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Issue 23624006: Fix Visual Studio debug build after r16398. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 7 years, 3 months ago
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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 // 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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331 // With recent updates on HAL and newer BIOS, QPC is getting more reliable but 331 // With recent updates on HAL and newer BIOS, QPC is getting more reliable but
332 // it should be used with caution. 332 // it should be used with caution.
333 // 333 //
334 // (3) System time. The system time provides a low-resolution (typically 10ms 334 // (3) System time. The system time provides a low-resolution (typically 10ms
335 // to 55 milliseconds) time stamp but is comparatively less expensive to 335 // to 55 milliseconds) time stamp but is comparatively less expensive to
336 // retrieve and more reliable. 336 // retrieve and more reliable.
337 class HighResolutionTickClock V8_FINAL : public TickClock { 337 class HighResolutionTickClock V8_FINAL : public TickClock {
338 public: 338 public:
339 explicit HighResolutionTickClock(int64_t ticks_per_second) 339 explicit HighResolutionTickClock(int64_t ticks_per_second)
340 : ticks_per_second_(ticks_per_second) { 340 : ticks_per_second_(ticks_per_second) {
341 ASSERT_NE(0, ticks_per_second); 341 ASSERT_LT(0, ticks_per_second);
342 } 342 }
343 virtual ~HighResolutionTickClock() {} 343 virtual ~HighResolutionTickClock() {}
344 344
345 virtual int64_t Now() V8_OVERRIDE { 345 virtual int64_t Now() V8_OVERRIDE {
346 LARGE_INTEGER now; 346 LARGE_INTEGER now;
347 BOOL result = QueryPerformanceCounter(&now); 347 BOOL result = QueryPerformanceCounter(&now);
348 ASSERT(result); 348 ASSERT(result);
349 USE(result); 349 USE(result);
350 350
351 // Intentionally calculate microseconds in a round about manner to avoid 351 // Intentionally calculate microseconds in a round about manner to avoid
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473 ticks = (ts.tv_sec * Time::kMicrosecondsPerSecond + 473 ticks = (ts.tv_sec * Time::kMicrosecondsPerSecond +
474 ts.tv_nsec / Time::kNanosecondsPerMicrosecond); 474 ts.tv_nsec / Time::kNanosecondsPerMicrosecond);
475 #endif // V8_OS_MACOSX 475 #endif // V8_OS_MACOSX
476 // Make sure we never return 0 here. 476 // Make sure we never return 0 here.
477 return TimeTicks(ticks + 1); 477 return TimeTicks(ticks + 1);
478 } 478 }
479 479
480 #endif // V8_OS_WIN 480 #endif // V8_OS_WIN
481 481
482 } } // namespace v8::internal 482 } } // namespace v8::internal
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