[Solved] Delay Function

[zodiac976]

I am looking for a way to implement an efficient delay
function but I am having no luck. I wanted to be able
to bring up a screen then wait for a few seconds before
transitioning to the next screen. I do believe C++ does
not have a standard delay so any help on this matter is
appreciated.

[eatcomics]

Can't you just do delay(2000); or whatever??? that would delay for 2 seconds right???
If not can't you do a loop... say make a function like this:

Code: Select all

void stop(int time){
     int count;
     while (count < time){
          ++count;
     };
}

[dandymcgee]

Well I'm not sure about C++, but if you're using SDL check out SDL_Delay().

[hurstshifter]

I am looking for a way to implement an efficient delay
function but I am having no luck. I wanted to be able
to bring up a screen then wait for a few seconds before
transitioning to the next screen. I do believe C++ does
not have a standard delay so any help on this matter is
appreciated.

I believe you could use ctime to accomplish this(time.h). Basically do something like

Code: Select all

#include <time.h>
#include <stdio.h>

void Delay(int seconds)
{
    time_t start;
    time_t current;

    start = time(NULL);
    current = time(NULL);
    
    while( difftime(start, current) <= seconds)
    {
         current = time(NULL);
     }

}



int main(void)
{
    ... stuff here

    /*call for time delay*/
    int seconds  = 5;


    Delay(seconds);
    
   ...more stuff

   return 0;
}

I could be completely wrong here. Read up on time.h here.

http://www.cplusplus.com/reference/clibrary/ctime/

[MarauderIIC]

#include <windows.h> has Sleep(int milliseconds)
You may want to #define WIN32_LEAN_AND_MEAN

Linux has an equivalent -- sleep(int milliseconds) [I think it's millseconds but I'm not 100%] -- and it's simple to wrap, if you want to maintain portability without using SDL.

You don't want to loop because this will eat CPU, and is known as a busy wait. Sleep() actually tells the OS to ignore your program for x millseconds.

[zodiac976]

#include <windows.h> has Sleep(int milliseconds)
You may want to #define WIN32_LEAN_AND_MEAN

Linux has an equivalent -- sleep(int milliseconds) [I think it's millseconds but I'm not 100%] -- and it's simple to wrap, if you want to maintain portability without using SDL.

You don't want to loop because this will eat CPU, and is known as a busy wait. Sleep() actually tells the OS to ignore your program for x millseconds.

Yea I knew that looping to get a delay was bad. I don't
know much about portability but I don't think it's important
for me for now. Thanks, I will check it out.

[eatcomics]

you know I think I was thinking of SDL_Delay() or whatever...

[MarauderIIC]

you know I think I was thinking of SDL_Delay() or whatever...

If you're not using SDL though, you need Sleep() and it'd be silly to use SDL just for a sleep function :)

[eatcomics]

Yeah, but I was thinking that I had seen delay(millisecs) somewhere and that's why I mentioned it I forgot it was SDL... But thanks for the sleep thing I never knew that, it will for sure come in handy

[zodiac976]

The Sleep() function under window.h works great thanks.