michael@0: /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /*
michael@0:  * file:			prinrval.c
michael@0:  * description:		implementation for the kernel interval timing functions
michael@0:  */
michael@0: 
michael@0: #include "primpl.h"
michael@0: 
michael@0: /*
michael@0:  *-----------------------------------------------------------------------
michael@0:  *
michael@0:  * _PR_InitClock --
michael@0:  *
michael@0:  *
michael@0:  *-----------------------------------------------------------------------
michael@0:  */
michael@0: 
michael@0: void _PR_InitClock(void)
michael@0: {
michael@0:     _PR_MD_INTERVAL_INIT();
michael@0: #ifdef DEBUG
michael@0:     {
michael@0:         PRIntervalTime ticksPerSec = PR_TicksPerSecond();
michael@0: 
michael@0:         PR_ASSERT(ticksPerSec >= PR_INTERVAL_MIN);
michael@0:         PR_ASSERT(ticksPerSec <= PR_INTERVAL_MAX);
michael@0:     }
michael@0: #endif /* DEBUG */
michael@0: }
michael@0: 
michael@0: PR_IMPLEMENT(PRIntervalTime) PR_IntervalNow(void)
michael@0: {
michael@0:     if (!_pr_initialized) _PR_ImplicitInitialization();
michael@0:     return _PR_MD_GET_INTERVAL();
michael@0: }  /* PR_IntervalNow */
michael@0: 
michael@0: PR_EXTERN(PRUint32) PR_TicksPerSecond(void)
michael@0: {
michael@0:     if (!_pr_initialized) _PR_ImplicitInitialization();
michael@0:     return _PR_MD_INTERVAL_PER_SEC();
michael@0: }  /* PR_TicksPerSecond */
michael@0: 
michael@0: PR_IMPLEMENT(PRIntervalTime) PR_SecondsToInterval(PRUint32 seconds)
michael@0: {
michael@0:     return seconds * PR_TicksPerSecond();
michael@0: }  /* PR_SecondsToInterval */
michael@0: 
michael@0: PR_IMPLEMENT(PRIntervalTime) PR_MillisecondsToInterval(PRUint32 milli)
michael@0: {
michael@0:     PRIntervalTime ticks;
michael@0:     PRUint64 tock, tps, msecPerSec, rounding;
michael@0:     LL_UI2L(tock, milli);
michael@0:     LL_I2L(msecPerSec, PR_MSEC_PER_SEC);
michael@0:     LL_I2L(rounding, (PR_MSEC_PER_SEC >> 1));
michael@0:     LL_I2L(tps, PR_TicksPerSecond());
michael@0:     LL_MUL(tock, tock, tps);
michael@0:     LL_ADD(tock, tock, rounding);
michael@0:     LL_DIV(tock, tock, msecPerSec);
michael@0:     LL_L2UI(ticks, tock);
michael@0:     return ticks;
michael@0: }  /* PR_MillisecondsToInterval */
michael@0: 
michael@0: PR_IMPLEMENT(PRIntervalTime) PR_MicrosecondsToInterval(PRUint32 micro)
michael@0: {
michael@0:     PRIntervalTime ticks;
michael@0:     PRUint64 tock, tps, usecPerSec, rounding;
michael@0:     LL_UI2L(tock, micro);
michael@0:     LL_I2L(usecPerSec, PR_USEC_PER_SEC);
michael@0:     LL_I2L(rounding, (PR_USEC_PER_SEC >> 1));
michael@0:     LL_I2L(tps, PR_TicksPerSecond());
michael@0:     LL_MUL(tock, tock, tps);
michael@0:     LL_ADD(tock, tock, rounding);
michael@0:     LL_DIV(tock, tock, usecPerSec);
michael@0:     LL_L2UI(ticks, tock);
michael@0:     return ticks;
michael@0: }  /* PR_MicrosecondsToInterval */
michael@0: 
michael@0: PR_IMPLEMENT(PRUint32) PR_IntervalToSeconds(PRIntervalTime ticks)
michael@0: {
michael@0:     return ticks / PR_TicksPerSecond();
michael@0: }  /* PR_IntervalToSeconds */
michael@0: 
michael@0: PR_IMPLEMENT(PRUint32) PR_IntervalToMilliseconds(PRIntervalTime ticks)
michael@0: {
michael@0:     PRUint32 milli;
michael@0:     PRUint64 tock, tps, msecPerSec, rounding;
michael@0:     LL_UI2L(tock, ticks);
michael@0:     LL_I2L(msecPerSec, PR_MSEC_PER_SEC);
michael@0:     LL_I2L(tps, PR_TicksPerSecond());
michael@0:     LL_USHR(rounding, tps, 1);
michael@0:     LL_MUL(tock, tock, msecPerSec);
michael@0:     LL_ADD(tock, tock, rounding);
michael@0:     LL_DIV(tock, tock, tps);
michael@0:     LL_L2UI(milli, tock);
michael@0:     return milli;
michael@0: }  /* PR_IntervalToMilliseconds */
michael@0: 
michael@0: PR_IMPLEMENT(PRUint32) PR_IntervalToMicroseconds(PRIntervalTime ticks)
michael@0: {
michael@0:     PRUint32 micro;
michael@0:     PRUint64 tock, tps, usecPerSec, rounding;
michael@0:     LL_UI2L(tock, ticks);
michael@0:     LL_I2L(usecPerSec, PR_USEC_PER_SEC);
michael@0:     LL_I2L(tps, PR_TicksPerSecond());
michael@0:     LL_USHR(rounding, tps, 1);
michael@0:     LL_MUL(tock, tock, usecPerSec);
michael@0:     LL_ADD(tock, tock, rounding);
michael@0:     LL_DIV(tock, tock, tps);
michael@0:     LL_L2UI(micro, tock);
michael@0:     return micro;
michael@0: }  /* PR_IntervalToMicroseconds */
michael@0: 
michael@0: /* prinrval.c */
michael@0: