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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, 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 VM_COMPILER_H_ | 5 #ifndef VM_COMPILER_H_ |
6 #define VM_COMPILER_H_ | 6 #define VM_COMPILER_H_ |
7 | 7 |
8 #include "vm/allocation.h" | 8 #include "vm/allocation.h" |
9 #include "vm/growable_array.h" | 9 #include "vm/growable_array.h" |
10 #include "vm/runtime_entry.h" | 10 #include "vm/runtime_entry.h" |
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105 // Current implementation: one task per isolate, it dies with the owning | 105 // Current implementation: one task per isolate, it dies with the owning |
106 // isolate. | 106 // isolate. |
107 class BackgroundCompiler : public ThreadPool::Task { | 107 class BackgroundCompiler : public ThreadPool::Task { |
108 public: | 108 public: |
109 static void EnsureInit(Isolate* isolate); | 109 static void EnsureInit(Isolate* isolate); |
110 | 110 |
111 static void Stop(BackgroundCompiler* task); | 111 static void Stop(BackgroundCompiler* task); |
112 | 112 |
113 void CompileOptimized(const Function& function); | 113 void CompileOptimized(const Function& function); |
114 | 114 |
| 115 // Access to queue length is guarded with queue_monitor_; |
| 116 intptr_t queue_length() const { return queue_length_; } |
| 117 void set_queue_length(intptr_t value) { queue_length_ = value; } |
| 118 |
115 private: | 119 private: |
116 explicit BackgroundCompiler(Isolate* isolate); | 120 explicit BackgroundCompiler(Isolate* isolate); |
117 | 121 |
118 virtual void Run(); | 122 virtual void Run(); |
119 | 123 |
120 void Add(const Function& f) const; | 124 void Add(const Function& f); |
121 RawFunction* RemoveOrNull() const; | 125 RawFunction* RemoveOrNull(); |
| 126 RawFunction* LastOrNull() const; |
122 | 127 |
123 Isolate* isolate_; | 128 Isolate* isolate_; |
124 bool running_; | 129 bool running_; // While true, will try to read queue and compile. |
125 bool* done_; | 130 bool* done_; // True if the thread is done. |
126 Monitor* monitor_; | 131 Monitor* queue_monitor_; // Controls access to the queue. |
127 Monitor* done_monitor_; | 132 Monitor* done_monitor_; // Notify/wait that the thread is done. |
| 133 |
| 134 intptr_t queue_length_; // Lightweight access to length of compiler queue. |
128 | 135 |
129 DISALLOW_IMPLICIT_CONSTRUCTORS(BackgroundCompiler); | 136 DISALLOW_IMPLICIT_CONSTRUCTORS(BackgroundCompiler); |
130 }; | 137 }; |
131 | 138 |
132 } // namespace dart | 139 } // namespace dart |
133 | 140 |
134 #endif // VM_COMPILER_H_ | 141 #endif // VM_COMPILER_H_ |
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