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:

#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. //

#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. //

#import “NIRTimer.h” #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