Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
637 views
in Technique[技术] by (71.8m points)

visual c++ - need to call a function at periodic time intervals in c++

I am writing a program in c++ where I need to call a function at periodic time intervals, say every 10ms or so. I've never done anything related to time or clocks in c++, is this a quick and easy problem or one of those where there is no neat solution?

Thanks!

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

To complete the question, the code from @user534498 can be easily adapted to have the periodic tick interval. It's just needed to determinate the next start time point at the beginning of the timer thread loop and sleep_until that time point after executing the function.

#include <iostream>
#include <chrono>
#include <thread>
#include <functional>

void timer_start(std::function<void(void)> func, unsigned int interval)
{
  std::thread([func, interval]()
  { 
    while (true)
    { 
      auto x = std::chrono::steady_clock::now() + std::chrono::milliseconds(interval);
      func();
      std::this_thread::sleep_until(x);
    }
  }).detach();
}

void do_something()
{
  std::cout << "I am doing something" << std::endl;
}

int main()
{
  timer_start(do_something, 1000);
  while (true)
    ;
}

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...