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| 1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 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 #ifndef THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_BASE_LAZY_NOW_H_ | 5 #ifndef THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_BASE_LAZY_NOW_H_ |
| 6 #define THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_BASE_LAZY_NOW_H_ | 6 #define THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_BASE_LAZY_NOW_H_ |
| 7 | 7 |
| 8 #include "base/time/time.h" | 8 #include "base/time/time.h" |
| 9 #include "public/platform/WebCommon.h" | 9 #include "platform/PlatformExport.h" |
| 10 | 10 |
| 11 namespace base { | 11 namespace base { |
| 12 class TickClock; | 12 class TickClock; |
| 13 } | 13 } |
| 14 | 14 |
| 15 namespace blink { | 15 namespace blink { |
| 16 namespace scheduler { | 16 namespace scheduler { |
| 17 | 17 |
| 18 // Now() is somewhat expensive so it makes sense not to call Now() unless we | 18 // Now() is somewhat expensive so it makes sense not to call Now() unless we |
| 19 // really need to. | 19 // really need to. |
| 20 class BLINK_PLATFORM_EXPORT LazyNow { | 20 class PLATFORM_EXPORT LazyNow { |
| 21 public: | 21 public: |
| 22 explicit LazyNow(base::TimeTicks now) : tick_clock_(nullptr), now_(now) { | 22 explicit LazyNow(base::TimeTicks now) : tick_clock_(nullptr), now_(now) { |
| 23 DCHECK(!now.is_null()); | 23 DCHECK(!now.is_null()); |
| 24 } | 24 } |
| 25 | 25 |
| 26 explicit LazyNow(base::TickClock* tick_clock) : tick_clock_(tick_clock) {} | 26 explicit LazyNow(base::TickClock* tick_clock) : tick_clock_(tick_clock) {} |
| 27 | 27 |
| 28 base::TimeTicks Now(); | 28 base::TimeTicks Now(); |
| 29 | 29 |
| 30 private: | 30 private: |
| 31 base::TickClock* tick_clock_; // NOT OWNED | 31 base::TickClock* tick_clock_; // NOT OWNED |
| 32 base::TimeTicks now_; | 32 base::TimeTicks now_; |
| 33 }; | 33 }; |
| 34 | 34 |
| 35 } // namespace scheduler | 35 } // namespace scheduler |
| 36 } // namespace blink | 36 } // namespace blink |
| 37 | 37 |
| 38 #endif // THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_BASE_LAZY_NOW_H_ | 38 #endif // THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_BASE_LAZY_NOW_H_ |
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