nspr/pr/src/misc/prinrval.c - Issue 2078763002: Delete bundled copy of NSS and replace with README.

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Issue 2078763002: Delete bundled copy of NSS and replace with README. (Closed) Base URL: https://chromium.googlesource.com/chromium/deps/nss@master

Patch Set: Delete bundled copy of NSS and replace with README. Created 4 years, 6 months ago

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1 /* -- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -- */

2 /* This Source Code Form is subject to the terms of the Mozilla Public

3 * License, v. 2.0. If a copy of the MPL was not distributed with this

4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

5

6 /*

7 * file: prinrval.c

8 * description: implementation for the kernel interval timing functions

9 */

10

11 #include "primpl.h"

12

13 /*

14 *-----------------------------------------------------------------------

15 *

16 * _PR_InitClock --

17 *

18 *

19 *-----------------------------------------------------------------------

20 */

21

22 void _PR_InitClock(void)

23 {

24 _PR_MD_INTERVAL_INIT();

25 #ifdef DEBUG

26 {

27 PRIntervalTime ticksPerSec = PR_TicksPerSecond();

28

29 PR_ASSERT(ticksPerSec >= PR_INTERVAL_MIN);

30 PR_ASSERT(ticksPerSec <= PR_INTERVAL_MAX);

31 }

32 #endif /* DEBUG */

33 }

34

35 PR_IMPLEMENT(PRIntervalTime) PR_IntervalNow(void)

36 {

37 if (!_pr_initialized) _PR_ImplicitInitialization();

38 return _PR_MD_GET_INTERVAL();

39 } /* PR_IntervalNow */

40

41 PR_EXTERN(PRUint32) PR_TicksPerSecond(void)

42 {

43 if (!_pr_initialized) _PR_ImplicitInitialization();

44 return _PR_MD_INTERVAL_PER_SEC();

45 } /* PR_TicksPerSecond */

46

47 PR_IMPLEMENT(PRIntervalTime) PR_SecondsToInterval(PRUint32 seconds)

48 {

49 return seconds * PR_TicksPerSecond();

50 } /* PR_SecondsToInterval */

51

52 PR_IMPLEMENT(PRIntervalTime) PR_MillisecondsToInterval(PRUint32 milli)

53 {

54 PRIntervalTime ticks;

55 PRUint64 tock, tps, msecPerSec, rounding;

56 LL_UI2L(tock, milli);

57 LL_I2L(msecPerSec, PR_MSEC_PER_SEC);

58 LL_I2L(rounding, (PR_MSEC_PER_SEC >> 1));

59 LL_I2L(tps, PR_TicksPerSecond());

60 LL_MUL(tock, tock, tps);

61 LL_ADD(tock, tock, rounding);

62 LL_DIV(tock, tock, msecPerSec);

63 LL_L2UI(ticks, tock);

64 return ticks;

65 } /* PR_MillisecondsToInterval */

66

67 PR_IMPLEMENT(PRIntervalTime) PR_MicrosecondsToInterval(PRUint32 micro)

68 {

69 PRIntervalTime ticks;

70 PRUint64 tock, tps, usecPerSec, rounding;

71 LL_UI2L(tock, micro);

72 LL_I2L(usecPerSec, PR_USEC_PER_SEC);

73 LL_I2L(rounding, (PR_USEC_PER_SEC >> 1));

74 LL_I2L(tps, PR_TicksPerSecond());

75 LL_MUL(tock, tock, tps);

76 LL_ADD(tock, tock, rounding);

77 LL_DIV(tock, tock, usecPerSec);

78 LL_L2UI(ticks, tock);

79 return ticks;

80 } /* PR_MicrosecondsToInterval */

81

82 PR_IMPLEMENT(PRUint32) PR_IntervalToSeconds(PRIntervalTime ticks)

83 {

84 return ticks / PR_TicksPerSecond();

85 } /* PR_IntervalToSeconds */

86

87 PR_IMPLEMENT(PRUint32) PR_IntervalToMilliseconds(PRIntervalTime ticks)

88 {

89 PRUint32 milli;

90 PRUint64 tock, tps, msecPerSec, rounding;

91 LL_UI2L(tock, ticks);

92 LL_I2L(msecPerSec, PR_MSEC_PER_SEC);

93 LL_I2L(tps, PR_TicksPerSecond());

94 LL_USHR(rounding, tps, 1);

95 LL_MUL(tock, tock, msecPerSec);

96 LL_ADD(tock, tock, rounding);

97 LL_DIV(tock, tock, tps);

98 LL_L2UI(milli, tock);

99 return milli;

100 } /* PR_IntervalToMilliseconds */

101

102 PR_IMPLEMENT(PRUint32) PR_IntervalToMicroseconds(PRIntervalTime ticks)

103 {

104 PRUint32 micro;

105 PRUint64 tock, tps, usecPerSec, rounding;

106 LL_UI2L(tock, ticks);

107 LL_I2L(usecPerSec, PR_USEC_PER_SEC);

108 LL_I2L(tps, PR_TicksPerSecond());

109 LL_USHR(rounding, tps, 1);

110 LL_MUL(tock, tock, usecPerSec);

111 LL_ADD(tock, tock, rounding);

112 LL_DIV(tock, tock, tps);

113 LL_L2UI(micro, tock);

114 return micro;

115 } /* PR_IntervalToMicroseconds */

116

117 /* prinrval.c */

118

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