个线程都能看到的一个东东

1、全局变量方式；

int g_Num = 100;

UINT __cdecl ThreadWriteProc(LPVOID lpParameter)

{

while(TRUE) {

++g_Num;

Sleep(50);

}

return 100;

}

UINT __cdecl ThreadReadProc(LPVOID lpParameter)

{

CString strTipMsg;

while(TRUE) {

strTipMsg.Format(_T("%d"), g_Num);

OutputDebugString(strTipMsg);

Sleep(50);

}

return 100;

}

void CThreadTestDlg::OnBnClickedBtn()

{

CWinThread *pThread = AfxBeginThread(ThreadWriteProc, NULL);

AfxBeginThread(ThreadReadProc, NULL);

}

2、大家都能访问到的一个东东；

3、全局变量的声明方式；

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②、发消息方式：PostThreadMessage

#define MY_THREAD_MSG (WM_USER+100)

UINT __cdecl ThreadWriteProc(LPVOID lpParameter)

{

int nCount = 0;

DWORD dwThreadReadID = (DWORD)lpParameter;

while(TRUE) {

PostThreadMessage(dwThreadReadID, MY_THREAD_MSG, nCount++, NULL);

Sleep(50);

}

return 0;

}

UINT __cdecl ThreadPrintProc(LPVOID lpParameter)

{

MSG msg = {0};

while(GetMessage(&msg, 0, 0, 0))

{

switch(msg.message) {

case MY_THREAD_MSG:

{

int nCount = (int)msg.wParam;

CString strText;

strText.Format(_T("%d"), nCount);

OutputDebugString(strText);

}

break;

}

}

return 0;

}

void CThreadTestDlg::OnBnClickedBtn()

{

CWinThread *pThreadPrint = AfxBeginThread(ThreadPrintProc, NULL);

CWinThread *pThreadWrite = AfxBeginThread(ThreadWriteProc, (LPVOID)pThreadPrint->m_nThreadID);//

CWinThread::m_nThreadID

当前线程的ID。

}

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来自为知笔记(Wiz)