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| 1 // Copyright 2013 the V8 project authors. All rights reserved. | 1 // Copyright 2013 the V8 project authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "src/platform/time.h" | 5 #include "src/platform/time.h" |
| 6 | 6 |
| 7 #if V8_OS_POSIX | 7 #if V8_OS_POSIX |
| 8 #include <sys/time.h> | 8 #include <sys/time.h> |
| 9 #endif | 9 #endif |
| 10 #if V8_OS_MACOSX | 10 #if V8_OS_MACOSX |
| 11 #include <mach/mach_time.h> | 11 #include <mach/mach_time.h> |
| 12 #endif | 12 #endif |
| 13 | 13 |
| 14 #include <string.h> | 14 #include <string.h> |
| 15 | 15 |
| 16 #if V8_OS_WIN |
| 17 #include "src/base/lazy-instance.h" |
| 18 #include "src/base/win32-headers.h" |
| 19 #endif |
| 16 #include "src/checks.h" | 20 #include "src/checks.h" |
| 17 #include "src/cpu.h" | 21 #include "src/cpu.h" |
| 18 #include "src/platform.h" | 22 #include "src/platform.h" |
| 19 #if V8_OS_WIN | |
| 20 #include "src/win32-headers.h" | |
| 21 #endif | |
| 22 | 23 |
| 23 namespace v8 { | 24 namespace v8 { |
| 24 namespace internal { | 25 namespace internal { |
| 25 | 26 |
| 26 TimeDelta TimeDelta::FromDays(int days) { | 27 TimeDelta TimeDelta::FromDays(int days) { |
| 27 return TimeDelta(days * Time::kMicrosecondsPerDay); | 28 return TimeDelta(days * Time::kMicrosecondsPerDay); |
| 28 } | 29 } |
| 29 | 30 |
| 30 | 31 |
| 31 TimeDelta TimeDelta::FromHours(int hours) { | 32 TimeDelta TimeDelta::FromHours(int hours) { |
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| 186 ::GetSystemTimeAsFileTime(&ft); | 187 ::GetSystemTimeAsFileTime(&ft); |
| 187 return Time::FromFiletime(ft); | 188 return Time::FromFiletime(ft); |
| 188 } | 189 } |
| 189 | 190 |
| 190 TimeTicks initial_ticks_; | 191 TimeTicks initial_ticks_; |
| 191 Time initial_time_; | 192 Time initial_time_; |
| 192 Mutex mutex_; | 193 Mutex mutex_; |
| 193 }; | 194 }; |
| 194 | 195 |
| 195 | 196 |
| 196 static LazyStaticInstance<Clock, | 197 static base::LazyStaticInstance<Clock, base::DefaultConstructTrait<Clock>, |
| 197 DefaultConstructTrait<Clock>, | 198 base::ThreadSafeInitOnceTrait>::type clock = |
| 198 ThreadSafeInitOnceTrait>::type clock = LAZY_STATIC_INSTANCE_INITIALIZER; | 199 LAZY_STATIC_INSTANCE_INITIALIZER; |
| 199 | 200 |
| 200 | 201 |
| 201 Time Time::Now() { | 202 Time Time::Now() { |
| 202 return clock.Pointer()->Now(); | 203 return clock.Pointer()->Now(); |
| 203 } | 204 } |
| 204 | 205 |
| 205 | 206 |
| 206 Time Time::NowFromSystemTime() { | 207 Time Time::NowFromSystemTime() { |
| 207 return clock.Pointer()->NowFromSystemTime(); | 208 return clock.Pointer()->NowFromSystemTime(); |
| 208 } | 209 } |
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| 455 return false; | 456 return false; |
| 456 } | 457 } |
| 457 | 458 |
| 458 private: | 459 private: |
| 459 Mutex mutex_; | 460 Mutex mutex_; |
| 460 DWORD last_seen_now_; | 461 DWORD last_seen_now_; |
| 461 int64_t rollover_ms_; | 462 int64_t rollover_ms_; |
| 462 }; | 463 }; |
| 463 | 464 |
| 464 | 465 |
| 465 static LazyStaticInstance<RolloverProtectedTickClock, | 466 static base::LazyStaticInstance< |
| 466 DefaultConstructTrait<RolloverProtectedTickClock>, | 467 RolloverProtectedTickClock, |
