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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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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31 // will only increase the system-wide timer if we're not running on battery | 31 // will only increase the system-wide timer if we're not running on battery |
32 // power. | 32 // power. |
33 | 33 |
34 #include "base/time/time.h" | 34 #include "base/time/time.h" |
35 | 35 |
36 #pragma comment(lib, "winmm.lib") | 36 #pragma comment(lib, "winmm.lib") |
37 #include <windows.h> | 37 #include <windows.h> |
38 #include <mmsystem.h> | 38 #include <mmsystem.h> |
39 #include <stdint.h> | 39 #include <stdint.h> |
40 | 40 |
| 41 #include "base/bit_cast.h" |
41 #include "base/cpu.h" | 42 #include "base/cpu.h" |
42 #include "base/lazy_instance.h" | 43 #include "base/lazy_instance.h" |
43 #include "base/logging.h" | 44 #include "base/logging.h" |
44 #include "base/synchronization/lock.h" | 45 #include "base/synchronization/lock.h" |
45 | 46 |
46 using base::ThreadTicks; | 47 using base::ThreadTicks; |
47 using base::Time; | 48 using base::Time; |
48 using base::TimeDelta; | 49 using base::TimeDelta; |
49 using base::TimeTicks; | 50 using base::TimeTicks; |
50 | 51 |
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606 TimeTicks TimeTicks::FromQPCValue(LONGLONG qpc_value) { | 607 TimeTicks TimeTicks::FromQPCValue(LONGLONG qpc_value) { |
607 return TimeTicks() + QPCValueToTimeDelta(qpc_value); | 608 return TimeTicks() + QPCValueToTimeDelta(qpc_value); |
608 } | 609 } |
609 | 610 |
610 // TimeDelta ------------------------------------------------------------------ | 611 // TimeDelta ------------------------------------------------------------------ |
611 | 612 |
612 // static | 613 // static |
613 TimeDelta TimeDelta::FromQPCValue(LONGLONG qpc_value) { | 614 TimeDelta TimeDelta::FromQPCValue(LONGLONG qpc_value) { |
614 return QPCValueToTimeDelta(qpc_value); | 615 return QPCValueToTimeDelta(qpc_value); |
615 } | 616 } |
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