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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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80 TimeTicks ticks = Now(); | 80 TimeTicks ticks = Now(); |
81 TimeDelta elapsed = ticks - start_ticks_; | 81 TimeDelta elapsed = ticks - start_ticks_; |
82 ASSERT(elapsed.InMicroseconds() >= 0); | 82 ASSERT(elapsed.InMicroseconds() >= 0); |
83 start_ticks_ = ticks; | 83 start_ticks_ = ticks; |
84 ASSERT(IsStarted()); | 84 ASSERT(IsStarted()); |
85 return elapsed; | 85 return elapsed; |
86 } | 86 } |
87 | 87 |
88 // Returns the time elapsed since the previous start. This method may only | 88 // Returns the time elapsed since the previous start. This method may only |
89 // be called on a previously started timer. | 89 // be called on a previously started timer. |
90 TimeDelta Elapsed() const V8_WARN_UNUSED_RESULT { | 90 TimeDelta Elapsed() const { |
91 ASSERT(IsStarted()); | 91 ASSERT(IsStarted()); |
92 TimeDelta elapsed = Now() - start_ticks_; | 92 TimeDelta elapsed = Now() - start_ticks_; |
93 ASSERT(elapsed.InMicroseconds() >= 0); | 93 ASSERT(elapsed.InMicroseconds() >= 0); |
94 return elapsed; | 94 return elapsed; |
95 } | 95 } |
96 | 96 |
97 // Returns |true| if the specified |time_delta| has elapsed since the | 97 // Returns |true| if the specified |time_delta| has elapsed since the |
98 // previous start, or |false| if not. This method may only be called on | 98 // previous start, or |false| if not. This method may only be called on |
99 // a previously started timer. | 99 // a previously started timer. |
100 bool HasExpired(TimeDelta time_delta) const V8_WARN_UNUSED_RESULT { | 100 bool HasExpired(TimeDelta time_delta) const { |
101 ASSERT(IsStarted()); | 101 ASSERT(IsStarted()); |
102 return Elapsed() >= time_delta; | 102 return Elapsed() >= time_delta; |
103 } | 103 } |
104 | 104 |
105 private: | 105 private: |
106 V8_INLINE(static TimeTicks Now()) V8_WARN_UNUSED_RESULT { | 106 V8_INLINE(static TimeTicks Now()) { |
107 TimeTicks now = TimeTicks::HighResNow(); | 107 TimeTicks now = TimeTicks::HighResNow(); |
108 ASSERT(!now.IsNull()); | 108 ASSERT(!now.IsNull()); |
109 return now; | 109 return now; |
110 } | 110 } |
111 | 111 |
112 TimeTicks start_ticks_; | 112 TimeTicks start_ticks_; |
113 #ifdef DEBUG | 113 #ifdef DEBUG |
114 bool started_; | 114 bool started_; |
115 #endif | 115 #endif |
116 }; | 116 }; |
117 | 117 |
118 } } // namespace v8::internal | 118 } } // namespace v8::internal |
119 | 119 |
120 #endif // V8_PLATFORM_ELAPSED_TIMER_H_ | 120 #endif // V8_PLATFORM_ELAPSED_TIMER_H_ |
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