| 467 ThreadSafeInitOnceTrait>::type tick_clock = | 468 base::DefaultConstructTrait<RolloverProtectedTickClock>, |
| 468 LAZY_STATIC_INSTANCE_INITIALIZER; | 469 base::ThreadSafeInitOnceTrait>::type tick_clock = |
| 470 LAZY_STATIC_INSTANCE_INITIALIZER; |
| 469 | 471 |
| 470 | 472 |
| 471 struct CreateHighResTickClockTrait { | 473 struct CreateHighResTickClockTrait { |
| 472 static TickClock* Create() { | 474 static TickClock* Create() { |
| 473 // Check if the installed hardware supports a high-resolution performance | 475 // Check if the installed hardware supports a high-resolution performance |
| 474 // counter, and if not fallback to the low-resolution tick clock. | 476 // counter, and if not fallback to the low-resolution tick clock. |
| 475 LARGE_INTEGER ticks_per_second; | 477 LARGE_INTEGER ticks_per_second; |
| 476 if (!QueryPerformanceFrequency(&ticks_per_second)) { | 478 if (!QueryPerformanceFrequency(&ticks_per_second)) { |
| 477 return tick_clock.Pointer(); | 479 return tick_clock.Pointer(); |
| 478 } | 480 } |
| 479 | 481 |
| 480 // On Athlon X2 CPUs (e.g. model 15) the QueryPerformanceCounter | 482 // On Athlon X2 CPUs (e.g. model 15) the QueryPerformanceCounter |
| 481 // is unreliable, fallback to the low-resolution tick clock. | 483 // is unreliable, fallback to the low-resolution tick clock. |
| 482 CPU cpu; | 484 CPU cpu; |
| 483 if (strcmp(cpu.vendor(), "AuthenticAMD") == 0 && cpu.family() == 15) { | 485 if (strcmp(cpu.vendor(), "AuthenticAMD") == 0 && cpu.family() == 15) { |
| 484 return tick_clock.Pointer(); | 486 return tick_clock.Pointer(); |
| 485 } | 487 } |
| 486 | 488 |
| 487 return new HighResolutionTickClock(ticks_per_second.QuadPart); | 489 return new HighResolutionTickClock(ticks_per_second.QuadPart); |
| 488 } | 490 } |
| 489 }; | 491 }; |
| 490 | 492 |
| 491 | 493 |
| 492 static LazyDynamicInstance<TickClock, | 494 static base::LazyDynamicInstance<TickClock, |
| 493 CreateHighResTickClockTrait, | 495 CreateHighResTickClockTrait, |
| 494 ThreadSafeInitOnceTrait>::type high_res_tick_clock = | 496 base::ThreadSafeInitOnceTrait>::type high_res_tick_clock = |
| 495 LAZY_DYNAMIC_INSTANCE_INITIALIZER; | 497 LAZY_DYNAMIC_INSTANCE_INITIALIZER; |
| 496 | 498 |
| 497 | 499 |
| 498 TimeTicks TimeTicks::Now() { | 500 TimeTicks TimeTicks::Now() { |
| 499 // Make sure we never return 0 here. | 501 // Make sure we never return 0 here. |
| 500 TimeTicks ticks(tick_clock.Pointer()->Now()); | 502 TimeTicks ticks(tick_clock.Pointer()->Now()); |
| 501 ASSERT(!ticks.IsNull()); | 503 ASSERT(!ticks.IsNull()); |
| 502 return ticks; | 504 return ticks; |
| 503 } | 505 } |
| 504 | 506 |
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| 559 | 561 |
| 560 | 562 |
| 561 // static | 563 // static |
| 562 bool TimeTicks::IsHighResolutionClockWorking() { | 564 bool TimeTicks::IsHighResolutionClockWorking() { |
| 563 return true; | 565 return true; |
| 564 } | 566 } |
| 565 | 567 |
| 566 #endif // V8_OS_WIN | 568 #endif // V8_OS_WIN |
| 567 | 569 |
| 568 } } // namespace v8::internal | 570 } } // namespace v8::internal |
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