CreateThread创建一个简单的多线程

 

#include<windows.h>
#include<iostream.h>
DWORD WINAPI ThreadFunc(LPVOID param) //线程有个参数的，要加上
{
  MessageBox(NULL,"this is a test","Test",MB_OK);
  return 0;
}
int main()
{
  HANDLE hThread=NULL;
  DWORD ThreadNum=0;
  hThread=CreateThread(NULL,NULL,(LPTHREAD_START_ROUTINE)ThreadFunc,0,NULL,&ThreadNum);  //ThreadFunc前加个强行转换不会错
  WaitForSingleObject(hThread, INFINITE); //这句不加上有可能线程还没起来就结束了
  return 0; 
}

 

 

创建一个Win32 Console Application，工程名为CreateMythread

添加一个CPP文件，代码如下

#include <iostream>

#include <windows.h>

using namespace std;

DWORD WINAPI ThreadProc(LPVOID pParam);

UINT PrintHello(LPVOID lpParam);

HANDLE g_Mutex;  //互斥量

int main(int argc,char* argv[])

{

    //创建互斥量

    g_Mutex=CreateMutex(NULL,false,"CreateMythread");

    DWORD ThreadID;

    char* cParam="Hello World!";

    int iParam=2010;

    //创建第一个线程ThreadProc

    CreateThread(NULL,0,ThreadProc,

        cParam,0,&ThreadID);

    //创建第二个线程PrintHello

    //若不是规范格式则必须用LPTHREAD_START_ROUTINE转换

    CreateThread(NULL,0,(LPTHREAD_START_ROUTINE)PrintHello,

        &iParam,0,&ThreadID);

    Sleep(100);

    CloseHandle(g_Mutex);

    //system("pause");

    return 0;

}

DWORD WINAPI ThreadProc(LPVOID pParam)

{

    //等待被唤醒

    WaitForSingleObject(g_Mutex,INFINITE);

    cout <<"CreateThread:ThreadProc ";

    cout <<(char*)pParam <<endl;

    //Sleep(0);

    //将互斥量设置为有信号,此时第一个等待的线程被唤醒，并将该互斥量置为无信号状态

    ReleaseMutex(g_Mutex);

    return 0;

}

UINT PrintHello(LPVOID lpParam)

{

    WaitForSingleObject(g_Mutex,INFINITE);

    cout <<"CreateThread:PrintHello ";

    cout <<*((int*)lpParam) <<endl;

    //Sleep(0);

    ReleaseMutex(g_Mutex);

    return 0;

}