OOProfilingStopwatch.h File Reference

import "OOCocoa.h"
import "OOFunctionAttributes.h"
import "OOTypes.h"
import <mach/mach_time.h>

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Classes
class	OOProfilingStopwatch

Macros
#define	OO_PROFILING_STOPWATCH_MACH_ABSOLUTE_TIME   1
#define	OOGetHighResTime   mach_absolute_time
#define	OODisposeHighResTime(time)   do { (void)time; } while (0)
#define	OOCopyHighResTime(time)   ((OOHighResTimeValue)time)

Typedefs
typedef uint64_t	OOHighResTimeValue

Functions
OOTimeDelta	OOHighResTimeDeltaInSeconds (OOHighResTimeValue startTime, OOHighResTimeValue endTime)

Macro Definition Documentation

OO_PROFILING_STOPWATCH_MACH_ABSOLUTE_TIME

#define OO_PROFILING_STOPWATCH_MACH_ABSOLUTE_TIME   1

Definition at line 52 of file OOProfilingStopwatch.h.

OOCopyHighResTime

#define OOCopyHighResTime

(

time

)

((OOHighResTimeValue)time)

Definition at line 59 of file OOProfilingStopwatch.h.

OODisposeHighResTime

#define OODisposeHighResTime

(

time

)

do { (void)time; } while (0)

Definition at line 58 of file OOProfilingStopwatch.h.

OOGetHighResTime

#define OOGetHighResTime   mach_absolute_time

Definition at line 57 of file OOProfilingStopwatch.h.

Typedef Documentation

OOHighResTimeValue

typedef uint64_t OOHighResTimeValue

Definition at line 55 of file OOProfilingStopwatch.h.

Function Documentation

OOHighResTimeDeltaInSeconds()

OOTimeDelta OOHighResTimeDeltaInSeconds	(	OOHighResTimeValue	startTime,
		OOHighResTimeValue	endTime
	)

Definition at line 115 of file OOProfilingStopwatch.m.

{
#if OO_PROFILING_STOPWATCH_MACH_ABSOLUTE_TIME
    uint64_t diff = endTime - startTime;
    static double conversion = 0.0;
    
    if (EXPECT_NOT(conversion == 0.0))
    {
        mach_timebase_info_data_t info;
        kern_return_t err = mach_timebase_info(&info);
        
        if (err == 0)
        {
            conversion = 1e-9 * (double)info.numer / (double)info.denom;
        }
    }
    
    return conversion * (double)diff;
#elif OO_PROFILING_STOPWATCH_WINDOWS
    return 1e-3 * (double)(endTime - startTime);
#elif OO_PROFILING_STOPWATCH_GETTIMEOFDAY
    int_fast32_t deltaS = (int_fast32_t)endTime.tv_sec - (int_fast32_t)startTime.tv_sec;
    int_fast32_t deltaU = (int_fast32_t)endTime.tv_usec - (int_fast32_t)startTime.tv_usec;
    double result = deltaU;
    result = (result * 1e-6) + deltaS;
    return result;
#elif OO_PROFILING_STOPWATCH_JS_NOW
    return 1e-6 * (double)(endTime - startTime);
#endif
}

Referenced by OOJSResumeTimeLimiter(), and OperationCallback().

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