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Issue 53045: Move time related functions to POSIX platform file (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: '' Created 11 years, 9 months ago
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1 // Copyright 2006-2008 the V8 project authors. All rights reserved. 1 // Copyright 2006-2008 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without 2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are 3 // modification, are permitted provided that the following conditions are
4 // met: 4 // met:
5 // 5 //
6 // * Redistributions of source code must retain the above copyright 6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer. 7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above 8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following 9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided 10 // disclaimer in the documentation and/or other materials provided
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76 // Seed the random number generator. 76 // Seed the random number generator.
77 // Convert the current time to a 64-bit integer first, before converting it 77 // Convert the current time to a 64-bit integer first, before converting it
78 // to an unsigned. Going directly can cause an overflow and the seed to be 78 // to an unsigned. Going directly can cause an overflow and the seed to be
79 // set to all ones. The seed will be identical for different instances that 79 // set to all ones. The seed will be identical for different instances that
80 // call this setup code within the same millisecond. 80 // call this setup code within the same millisecond.
81 uint64_t seed = static_cast<uint64_t>(TimeCurrentMillis()); 81 uint64_t seed = static_cast<uint64_t>(TimeCurrentMillis());
82 srandom(static_cast<unsigned int>(seed)); 82 srandom(static_cast<unsigned int>(seed));
83 } 83 }
84 84
85 85
86 int OS::GetUserTime(uint32_t* secs, uint32_t* usecs) {
87 struct rusage usage;
88
89 if (getrusage(RUSAGE_SELF, &usage) < 0) return -1;
90 *secs = usage.ru_utime.tv_sec;
91 *usecs = usage.ru_utime.tv_usec;
92 return 0;
93 }
94
95
96 double OS::TimeCurrentMillis() {
97 struct timeval tv;
98 if (gettimeofday(&tv, NULL) < 0) return 0.0;
99 return (static_cast<double>(tv.tv_sec) * 1000) +
100 (static_cast<double>(tv.tv_usec) / 1000);
101 }
102
103
104 int64_t OS::Ticks() {
105 // FreeBSD's gettimeofday has microsecond resolution.
106 struct timeval tv;
107 if (gettimeofday(&tv, NULL) < 0)
108 return 0;
109 return (static_cast<int64_t>(tv.tv_sec) * 1000000) + tv.tv_usec;
110 }
111
112
113 char* OS::LocalTimezone(double time) {
114 time_t tv = static_cast<time_t>(floor(time/msPerSecond));
115 struct tm* t = localtime(&tv);
116 return const_cast<char*>(t->tm_zone);
117 }
118
119
120 double OS::DaylightSavingsOffset(double time) {
121 time_t tv = static_cast<time_t>(floor(time/msPerSecond));
122 struct tm* t = localtime(&tv);
123 return t->tm_isdst > 0 ? 3600 * msPerSecond : 0;
124 }
125
126
127 double OS::LocalTimeOffset() {
128 time_t tv = time(NULL);
129 struct tm* t = localtime(&tv);
130 // tm_gmtoff includes any daylight savings offset, so subtract it.
131 return static_cast<double>(t->tm_gmtoff * msPerSecond -
132 (t->tm_isdst > 0 ? 3600 * msPerSecond : 0));
133 }
134
135
136 FILE* OS::FOpen(const char* path, const char* mode) { 86 FILE* OS::FOpen(const char* path, const char* mode) {
137 return fopen(path, mode); 87 return fopen(path, mode);
138 } 88 }
139 89
140 90
141 void OS::Print(const char* format, ...) { 91 void OS::Print(const char* format, ...) {
142 va_list args; 92 va_list args;
143 va_start(args, format); 93 va_start(args, format);
144 VPrint(format, args); 94 VPrint(format, args);
145 va_end(args); 95 va_end(args);
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729 } 679 }
730 680
731 // This sampler is no longer the active sampler. 681 // This sampler is no longer the active sampler.
732 active_sampler_ = NULL; 682 active_sampler_ = NULL;
733 active_ = false; 683 active_ = false;
734 } 684 }
735 685
736 #endif // ENABLE_LOGGING_AND_PROFILING 686 #endif // ENABLE_LOGGING_AND_PROFILING
737 687
738 } } // namespace v8::internal 688 } } // namespace v8::internal
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