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1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 #ifndef RUNTIME_VM_TIMER_H_ | 5 #ifndef RUNTIME_VM_TIMER_H_ |
6 #define RUNTIME_VM_TIMER_H_ | 6 #define RUNTIME_VM_TIMER_H_ |
7 | 7 |
8 #include "platform/utils.h" | 8 #include "platform/utils.h" |
9 #include "vm/allocation.h" | 9 #include "vm/allocation.h" |
10 #include "vm/atomic.h" | 10 #include "vm/atomic.h" |
11 #include "vm/flags.h" | 11 #include "vm/flags.h" |
12 #include "vm/os.h" | 12 #include "vm/os.h" |
13 | 13 |
14 namespace dart { | 14 namespace dart { |
15 | 15 |
16 // Timer class allows timing of specific operations in the VM. | 16 // Timer class allows timing of specific operations in the VM. |
17 class Timer : public ValueObject { | 17 class Timer : public ValueObject { |
18 public: | 18 public: |
19 Timer(bool report, const char* message) | 19 Timer(bool report, const char* message) : report_(report), message_(message) { |
20 : report_(report), message_(message) { | |
21 Reset(); | 20 Reset(); |
22 } | 21 } |
23 ~Timer() {} | 22 ~Timer() {} |
24 | 23 |
25 // Start timer. | 24 // Start timer. |
26 void Start() { | 25 void Start() { |
27 start_ = OS::GetCurrentTimeMicros(); | 26 start_ = OS::GetCurrentTimeMicros(); |
28 running_ = true; | 27 running_ = true; |
29 } | 28 } |
30 | 29 |
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62 void Reset() { | 61 void Reset() { |
63 start_ = 0; | 62 start_ = 0; |
64 stop_ = 0; | 63 stop_ = 0; |
65 total_ = 0; | 64 total_ = 0; |
66 max_contiguous_ = 0; | 65 max_contiguous_ = 0; |
67 running_ = false; | 66 running_ = false; |
68 } | 67 } |
69 | 68 |
70 bool IsReset() const { | 69 bool IsReset() const { |
71 return (start_ == 0) && (stop_ == 0) && (total_ == 0) && | 70 return (start_ == 0) && (stop_ == 0) && (total_ == 0) && |
72 (max_contiguous_ == 0) && !running_; | 71 (max_contiguous_ == 0) && !running_; |
73 } | 72 } |
74 | 73 |
75 void AddTotal(const Timer& other) { | 74 void AddTotal(const Timer& other) { |
76 AtomicOperations::IncrementInt64By(&total_, other.total_); | 75 AtomicOperations::IncrementInt64By(&total_, other.total_); |
77 } | 76 } |
78 | 77 |
79 // Accessors. | 78 // Accessors. |
80 bool report() const { return report_; } | 79 bool report() const { return report_; } |
81 bool running() const { return running_; } | 80 bool running() const { return running_; } |
82 const char* message() const { return message_; } | 81 const char* message() const { return message_; } |
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104 // It is used as follows: | 103 // It is used as follows: |
105 // { | 104 // { |
106 // TimerScope timer(FLAG_name_of_flag, timer, isolate); | 105 // TimerScope timer(FLAG_name_of_flag, timer, isolate); |
107 // ..... | 106 // ..... |
108 // code that needs to be timed. | 107 // code that needs to be timed. |
109 // .... | 108 // .... |
110 // } | 109 // } |
111 class TimerScope : public StackResource { | 110 class TimerScope : public StackResource { |
112 public: | 111 public: |
113 TimerScope(bool flag, Timer* timer, Thread* thread = NULL) | 112 TimerScope(bool flag, Timer* timer, Thread* thread = NULL) |
114 : StackResource(thread), | 113 : StackResource(thread), nested_(false), timer_(flag ? timer : NULL) { |
115 nested_(false), | |
116 timer_(flag ? timer : NULL) { | |
117 Init(); | 114 Init(); |
118 } | 115 } |
119 | 116 |
120 void Init() { | 117 void Init() { |
121 if (timer_ != NULL) { | 118 if (timer_ != NULL) { |
122 if (!timer_->running()) { | 119 if (!timer_->running()) { |
123 timer_->Start(); | 120 timer_->Start(); |
124 } else { | 121 } else { |
125 nested_ = true; | 122 nested_ = true; |
126 } | 123 } |
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139 Timer* const timer_; | 136 Timer* const timer_; |
140 | 137 |
141 DISALLOW_ALLOCATION(); | 138 DISALLOW_ALLOCATION(); |
142 DISALLOW_COPY_AND_ASSIGN(TimerScope); | 139 DISALLOW_COPY_AND_ASSIGN(TimerScope); |
143 }; | 140 }; |
144 | 141 |
145 | 142 |
146 class PauseTimerScope : public StackResource { | 143 class PauseTimerScope : public StackResource { |
147 public: | 144 public: |
148 PauseTimerScope(bool flag, Timer* timer, Thread* thread = NULL) | 145 PauseTimerScope(bool flag, Timer* timer, Thread* thread = NULL) |
149 : StackResource(thread), | 146 : StackResource(thread), nested_(false), timer_(flag ? timer : NULL) { |
150 nested_(false), | |
151 timer_(flag ? timer : NULL) { | |
152 if (timer_) { | 147 if (timer_) { |
153 if (timer_->running()) { | 148 if (timer_->running()) { |
154 timer_->Stop(); | 149 timer_->Stop(); |
155 } else { | 150 } else { |
156 nested_ = true; | 151 nested_ = true; |
157 } | 152 } |
158 } | 153 } |
159 } | 154 } |
160 ~PauseTimerScope() { | 155 ~PauseTimerScope() { |
161 if (timer_) { | 156 if (timer_) { |
162 if (!nested_) { | 157 if (!nested_) { |
163 timer_->Start(); | 158 timer_->Start(); |
164 } | 159 } |
165 } | 160 } |
166 } | 161 } |
167 | 162 |
168 private: | 163 private: |
169 bool nested_; | 164 bool nested_; |
170 Timer* const timer_; | 165 Timer* const timer_; |
171 | 166 |
172 DISALLOW_ALLOCATION(); | 167 DISALLOW_ALLOCATION(); |
173 DISALLOW_COPY_AND_ASSIGN(PauseTimerScope); | 168 DISALLOW_COPY_AND_ASSIGN(PauseTimerScope); |
174 }; | 169 }; |
175 | 170 |
176 | 171 |
177 | |
178 } // namespace dart | 172 } // namespace dart |
179 | 173 |
180 #endif // RUNTIME_VM_TIMER_H_ | 174 #endif // RUNTIME_VM_TIMER_H_ |
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