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comparison tango/tango/core/sync/Config.d @ 132:1700239cab2e trunk

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[svn r136] MAJOR UNSTABLE UPDATE!!! Initial commit after moving to Tango instead of Phobos. Lots of bugfixes... This build is not suitable for most things.
author lindquist
date Fri, 11 Jan 2008 17:57:40 +0100
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131:5825d48b27d1 132:1700239cab2e
1 /**
2 * The config module contains utility routines and configuration information
3 * specific to this package.
4 *
5 * Copyright: Copyright (C) 2005-2006 Sean Kelly. All rights reserved.
6 * License: BSD style: $(LICENSE)
7 * Authors: Sean Kelly
8 */
9 module tango.core.sync.Config;
10
11
12 public import tango.core.Exception : SyncException;
13
14
15 version( Posix )
16 {
17 private import tango.stdc.posix.time;
18 private import tango.stdc.posix.sys.time;
19
20
21 void getTimespec( inout timespec t )
22 {
23 static if( is( typeof( clock_gettime ) ) )
24 {
25 clock_gettime( CLOCK_REALTIME, &t );
26 }
27 else
28 {
29 timeval tv;
30
31 gettimeofday( &tv, null );
32 (cast(byte*) &t)[0 .. t.sizeof] = 0;
33 t.tv_sec = cast(typeof(t.tv_sec)) tv.tv_sec;
34 t.tv_nsec = cast(typeof(t.tv_nsec)) tv.tv_usec * 1_000;
35 }
36 }
37
38
39 void adjTimespec( inout timespec t, double v )
40 {
41 enum
42 {
43 SECS_TO_NANOS = 1_000_000_000
44 }
45
46 // NOTE: The fractional value added to period is to correct fp error.
47 v += 0.000_000_000_1;
48
49 if( t.tv_sec.max - t.tv_sec < v )
50 {
51 t.tv_sec = t.tv_sec.max;
52 t.tv_nsec = 0;
53 }
54 else
55 {
56 alias typeof(t.tv_sec) Secs;
57 alias typeof(t.tv_nsec) Nanos;
58
59 t.tv_sec += cast(Secs) v;
60 auto ns = cast(long)((v % 1.0) * SECS_TO_NANOS);
61 if( SECS_TO_NANOS - t.tv_nsec < ns )
62 {
63 t.tv_sec += 1;
64 ns -= SECS_TO_NANOS;
65 }
66 t.tv_nsec += cast(Nanos) ns;
67 }
68 }
69 }