唤醒boost :: sleep timer并在C++中将其重置为0

Question

我每10秒左右需要一次心跳信号.为了实现这一点,我使用以下构造函数生成了一个类:

HeartBeat::HeartBeat (int Seconds, MessageQueue * MsgQueue)
{
TimerSeconds = Seconds;
    pQueue = MsgQueue;
    isRunning = true;
    assert(!m_pHBThread);
    m_pHBThread = shared_ptr<thread>(new thread(boost::bind(&HeartBeat::TimerStart,this)));
}

在新线程中调用以下方法:

void HeartBeat::TimerStart ()
{
while (1)
{
    cout << "heartbeat..." << endl;
    boost::this_thread::sleep(boost::posix_time::seconds (TimerSeconds));
    addHeartBeat();
}
}

这会产生任何问题的心跳.但是我希望能够将睡眠定时器重置为零.是否有一种简单的方法可以做到这一点,或者我应该使用除此之外的其他方式

 boost::this_thread::sleep

为了我的睡眠？

---

操作系统:Redhat

IDE:Eclipse

代码语言:C++

---

编辑:

我看过用了

m_pHBThread->interrupt();

它似乎是我所追求的,所以谢谢你!

Answer 1

这听起来就像异步计时器那样.既然你已经使用了boost,那么从长远来看,使用boost自己的异步定时器是否有意义？

#include <iostream>
#include <boost/thread.hpp>
#include <boost/date_time.hpp>
#include <boost/asio.hpp>
boost::posix_time::ptime now()
{
        return boost::posix_time::microsec_clock::local_time();
}
class HeartBeat {
    boost::asio::io_service ios;
    boost::asio::deadline_timer timer;
    boost::posix_time::time_duration TimerSeconds;
    boost::thread thread;
 public:
    HeartBeat(int Seconds) : ios(), timer(ios),
        TimerSeconds(boost::posix_time::seconds(Seconds))
    {
        reset(); // has to start timer before starting the thread
        thread = boost::thread(boost::bind(&boost::asio::io_service::run,
                                           &ios));
    }
    ~HeartBeat() {
        ios.stop();
        thread.join();
    }
    void reset()
    {
        timer.expires_from_now(TimerSeconds);
        timer.async_wait(boost::bind(&HeartBeat::TimerExpired,
                        this, boost::asio::placeholders::error));
    }
    void TimerExpired(const boost::system::error_code& ec)
    {
        if (ec == boost::asio::error::operation_aborted) {
           std::cout << "[" << now() << "] timer was reset" << std::endl;
        } else {
           std::cout << "[" << now() << "] heartbeat..." << std::endl;
           reset();
        }
    }
};
int main()
{
    std::cout << "["  << now() << "] starting up.\n";
    HeartBeat hb(10);
    sleep(15);
    std::cout << "["  << now() << "] Resetting the timer\n";
    hb.reset();
    sleep(15);
}

测试运行:

~ $ ./test
[2011-Sep-07 12:08:17.348625] starting up.
[2011-Sep-07 12:08:27.348944] heartbeat...
[2011-Sep-07 12:08:32.349002] Resetting the timer
[2011-Sep-07 12:08:32.349108] timer was reset
[2011-Sep-07 12:08:42.349160] heartbeat...