[SDL] reducing cpu power

Engines and Middleware Programming

Started by Odiee October 12, 2009 04:12 AM

1 comment, last by Rakshasa 14 years, 6 months ago

Odiee

100

Author

October 12, 2009 04:12 AM

Hello. How do I reduce CPU power on my program? When I use


while(quit)
{
 while(SDL_PollEvent(&event)
 {
  ...
 }
}

CPU on that program goes to 48-50%. How do I achieve 0% while nothing is happening?

Codeka

1,239

October 12, 2009 04:21 AM

I don't really know SDL, but it appears that SDL_WaitEvent does what you want - waits until an event (mouse move, keyboard press, etc) before returning. Note that this implies that it's also not updating the screen while nothing is happening, but presumably you already knew that...

War Worlds • Journal

Rakshasa

100

October 12, 2009 11:42 AM

SDL_Delay(a few milliseconds); at the end of the outer while loop should work wonders. Reduces the cpu use to near zero, but doesn't busy-wait until something happens.

Doesn't matter how much you lose as long as you make sure the winner loses enough blood.