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Issue 7995: Move Time, TimeDelta and TimeTicks into namespace base. (Closed) Base URL: svn://chrome-svn/chrome/trunk/src/
Patch Set: Created 12 years, 2 months ago
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1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2006-2008 The Chromium 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 5
6 // Windows Timer Primer 6 // Windows Timer Primer
7 // 7 //
8 // A good article: http://www.ddj.com/windows/184416651 8 // A good article: http://www.ddj.com/windows/184416651
9 // A good mozilla bug: http://bugzilla.mozilla.org/show_bug.cgi?id=363258 9 // A good mozilla bug: http://bugzilla.mozilla.org/show_bug.cgi?id=363258
10 // 10 //
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40 #include <windows.h> 40 #include <windows.h>
41 #include <mmsystem.h> 41 #include <mmsystem.h>
42 42
43 #include "base/basictypes.h" 43 #include "base/basictypes.h"
44 #include "base/lock.h" 44 #include "base/lock.h"
45 #include "base/logging.h" 45 #include "base/logging.h"
46 #include "base/cpu.h" 46 #include "base/cpu.h"
47 #include "base/singleton.h" 47 #include "base/singleton.h"
48 #include "base/system_monitor.h" 48 #include "base/system_monitor.h"
49 49
50 using base::Time;
51 using base::TimeDelta;
52 using base::TimeTicks;
53
50 namespace { 54 namespace {
51 55
52 // From MSDN, FILETIME "Contains a 64-bit value representing the number of 56 // From MSDN, FILETIME "Contains a 64-bit value representing the number of
53 // 100-nanosecond intervals since January 1, 1601 (UTC)." 57 // 100-nanosecond intervals since January 1, 1601 (UTC)."
54 int64 FileTimeToMicroseconds(const FILETIME& ft) { 58 int64 FileTimeToMicroseconds(const FILETIME& ft) {
55 // Need to bit_cast to fix alignment, then divide by 10 to convert 59 // Need to bit_cast to fix alignment, then divide by 10 to convert
56 // 100-nanoseconds to milliseconds. This only works on little-endian 60 // 100-nanoseconds to milliseconds. This only works on little-endian
57 // machines. 61 // machines.
58 return bit_cast<int64, FILETIME>(ft) / 10; 62 return bit_cast<int64, FILETIME>(ft) / 10;
59 } 63 }
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382 386
383 // static 387 // static
384 TimeTicks TimeTicks::Now() { 388 TimeTicks TimeTicks::Now() {
385 return TimeTicks() + Singleton<NowSingleton>::get()->Now(); 389 return TimeTicks() + Singleton<NowSingleton>::get()->Now();
386 } 390 }
387 391
388 // static 392 // static
389 TimeTicks TimeTicks::HighResNow() { 393 TimeTicks TimeTicks::HighResNow() {
390 return TimeTicks() + Singleton<HighResNowSingleton>::get()->Now(); 394 return TimeTicks() + Singleton<HighResNowSingleton>::get()->Now();
391 } 395 }
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