windows下利用线程池完成多任务的分配和运行

在做项目的过程中有时候为了提升效率，用了多线程的方法来对任务进行分割和应用，后来发现，采用线程池的方法能更好的利用线程资源来计算任务，网上有很多关于如何运行线程池的例子，msdn上也给出了对应的例子：https://msdn.microsoft.com/en-us/library/windows/desktop/ms686980(v=vs.85).aspx

感兴趣的话大家可以去看看，这里我给出一个简单的demo，利用线程池单次调用多次调用，例子如下：

#include<Windows.h>
#include<iostream>
#include<cstdlib>

using namespace std;

#define THREAD_NUM 10

struct tempStruct
{
    int a;
    int b;
};

VOID CALLBACK SimpleCallback(PTP_CALLBACK_INSTANCE Instance,void* Context);
VOID CALLBACK WorkCallbackTemp(PTP_CALLBACK_INSTANCE Instance, void* Context, PTP_WORK Work);

void main()
{
    PTP_WORK tpWork[THREAD_NUM];
    tempStruct transferStruct[THREAD_NUM];

    for ( int i = 0; i< THREAD_NUM; i++ )
    {
        transferStruct[i].a = i;
        transferStruct[i].b = i+1;
    }

    //单次工作提交
    TrySubmitThreadpoolCallback(SimpleCallback,&transferStruct[2],NULL);

    for ( int i = 0; i< THREAD_NUM; i++ )
        tpWork[i] = CreateThreadpoolWork(WorkCallbackTemp,&transferStruct[i],NULL);

    //提交工作
    for ( int i = 0; i< THREAD_NUM; i++ )
        SubmitThreadpoolWork(tpWork[i]);

    //等待工作结束
    for ( int i = 0; i< THREAD_NUM; i++ )
        WaitForThreadpoolWorkCallbacks(tpWork[i],false);

    //关闭工作对象
    for ( int i = 0; i< THREAD_NUM; i++ )
        CloseThreadpoolWork(tpWork[i]);

    system("pause");
}

VOID CALLBACK SimpleCallback(PTP_CALLBACK_INSTANCE Instance,void* Context)
{
    tempStruct *pt = (tempStruct *)Context;

    int pruduct = pt->a * pt->b;
    cout <<"Simple struct a: "<<pt->a<<" struct_temp.b: "<<pt->b<<" pruduct: "<<pruduct<<endl;
}

VOID CALLBACK WorkCallbackTemp(PTP_CALLBACK_INSTANCE Instance, void* Context, PTP_WORK Work)
{
    tempStruct *pt = (tempStruct *)Context;

    int sum = pt->a + pt->b;
    cout <<"Work struct a: "<<pt->a<<" struct_temp.b: "<<pt->b<<" sum: "<<sum<<endl;
}

PS有个网站的教程写得很好，收益很多大家也可以去看看：http://www.cnblogs.com/kzloser/archive/2013/03/11/2909221.html

做个mark,希望对需要的朋友有帮助！