Where is the TickCount() call?

Where is the TickCount() call? I have seen several threads on the web that recommend using the TickCount() call for iphone development. What do i need to "#include" to use this call? What framework is it in?

If not TickCount() what should I use to get milliseconds elapsed since the cpu started?

From stackoverflow

• CFAbsoluteTimeGetCurrent is probably what You are looking for. (Edit: …Or maybe not. Do You really need the time from CPU start, or do You just want to measure time in ms?)

  Jamey McElveen : Thanks! No I do not really need the time from CPU start, just need elapsed time in MS.

  zoul : Yep, then this function is exactly it. It returns CFAbsoluteTime, which is a double in disguise. If you type your variable CFAbsoluteTime instead of double, Xcode will decorate the number as time value when showing the value bubble in debugger.

• In my header file, I add the following:

  #include <time.h>
  
  @interface myAppDelegate : NSObject <UIApplicationDelegate> {
    ...
    clock_t initStart, initStop;
  }
  

  In my implementation file, I add the following:

  - (void) applicationDidFinishLaunching:(UIApplication *)application {
    srandom(time(NULL));
    initStart = clock();
    ...
  }
  
  ...
  
  - (void) applicationWillTerminate:(UIApplication *)application {
    initStop = clock();
    NSLog(@"Elapsed CPU time: %f", (double)(initStop - initStart) / CLOCKS_PER_SEC);
    ...
  }
  

  You could move these calls around your app as needed, to measure elapsed time.

  Jamey McElveen : Thank you! Only reason I am gonna use CFAbsoluteTimeGetCurrent is that Apple used CFAbsoluteTimeGetCurrent in their GLPaint example.