Mercurial > trustbridge > nss-cmake-static

annotate nspr/pr/src/misc/prinrval.c @ 3:150b72113545

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Add DBM and legacydb support
author Andre Heinecke <andre.heinecke@intevation.de>
date Tue, 05 Aug 2014 18:32:02 +0200
parents 1e5118fa0cb1
children
rev   line source
0
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1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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2 /* This Source Code Form is subject to the terms of the Mozilla Public
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3 * License, v. 2.0. If a copy of the MPL was not distributed with this
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4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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5
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6 /*
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7 * file: prinrval.c
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8 * description: implementation for the kernel interval timing functions
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9 */
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10
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11 #include "primpl.h"
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12
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13 /*
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14 *-----------------------------------------------------------------------
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15 *
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16 * _PR_InitClock --
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17 *
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18 *
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19 *-----------------------------------------------------------------------
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20 */
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21
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22 void _PR_InitClock(void)
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23 {
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24 _PR_MD_INTERVAL_INIT();
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25 #ifdef DEBUG
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26 {
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27 PRIntervalTime ticksPerSec = PR_TicksPerSecond();
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28
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29 PR_ASSERT(ticksPerSec >= PR_INTERVAL_MIN);
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30 PR_ASSERT(ticksPerSec <= PR_INTERVAL_MAX);
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31 }
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32 #endif /* DEBUG */
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33 }
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34
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35 PR_IMPLEMENT(PRIntervalTime) PR_IntervalNow(void)
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36 {
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37 if (!_pr_initialized) _PR_ImplicitInitialization();
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38 return _PR_MD_GET_INTERVAL();
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39 } /* PR_IntervalNow */
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40
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41 PR_EXTERN(PRUint32) PR_TicksPerSecond(void)
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42 {
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43 if (!_pr_initialized) _PR_ImplicitInitialization();
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44 return _PR_MD_INTERVAL_PER_SEC();
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45 } /* PR_TicksPerSecond */
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46
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47 PR_IMPLEMENT(PRIntervalTime) PR_SecondsToInterval(PRUint32 seconds)
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48 {
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49 return seconds * PR_TicksPerSecond();
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50 } /* PR_SecondsToInterval */
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51
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52 PR_IMPLEMENT(PRIntervalTime) PR_MillisecondsToInterval(PRUint32 milli)
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53 {
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54 PRIntervalTime ticks;
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55 PRUint64 tock, tps, msecPerSec, rounding;
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56 LL_UI2L(tock, milli);
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57 LL_I2L(msecPerSec, PR_MSEC_PER_SEC);
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58 LL_I2L(rounding, (PR_MSEC_PER_SEC >> 1));
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59 LL_I2L(tps, PR_TicksPerSecond());
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60 LL_MUL(tock, tock, tps);
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61 LL_ADD(tock, tock, rounding);
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62 LL_DIV(tock, tock, msecPerSec);
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63 LL_L2UI(ticks, tock);
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64 return ticks;
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65 } /* PR_MillisecondsToInterval */
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66
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67 PR_IMPLEMENT(PRIntervalTime) PR_MicrosecondsToInterval(PRUint32 micro)
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68 {
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69 PRIntervalTime ticks;
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70 PRUint64 tock, tps, usecPerSec, rounding;
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71 LL_UI2L(tock, micro);
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72 LL_I2L(usecPerSec, PR_USEC_PER_SEC);
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73 LL_I2L(rounding, (PR_USEC_PER_SEC >> 1));
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74 LL_I2L(tps, PR_TicksPerSecond());
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75 LL_MUL(tock, tock, tps);
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76 LL_ADD(tock, tock, rounding);
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77 LL_DIV(tock, tock, usecPerSec);
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78 LL_L2UI(ticks, tock);
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79 return ticks;
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80 } /* PR_MicrosecondsToInterval */
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81
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82 PR_IMPLEMENT(PRUint32) PR_IntervalToSeconds(PRIntervalTime ticks)
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83 {
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84 return ticks / PR_TicksPerSecond();
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85 } /* PR_IntervalToSeconds */
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86
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87 PR_IMPLEMENT(PRUint32) PR_IntervalToMilliseconds(PRIntervalTime ticks)
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88 {
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89 PRUint32 milli;
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90 PRUint64 tock, tps, msecPerSec, rounding;
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91 LL_UI2L(tock, ticks);
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92 LL_I2L(msecPerSec, PR_MSEC_PER_SEC);
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93 LL_I2L(tps, PR_TicksPerSecond());
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94 LL_USHR(rounding, tps, 1);
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95 LL_MUL(tock, tock, msecPerSec);
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96 LL_ADD(tock, tock, rounding);
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97 LL_DIV(tock, tock, tps);
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98 LL_L2UI(milli, tock);
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99 return milli;
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100 } /* PR_IntervalToMilliseconds */
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101
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102 PR_IMPLEMENT(PRUint32) PR_IntervalToMicroseconds(PRIntervalTime ticks)
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103 {
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104 PRUint32 micro;
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105 PRUint64 tock, tps, usecPerSec, rounding;
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106 LL_UI2L(tock, ticks);
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107 LL_I2L(usecPerSec, PR_USEC_PER_SEC);
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108 LL_I2L(tps, PR_TicksPerSecond());
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109 LL_USHR(rounding, tps, 1);
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110 LL_MUL(tock, tock, usecPerSec);
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111 LL_ADD(tock, tock, rounding);
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112 LL_DIV(tock, tock, tps);
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113 LL_L2UI(micro, tock);
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114 return micro;
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115 } /* PR_IntervalToMicroseconds */
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116
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117 /* prinrval.c */
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118
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