Changeset 2172

Timestamp:

05/07/07 04:10:37 (5 years ago)

Author:

kris

Message:

attempt to resolve accuracy issues

Files:

trunk/tango/util/time/StopWatch.d

r2167	r2172
65	65	public struct StopWatch
66	66	{
67		private ~~Interval~~ started;
	67	private ulong started;
68	68	private static Interval multiplier = 1.0 / 1_000_000.0;
69
70		~~version (Win32)~~
71		~~private static ulong timerStart;~~
72	69
73	70	/***********************************************************************
…	…
90	87	Interval stop ()
91	88	{
92		return ~~timer - started~~;
	89	return multiplier * (timer - started);
93	90	}
94	91
…	…
105	102	ulong freq;
106	103
107		if (! QueryPerformanceFrequency (&freq))
108		throw new Exception ("high-resolution timer is not available");
109
110		QueryPerformanceCounter (&timerStart);
	104	QueryPerformanceFrequency (&freq);
111	105	multiplier = 1.0 / freq;
112	106	}
…	…
119	113	***********************************************************************/
120	114
121		private static ~~Interval~~ timer ()
	115	private static ulong timer ()
122	116	{
123	117	version (Posix)
…	…
127	121	throw new Exception ("Timer :: linux timer is not available");
128	122
129		return (cast(~~Interval) tv.tv_sec) + tv.tv_usec * multiplier~~;
	123	return (cast(ulong) tv.tv_sec * 1_000_000) + tv.tv_usec;
130	124	}
131	125
…	…
134	128	ulong now;
135	129
136		QueryPerformanceCounter (&now);
137		return (now - timerStart) * multiplier;
	130	if (! QueryPerformanceCounter (&now))
	131	throw new Exception ("high-resolution timer is not available");
	132
	133	return now;
138	134	}
139	135	}
…	…
154	150	t.start;
155	151
156		for (int i=0; i < 10_000_000; ++i)
	152	for (int i=0; i < 100_000_000; ++i)
157	153	{}
158	154	Stdout.format ("{:f9}", t.stop).newline;