nsprpub/pr/src/misc/prinrval.c@6474c204b198 (annotated)
nsprpub/pr/src/misc/prinrval.c
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 4 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 5 | |
| michael@0 | 6 | /* |
| michael@0 | 7 | * file: prinrval.c |
| michael@0 | 8 | * description: implementation for the kernel interval timing functions |
| michael@0 | 9 | */ |
| michael@0 | 10 | |
| michael@0 | 11 | #include "primpl.h" |
| michael@0 | 12 | |
| michael@0 | 13 | /* |
| michael@0 | 14 | *----------------------------------------------------------------------- |
| michael@0 | 15 | * |
| michael@0 | 16 | * _PR_InitClock -- |
| michael@0 | 17 | * |
| michael@0 | 18 | * |
| michael@0 | 19 | *----------------------------------------------------------------------- |
| michael@0 | 20 | */ |
| michael@0 | 21 | |
| michael@0 | 22 | void _PR_InitClock(void) |
| michael@0 | 23 | { |
| michael@0 | 24 | _PR_MD_INTERVAL_INIT(); |
| michael@0 | 25 | #ifdef DEBUG |
| michael@0 | 26 | { |
| michael@0 | 27 | PRIntervalTime ticksPerSec = PR_TicksPerSecond(); |
| michael@0 | 28 | |
| michael@0 | 29 | PR_ASSERT(ticksPerSec >= PR_INTERVAL_MIN); |
| michael@0 | 30 | PR_ASSERT(ticksPerSec <= PR_INTERVAL_MAX); |
| michael@0 | 31 | } |
| michael@0 | 32 | #endif /* DEBUG */ |
| michael@0 | 33 | } |
| michael@0 | 34 | |
| michael@0 | 35 | PR_IMPLEMENT(PRIntervalTime) PR_IntervalNow(void) |
| michael@0 | 36 | { |
| michael@0 | 37 | if (!_pr_initialized) _PR_ImplicitInitialization(); |
| michael@0 | 38 | return _PR_MD_GET_INTERVAL(); |
| michael@0 | 39 | } /* PR_IntervalNow */ |
| michael@0 | 40 | |
| michael@0 | 41 | PR_EXTERN(PRUint32) PR_TicksPerSecond(void) |
| michael@0 | 42 | { |
| michael@0 | 43 | if (!_pr_initialized) _PR_ImplicitInitialization(); |
| michael@0 | 44 | return _PR_MD_INTERVAL_PER_SEC(); |
| michael@0 | 45 | } /* PR_TicksPerSecond */ |
| michael@0 | 46 | |
| michael@0 | 47 | PR_IMPLEMENT(PRIntervalTime) PR_SecondsToInterval(PRUint32 seconds) |
| michael@0 | 48 | { |
| michael@0 | 49 | return seconds * PR_TicksPerSecond(); |
| michael@0 | 50 | } /* PR_SecondsToInterval */ |
| michael@0 | 51 | |
| michael@0 | 52 | PR_IMPLEMENT(PRIntervalTime) PR_MillisecondsToInterval(PRUint32 milli) |
| michael@0 | 53 | { |
| michael@0 | 54 | PRIntervalTime ticks; |
| michael@0 | 55 | PRUint64 tock, tps, msecPerSec, rounding; |
| michael@0 | 56 | LL_UI2L(tock, milli); |
| michael@0 | 57 | LL_I2L(msecPerSec, PR_MSEC_PER_SEC); |
| michael@0 | 58 | LL_I2L(rounding, (PR_MSEC_PER_SEC >> 1)); |
| michael@0 | 59 | LL_I2L(tps, PR_TicksPerSecond()); |
| michael@0 | 60 | LL_MUL(tock, tock, tps); |
| michael@0 | 61 | LL_ADD(tock, tock, rounding); |
