C++ 多线程 CreateThread函数使用例

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#include <stdlib.h>#include <iostream>#include <list>#include <conio.h>#include <time.h>#include <algorithm>#include <windows.h>//头文件引用较多, 有一些与本程序无关/*HANDLE WINAPI CreateThread(    LPSECURITY_ATTRIBUTES   lpThreadAttributes, //线程安全相关的属性，常置为NULL    SIZE_T                  dwStackSize,        //新线程的初始化栈在大小，可设置为0    LPTHREAD_START_ROUTINE  lpStartAddress,     //被线程执行的回调函数，也称为线程函数    LPVOID                  lpParameter,        //传入线程函数的参数，不需传递参数时为NULL    DWORD                   dwCreationFlags,    //控制线程创建的标志    LPDWORD                 lpThreadId          //传出参数，用于获得线程ID，如果为NULL则不返回线程ID);*/using namespace std;volatile int b = 0;DWORD WINAPI ThreadProc(LPVOID lpParameter){int i = 10000;int *p = (int*)lpParameter;while(i--){(*p)++;b++;}return 0;}int main(int argc, char* argv[]){int a = 0;HANDLE hThread1 = CreateThread(NULL, 0, ThreadProc, &a, 0, NULL);HANDLE hThread2 = CreateThread(NULL, 0, ThreadProc, &a, 0, NULL);HANDLE hThread3 = CreateThread(NULL, 0, ThreadProc, &a, 0, NULL);HANDLE hThread4 = CreateThread(NULL, 0, ThreadProc, &a, 0, NULL);HANDLE hThread5 = CreateThread(NULL, 0, ThreadProc, &a, 0, NULL);Sleep(1000);CloseHandle(hThread1);    CloseHandle(hThread2);CloseHandle(hThread3);CloseHandle(hThread4);CloseHandle(hThread5);cout << "a = " << a << endl;cout << "b = " << b << endl;system("pause");return 0;}
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