需要更好的等待解决方案 [英] Need a better wait solution

问题描述

最近我一直在用C ++写一个程序，ping三个不同的网站，然后根据通过或失败，它将等待5分钟或30秒，然后再次尝试。

Recently I have been writing a program in C++ that pings three different websites and then depending on pass or fail it will wait 5 minutes or 30 seconds before it tries again.

目前我一直在使用ctime库和以下函数来处理我的等待，然而根据我的CPU表这是一个不能接受的解决方案。

Currently I have been using the ctime library and the following function to process my waiting however according to my CPU meter this is an unacceptable solution.

void wait (int seconds)
{
   clock_t endwait;
   endwait = clock () + seconds * CLOCKS_PER_SEC;
   while (clock () < endwait) {}
}

为什么这个解决方案是不可接受的是因为根据我的CPU计算机程序运行在我的CPU的48％到50％的等待。我有一个Athlon 64 x2 1.2ghz处理器。有没有办法我的谦虚130线程序甚至应该接近50％。

The reason why this solution is unacceptable is because according to my cpu meter the program runs at 48% to 50% of my CPU when waiting. I have a Athlon 64 x2 1.2ghz processor. There is no way my modest 130 line program should even get near 50%.

我想知道的是如何更好地写我的等待函数，以便它只使用最少的资源？谢谢。

What I am asking to know is how can I write my wait function better so that it is only using minimal resources? Thank you.

推荐答案

为了保持便携性，您可以使用 Boost :: Thread 用于睡觉：

To stay portable you could use Boost::Thread for sleeping:

#include <boost/thread/thread.hpp>

int main()
{
    //waits 2 seconds
    boost::this_thread::sleep( boost::posix_time::seconds(1) );
    boost::this_thread::sleep( boost::posix_time::milliseconds(1000) );

    return 0;
}

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