多线程 学习笔记<1> 线程建立

先看下面一个例子

//Tread.cpp#include <iostream>#include <cstdlib>using namespace std;#include <Windows.h>#include <process.h>unsigned _stdcall ThreadProc1(void* param);unsigned _stdcall ThreadProc2(void* param);int main(){ HANDLE handle1 = (HANDLE)_beginthreadex(NULL, 0, ThreadProc1, NULL, NULL, NULL); HANDLE handle2 = (HANDLE)_beginthreadex(NULL, 0, ThreadProc2, NULL, NULL, NULL); if ((handle1 == NULL) | (handle2 == NULL)) {  cout<<"create thread failed"<<endl;  system("pause");  return 0; } WaitForSingleObject(handle1, INFINITE); cout<<"Thread1 is over"<<endl; WaitForSingleObject(handle2, INFINITE);  cout<<"Thread2 is over"<<endl; CloseHandle(handle1); CloseHandle(handle2); system("pause"); return 0;}unsigned _stdcall ThreadProc1(void* param){for(int i=0; i<3; i++){ cout<<"_beginthreadex create thread___1"<<endl; Beep(1000,500);} return 0;}unsigned _stdcall ThreadProc2(void* param){for(int i=0; i<6; i++){ cout<<"_beginthreadex create thread___2"<<endl; Beep(1000,500);} return 0;}

_beginthreadx 参数依次为

安全属性，默认为NULL

线程堆栈大小，默认为0，表示同父线程

线程函数名，线程任务

线程参数，此处为NULL，若有参数建议结构体传递

线程标志，0（NULL）或者CREATE_SUSPEND 立即执行或者创建后挂起

线程ID，不用的话可以为NULL

下面是另一个传递参数的线程例子。

对比可以发现一些现成的书写特点。

Thread.cpp#include <Windows.h>#include <process.h>#include <iostream>#include <cstdlib>using namespace std;struct ThreadInfo{int param;};unsigned _stdcall ThreadProc(void* param){ThreadInfo * Info = (ThreadInfo*)param;int count = Info->param;for(int i=0; i<count; i++){ cout<<"_beginthreadex create thread"<<endl; cout<<"The Thread ID is"<<GetCurrentThreadId()<<endl; Beep(1000,500);} return 0;}int main(){ HANDLE handle; DWORD ThreadID; unsigned param = 5; handle = (HANDLE)_beginthreadex(NULL, 0, &ThreadProc, (LPVOID)¶m, 0, (unsigned *)&ThreadID); if (handle == NULL) {  cout<<"create thread failed"<<endl;  system("pause");  return 0; } WaitForSingleObject(handle, INFINITE); cout<<"Thread is over"<<endl; CloseHandle(handle); system("pause"); return 0;}

额，这个还是没用到线程 ID。但是得到了。