Jump to content
  • Advertisement
Sign in to follow this  
TEUTON

Accurate Timer

This topic is 4495 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Recommended Posts

I wanted a timer for 20 seconds I wrote this code but it eats up lot of my CPU time...any other efficient way to handle this on windows.
#include <iostream> 
#include <ctime> 

using std::cout;
using std::endl; 
int main() 
{ 
        clock_t start = clock(); 

        while(clock() < (CLOCKS_PER_SEC * 20) + start) 
        { 
                //Code 
        } 
        cout << "Time's up." << endl; 
return 0;
}


Share this post


Link to post
Share on other sites
Advertisement
If you wanted to wait that long, while doing something else useful in the meantime, you could use one of the system time querying functions, and wait until the difference becomes 20 secs. timeGetTime() seems to be the easiest to use.

Share this post


Link to post
Share on other sites
Also note that if you want it to be accurate, Sleep() is not the way to go, since it'll sleep for at least the time specified. So if you pass in 20000ms, it may end up waiting for 20500ms or something.

If it's not needed to be too accurate then it's not a problem though.

Share this post


Link to post
Share on other sites
To make the list complete, I'll throw in QueryPerformanceCounter().

I think, now we've covered all popular options.

Share this post


Link to post
Share on other sites
Guest Anonymous Poster
Quote:
Original post by Morpheus011
check out GetTickCount()

timeGetTime() == GetTickCount()

Share this post


Link to post
Share on other sites
>So if you pass in 20000ms, it may end up waiting for 20500ms or something.
Last time I cheched it - on my machine - it was acurate to around 1ms (win2k)

>I think, now we've covered all popular options.
You forgot the good old 'rdtsc' :)

Share this post


Link to post
Share on other sites
Sign in to follow this  

  • Advertisement
×

Important Information

By using GameDev.net, you agree to our community Guidelines, Terms of Use, and Privacy Policy.

We are the game development community.

Whether you are an indie, hobbyist, AAA developer, or just trying to learn, GameDev.net is the place for you to learn, share, and connect with the games industry. Learn more About Us or sign up!

Sign me up!