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==> MachTimer.h <== | |
// | |
// MachTimer | |
// Tout | |
// | |
// Code sourced from http://zpasternack.org/high-resolution-timing-in-cocoa/ | |
// | |
#import <Foundation/Foundation.h> | |
#include <mach/mach_time.h> | |
@interface MachTimer : NSObject | |
+ (id) timer; | |
- (void) start; | |
- (uint64_t) elapsed; | |
- (Float64)elapsedSeconds; | |
@end | |
==> MachTimer.m <== | |
// | |
// MachTimer | |
// Tout | |
// | |
// Code sourced from http://zpasternack.org/high-resolution-timing-in-cocoa/ | |
// | |
#import "MachTimer.h" | |
static mach_timebase_info_data_t timeBase; | |
@implementation MachTimer | |
{ | |
uint64_t timeZero; | |
} | |
+ (void) initialize | |
{ | |
(void) mach_timebase_info( &timeBase ); | |
} | |
+ (id) timer | |
{ | |
#if( __has_feature( objc_arc ) ) | |
return [[[self class] alloc] init]; | |
#else | |
return [[[[self class] alloc] init] autorelease]; | |
#endif | |
} | |
- (id) init | |
{ | |
if( (self = [super init]) ) { | |
timeZero = mach_absolute_time(); | |
} | |
return self; | |
} | |
- (void) start | |
{ | |
timeZero = mach_absolute_time(); | |
} | |
- (uint64_t) elapsed | |
{ | |
return mach_absolute_time() - timeZero; | |
} | |
- (Float64)elapsedSeconds | |
{ | |
return (Float64)(mach_absolute_time() - timeZero) * (Float64)timeBase.numer / (Float64)timeBase.denom / (Float64)NSEC_PER_SEC; | |
} | |
@end |
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