| michael@0 | 62 | LL_DIV(tock, tock, msecPerSec); |
| michael@0 | 63 | LL_L2UI(ticks, tock); |
| michael@0 | 64 | return ticks; |
| michael@0 | 65 | } /* PR_MillisecondsToInterval */ |
| michael@0 | 66 | |
| michael@0 | 67 | PR_IMPLEMENT(PRIntervalTime) PR_MicrosecondsToInterval(PRUint32 micro) |
| michael@0 | 68 | { |
| michael@0 | 69 | PRIntervalTime ticks; |
| michael@0 | 70 | PRUint64 tock, tps, usecPerSec, rounding; |
| michael@0 | 71 | LL_UI2L(tock, micro); |
| michael@0 | 72 | LL_I2L(usecPerSec, PR_USEC_PER_SEC); |
| michael@0 | 73 | LL_I2L(rounding, (PR_USEC_PER_SEC >> 1)); |
| michael@0 | 74 | LL_I2L(tps, PR_TicksPerSecond()); |
| michael@0 | 75 | LL_MUL(tock, tock, tps); |
| michael@0 | 76 | LL_ADD(tock, tock, rounding); |
| michael@0 | 77 | LL_DIV(tock, tock, usecPerSec); |
| michael@0 | 78 | LL_L2UI(ticks, tock); |
| michael@0 | 79 | return ticks; |
| michael@0 | 80 | } /* PR_MicrosecondsToInterval */ |
| michael@0 | 81 | |
| michael@0 | 82 | PR_IMPLEMENT(PRUint32) PR_IntervalToSeconds(PRIntervalTime ticks) |
| michael@0 | 83 | { |
| michael@0 | 84 | return ticks / PR_TicksPerSecond(); |
| michael@0 | 85 | } /* PR_IntervalToSeconds */ |
| michael@0 | 86 | |
| michael@0 | 87 | PR_IMPLEMENT(PRUint32) PR_IntervalToMilliseconds(PRIntervalTime ticks) |
| michael@0 | 88 | { |
| michael@0 | 89 | PRUint32 milli; |
| michael@0 | 90 | PRUint64 tock, tps, msecPerSec, rounding; |
| michael@0 | 91 | LL_UI2L(tock, ticks); |
| michael@0 | 92 | LL_I2L(msecPerSec, PR_MSEC_PER_SEC); |
| michael@0 | 93 | LL_I2L(tps, PR_TicksPerSecond()); |
| michael@0 | 94 | LL_USHR(rounding, tps, 1); |
| michael@0 | 95 | LL_MUL(tock, tock, msecPerSec); |
| michael@0 | 96 | LL_ADD(tock, tock, rounding); |
| michael@0 | 97 | LL_DIV(tock, tock, tps); |
| michael@0 | 98 | LL_L2UI(milli, tock); |
| michael@0 | 99 | return milli; |
| michael@0 | 100 | } /* PR_IntervalToMilliseconds */ |
| michael@0 | 101 | |
| michael@0 | 102 | PR_IMPLEMENT(PRUint32) PR_IntervalToMicroseconds(PRIntervalTime ticks) |
| michael@0 | 103 | { |
| michael@0 | 104 | PRUint32 micro; |
| michael@0 | 105 | PRUint64 tock, tps, usecPerSec, rounding; |
| michael@0 | 106 | LL_UI2L(tock, ticks); |
| michael@0 | 107 | LL_I2L(usecPerSec, PR_USEC_PER_SEC); |
| michael@0 | 108 | LL_I2L(tps, PR_TicksPerSecond()); |
| michael@0 | 109 | LL_USHR(rounding, tps, 1); |
| michael@0 | 110 | LL_MUL(tock, tock, usecPerSec); |
| michael@0 | 111 | LL_ADD(tock, tock, rounding); |
| michael@0 | 112 | LL_DIV(tock, tock, tps); |
| michael@0 | 113 | LL_L2UI(micro, tock); |
| michael@0 | 114 | return micro; |
| michael@0 | 115 | } /* PR_IntervalToMicroseconds */ |
| michael@0 | 116 | |
| michael@0 | 117 | /* prinrval.c */ |
| michael@0 | 118 |
