一个用PostThreadMessage线程通信例子

#include <stdio.h> #include <windows.h> #include <iostream.h> #include <process.h> #define UM_MSG1 WM_USER+1 #define UM_MSG2 WM_USER+2 DWORD WINAPI Thread1(LPVOID para) { DWORD dwThreadId = *(DWORD *)para; DWORD i=0; TCHAR *p; char strTmp[100]; while(TRUE) { Sleep(1700); p=new TCHAR[10]; sprintf(strTmp,"Hello %d %x",i++,p); PostThreadMessage(dwThreadId,UM_MSG1,(WPARAM)strTmp,(LPARAM)p); //delete []p; } return 0; } DWORD WINAPI Thread2(LPVOID para) { char strTmp[100]; DWORD dwThreadId = *(DWORD *)para; DWORD i=0; TCHAR *p; while(TRUE) { Sleep(3000); p=new TCHAR[10]; sprintf(strTmp,"World %d %x",i++,p); PostThreadMessage(dwThreadId,UM_MSG2,(WPARAM)strTmp,(LPARAM)p); //delete []p; } return 0; } int main() { DWORD dwValue =GetCurrentThreadId(); cout<<"GetCurrentThreadId "<<dwValue<<endl;; HANDLE hThread1 = CreateThread(NULL,0,&Thread1,&dwValue,0,NULL); HANDLE hThread2 = CreateThread(NULL,0,&Thread2,&dwValue,0,NULL); CloseHandle(hThread1); CloseHandle(hThread2); MSG msg; while(GetMessage(&msg,NULL,0,0)) { switch(msg.message) { case UM_MSG1: case UM_MSG2: printf("msg:0x%x /t%x /t%s0/n",msg.message,msg.lParam,msg.wParam); //注释掉这句你就会看到堆内存地址变化 delete [](TCHAR *)msg.lParam; break; default: printf("Unknown msg:0x%x/n",msg.message); break; } Sleep(1); } return 0; }