Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(47)

Side by Side Diff: src/platform-win32.cc

Issue 10867057: Adding a high-resolution timer to platform win32. (Closed) Base URL: http://git.chromium.org/external/v8.git@master
Patch Set: fixed code style Created 8 years, 3 months ago
Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.
Jump to:
View unified diff | Download patch
« no previous file with comments | « no previous file | no next file » | no next file with comments »
Toggle Intra-line Diffs ('i') | Expand Comments ('e') | Collapse Comments ('c') | Show Comments Hide Comments ('s')
OLDNEW
1 // Copyright 2012 the V8 project authors. All rights reserved. 1 // Copyright 2012 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
(...skipping 573 matching lines...) Expand 10 before | Expand all | Expand 10 after
584 584
585 585
586 // Returns current time as the number of milliseconds since 586 // Returns current time as the number of milliseconds since
587 // 00:00:00 UTC, January 1, 1970. 587 // 00:00:00 UTC, January 1, 1970.
588 double OS::TimeCurrentMillis() { 588 double OS::TimeCurrentMillis() {
589 Time t; 589 Time t;
590 t.SetToCurrentTime(); 590 t.SetToCurrentTime();
591 return t.ToJSTime(); 591 return t.ToJSTime();
592 } 592 }
593 593
594 // Returns the tickcounter based on timeGetTime. 594
595 static LARGE_INTEGER frequency = 0;
596
597
598 // Returns the tickcounter based on QueryPerformanceCounter or timeGetTime.
595 int64_t OS::Ticks() { 599 int64_t OS::Ticks() {
600 static LARGE_INTEGER tick;
601 if (frequency != 0 && QueryPerformanceCounter(&tick)) {
602 return static_cast<int64_t>(tick.QuadPart * 1e6 / frequency->QuadPart);
603 }
596 return timeGetTime() * 1000; // Convert to microseconds. 604 return timeGetTime() * 1000; // Convert to microseconds.
597 } 605 }
598 606
599 607
600 // Returns a string identifying the current timezone taking into 608 // Returns a string identifying the current timezone taking into
601 // account daylight saving. 609 // account daylight saving.
602 const char* OS::LocalTimezone(double time) { 610 const char* OS::LocalTimezone(double time) {
603 return Time(time).LocalTimezone(); 611 return Time(time).LocalTimezone();
604 } 612 }
605 613
(...skipping 1474 matching lines...) Expand 10 before | Expand all | Expand 10 after
2080 2088
2081 2089
2082 void OS::SetUp() { 2090 void OS::SetUp() {
2083 // Seed the random number generator. 2091 // Seed the random number generator.
2084 // Convert the current time to a 64-bit integer first, before converting it 2092 // Convert the current time to a 64-bit integer first, before converting it
2085 // to an unsigned. Going directly can cause an overflow and the seed to be 2093 // to an unsigned. Going directly can cause an overflow and the seed to be
2086 // set to all ones. The seed will be identical for different instances that 2094 // set to all ones. The seed will be identical for different instances that
2087 // call this setup code within the same millisecond. 2095 // call this setup code within the same millisecond.
2088 uint64_t seed = static_cast<uint64_t>(TimeCurrentMillis()); 2096 uint64_t seed = static_cast<uint64_t>(TimeCurrentMillis());
2089 srand(static_cast<unsigned int>(seed)); 2097 srand(static_cast<unsigned int>(seed));
2098 // Get the number of ticks per second that is used in OS::Ticks()
2099 QueryPerformanceFrequency(&frequency);
2090 limit_mutex = CreateMutex(); 2100 limit_mutex = CreateMutex();
2091 SamplerThread::SetUp(); 2101 SamplerThread::SetUp();
2092 } 2102 }
2093 2103
2094 2104
2095 void OS::TearDown() { 2105 void OS::TearDown() {
2106 frequency = 0;
2096 SamplerThread::TearDown(); 2107 SamplerThread::TearDown();
2097 delete limit_mutex; 2108 delete limit_mutex;
2098 } 2109 }
2099 2110
2100 2111
2101 Sampler::Sampler(Isolate* isolate, int interval) 2112 Sampler::Sampler(Isolate* isolate, int interval)
2102 : isolate_(isolate), 2113 : isolate_(isolate),
2103 interval_(interval), 2114 interval_(interval),
2104 profiling_(false), 2115 profiling_(false),
2105 active_(false), 2116 active_(false),
(...skipping 16 matching lines...) Expand all
2122 2133
2123 2134
2124 void Sampler::Stop() { 2135 void Sampler::Stop() {
2125 ASSERT(IsActive()); 2136 ASSERT(IsActive());
2126 SamplerThread::RemoveActiveSampler(this); 2137 SamplerThread::RemoveActiveSampler(this);
2127 SetActive(false); 2138 SetActive(false);
2128 } 2139 }
2129 2140
2130 2141
2131 } } // namespace v8::internal 2142 } } // namespace v8::internal
OLDNEW
« no previous file with comments | « no previous file | no next file » | no next file with comments »

Powered by Google App Engine
This is Rietveld 408576698