NIRTimer

I just created a very simple timer. It is just a wraper around the gettimeofday() funtion, but it make the code using it so much simpler and nice. I enjoyed writing this, and you are invited to improve this if you have any nice idea. --NirSoffer

Typical Usage:

1. import "NIRTimer.h"

NIRTimer timer = [[NIRTimer alloc] init];

[timer start]; [someObject doLongOperation]; [timer stop];

NSLog(@"doLongOperation: %6.3f seconds", [timer seconds]);

[timer start]; [someObject doMore]; [timer stop];

NSLog(@"doMore: %6.3f seconds", [timer secondsSinceStart]); NSLog(@"Total: %6.3f seconds", [timer seconds]);

---

Here is the code: // // NIRTimer.h // DirectionService // // Created by Nir Soffer on Wed Jun 04 2003. // Copyright (c) 2003 Nir Soffer. All rights reserved. //




1. import <Foundation/Foundation.h>

@interface NIRTimer : NSObject {

   long started;
   long time;
   BOOL isRunning;

}

// reset - (void)reset; - (void)resetWithSeconds:(double)newSeconds; - (void)resetWithMicroseconds:(long)newMicroseconds;

// starting and stoping - (void)start; - (void)stop;

// reporting total time - (long)microseconds; - (double)seconds;

// reporting elapsed time - from last start - (long)microsecondsSinceStart; - (double)secondsSinceStart;

@end

// // NIRTimer.m // DirectionService // // Created by Nir Soffer on Wed Jun 04 2003. // Copyright (c) 2003 Nir Soffer. All rights reserved. //

1. import "NIRTimer.h"
2. import <sys/time.h>

@interface NIRTimer (NIRTimerPrivate) - (long)_currentTime; @end

@implementation NIRTimer

// reset - (void)reset {

   // Reset with zero microsends
   [self resetWithMicroseconds:0];

}

- (void)resetWithSeconds:(double)newSeconds {

   // Convert to microseconds and reset with microseconds
   long newMicroseconds = lround(newSeconds  1000000);
   [self resetWithMicroseconds:newMicroseconds];

}

- (void)resetWithMicroseconds:(long)newMicroseconds {

   // main reset
   if (isRunning) isRunning = NO;
   time = newMicroseconds;

}

// starting and stoping - (void)start {

   if (isRunning) return;
   
   started = [self _currentTime];
   isRunning = YES;

}

- (void)stop {

   if (! isRunning) return;

   time = time + [self _currentTime] - started;
   isRunning = NO;

}

// reporting time - (long)microseconds {

   if (isRunning){
       // report the current total, like -stop, without stoping
       return time + [self _currentTime] - started;       
   } else {
       // report the time recorded
       return time;
   }

}

- (double)seconds {

   return [self microseconds] / 1000000.0;

}

// reporting elapsed time - from last start - (long)microsecondsSinceStart {

   if (isRunning){
       // report the time from the last start
       return [self _currentTime] - started;
   } else {
       // report the time recorded
       return time;
   }

}

- (double)secondsSinceStart {

   return [self microsecondsSinceStart] / 1000000.0;

}

@end

@implementation NIRTimer (NIRTimerPrivate)

- (long)_currentTime {

   struct timeval tp;
   gettimeofday(&tp, NULL);
   return (tp.tv_sec  1000000 + tp.tv_usec);

}

@end