ACE定时器

每一秒钟打印一行

http://www.tuicool.com/articles/Zb263e

计时器的打开和关闭封装

http://andylin02.iteye.com/blog/440572

自己写的简单计时器：程序開始之后2秒钟之后运行第一次到时触发的动作，以后每隔一秒钟都会运行同样的动作；当运行总次数到达3次之后就终止计时，整个程序退出，并停止事件监听，释放资源

#include <iostream>
#include "ace/Log_Msg.h"
#include "ace/Event_Handler.h"
#include "ace/Reactor.h"
#include "ace/Thread_Manager.h"

bool stop_event_loop = false;//是否须要终止计时器服务

class My_Timer_Handler : public ACE_Event_Handler
{
public:
    My_Timer_Handler(const int delay,const int interval);
    ~My_Timer_Handler();
    int handle_timeout(const ACE_Time_Value& , const void *act /* = 0 */);//计时器到期后运行的回调函数
private:
    int n_;//循环计时的次数
    long time_handle_;//在计时器队列中的ID
};

My_Timer_Handler::My_Timer_Handler(const int delay,const int interval):n_(0)
{
    std::cout<<"My_Timer_Handler()"<<std::endl;
    this->reactor(ACE_Reactor::instance());
    this->time_handle_ = this->reactor()->schedule_timer(this,//在这里注冊定时器
        0,
        ACE_Time_Value(delay),//程序一開始延迟delay秒開始首次运行到期函数
        ACE_Time_Value(interval));//循环计时，每隔interval秒反复运行
}

My_Timer_Handler::~My_Timer_Handler()
{
    std::cout<<"~My_Timer_Handler()"<<std::endl;
}

int My_Timer_Handler::handle_timeout(const ACE_Time_Value& , const void *act /* = 0 */)
{
    if (++this->n_>3)
    {
        ACE_Reactor::instance()->cancel_timer(this->time_handle_);
        stop_event_loop = true;
        std::cout<<"cancle_timer"<<std::endl;
    }
    else
    {
        std::cout<<"my timer handler handled timeout"<<std::endl;
    }

    return 0;
}

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

    My_Timer_Handler my_handle(2,1);

    while (true)
    {
        if (stop_event_loop)
        {
            std::cout<<"stop handle time"<<std::endl;
            break;
        }
        ACE_Reactor::instance()->handle_events();
    }

    return 0;
}

执行结果例如以下：

My_Timer_Handler()

my timer handler handled timeout

my timer handler handled timeout

my timer handler handled timeout

cancle_timer

stop handle time

~My_Timer_Handler()

请按随意键继续. . .