1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/nsprpub/pr/src/misc/prinrval.c Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,118 @@
1.4 +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +/*
1.10 + * file: prinrval.c
1.11 + * description: implementation for the kernel interval timing functions
1.12 + */
1.13 +
1.14 +#include "primpl.h"
1.15 +
1.16 +/*
1.17 + *-----------------------------------------------------------------------
1.18 + *
1.19 + * _PR_InitClock --
1.20 + *
1.21 + *
1.22 + *-----------------------------------------------------------------------
1.23 + */
1.24 +
1.25 +void _PR_InitClock(void)
1.26 +{
1.27 + _PR_MD_INTERVAL_INIT();
1.28 +#ifdef DEBUG
1.29 + {
1.30 + PRIntervalTime ticksPerSec = PR_TicksPerSecond();
1.31 +
1.32 + PR_ASSERT(ticksPerSec >= PR_INTERVAL_MIN);
1.33 + PR_ASSERT(ticksPerSec <= PR_INTERVAL_MAX);
1.34 + }
1.35 +#endif /* DEBUG */
1.36 +}
1.37 +
1.38 +PR_IMPLEMENT(PRIntervalTime) PR_IntervalNow(void)
1.39 +{
1.40 + if (!_pr_initialized) _PR_ImplicitInitialization();
1.41 + return _PR_MD_GET_INTERVAL();
1.42 +} /* PR_IntervalNow */
1.43 +
1.44 +PR_EXTERN(PRUint32) PR_TicksPerSecond(void)
1.45 +{
1.46 + if (!_pr_initialized) _PR_ImplicitInitialization();
1.47 + return _PR_MD_INTERVAL_PER_SEC();
1.48 +} /* PR_TicksPerSecond */
1.49 +
1.50 +PR_IMPLEMENT(PRIntervalTime) PR_SecondsToInterval(PRUint32 seconds)
1.51 +{
1.52 + return seconds * PR_TicksPerSecond();
1.53 +} /* PR_SecondsToInterval */
1.54 +
1.55 +PR_IMPLEMENT(PRIntervalTime) PR_MillisecondsToInterval(PRUint32 milli)
1.56 +{
1.57 + PRIntervalTime ticks;
1.58 + PRUint64 tock, tps, msecPerSec, rounding;
1.59 + LL_UI2L(tock, milli);
1.60 + LL_I2L(msecPerSec, PR_MSEC_PER_SEC);
1.61 + LL_I2L(rounding, (PR_MSEC_PER_SEC >> 1));
1.62 + LL_I2L(tps, PR_TicksPerSecond());
1.63 + LL_MUL(tock, tock, tps);
1.64 + LL_ADD(tock, tock, rounding);
1.65 + LL_DIV(tock, tock, msecPerSec);
1.66 + LL_L2UI(ticks, tock);
1.67 + return ticks;
1.68 +} /* PR_MillisecondsToInterval */
1.69 +
1.70 +PR_IMPLEMENT(PRIntervalTime) PR_MicrosecondsToInterval(PRUint32 micro)
1.71 +{
1.72 + PRIntervalTime ticks;
1.73 + PRUint64 tock, tps, usecPerSec, rounding;
1.74 + LL_UI2L(tock, micro);
1.75 + LL_I2L(usecPerSec, PR_USEC_PER_SEC);
1.76 + LL_I2L(rounding, (PR_USEC_PER_SEC >> 1));
1.77 + LL_I2L(tps, PR_TicksPerSecond());
1.78 + LL_MUL(tock, tock, tps);
1.79 + LL_ADD(tock, tock, rounding);
1.80 + LL_DIV(tock, tock, usecPerSec);
1.81 + LL_L2UI(ticks, tock);
1.82 + return ticks;
1.83 +} /* PR_MicrosecondsToInterval */
1.84 +
1.85 +PR_IMPLEMENT(PRUint32) PR_IntervalToSeconds(PRIntervalTime ticks)
1.86 +{
1.87 + return ticks / PR_TicksPerSecond();
1.88 +} /* PR_IntervalToSeconds */
1.89 +
1.90 +PR_IMPLEMENT(PRUint32) PR_IntervalToMilliseconds(PRIntervalTime ticks)
1.91 +{
1.92 + PRUint32 milli;
1.93 + PRUint64 tock, tps, msecPerSec, rounding;
1.94 + LL_UI2L(tock, ticks);
1.95 + LL_I2L(msecPerSec, PR_MSEC_PER_SEC);
1.96 + LL_I2L(tps, PR_TicksPerSecond());
1.97 + LL_USHR(rounding, tps, 1);
1.98 + LL_MUL(tock, tock, msecPerSec);
1.99 + LL_ADD(tock, tock, rounding);
1.100 + LL_DIV(tock, tock, tps);
1.101 + LL_L2UI(milli, tock);
1.102 + return milli;
1.103 +} /* PR_IntervalToMilliseconds */
1.104 +
1.105 +PR_IMPLEMENT(PRUint32) PR_IntervalToMicroseconds(PRIntervalTime ticks)
1.106 +{
1.107 + PRUint32 micro;
1.108 + PRUint64 tock, tps, usecPerSec, rounding;
1.109 + LL_UI2L(tock, ticks);
1.110 + LL_I2L(usecPerSec, PR_USEC_PER_SEC);
1.111 + LL_I2L(tps, PR_TicksPerSecond());
1.112 + LL_USHR(rounding, tps, 1);
1.113 + LL_MUL(tock, tock, usecPerSec);
1.114 + LL_ADD(tock, tock, rounding);
1.115 + LL_DIV(tock, tock, tps);
1.116 + LL_L2UI(micro, tock);
1.117 + return micro;
1.118 +} /* PR_IntervalToMicroseconds */
1.119 +
1.120 +/* prinrval.c */
1.121 +
