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1 /* | 1 /* |
2 * Copyright (C) 2009, 2012 Google Inc. All rights reserved. | 2 * Copyright (C) 2009, 2012 Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
6 * met: | 6 * met: |
7 * | 7 * |
8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
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35 #include "bindings/v8/V8Binding.h" | 35 #include "bindings/v8/V8Binding.h" |
36 #include <v8.h> | 36 #include <v8.h> |
37 #include "wtf/OwnPtr.h" | 37 #include "wtf/OwnPtr.h" |
38 #include "wtf/Threading.h" | 38 #include "wtf/Threading.h" |
39 #include "wtf/text/TextPosition.h" | 39 #include "wtf/text/TextPosition.h" |
40 | 40 |
41 namespace WebCore { | 41 namespace WebCore { |
42 | 42 |
43 class ScriptSourceCode; | 43 class ScriptSourceCode; |
44 class ScriptValue; | 44 class ScriptValue; |
45 class WorkerContext; | 45 class WorkerGlobalScope; |
46 | 46 |
47 struct WorkerContextExecutionState { | 47 struct WorkerGlobalScopeExecutionState { |
48 WorkerContextExecutionState() | 48 WorkerGlobalScopeExecutionState() |
49 : hadException(false) | 49 : hadException(false) |
50 , lineNumber(0) | 50 , lineNumber(0) |
51 { | 51 { |
52 } | 52 } |
53 | 53 |
54 bool hadException; | 54 bool hadException; |
55 ScriptValue exception; | 55 ScriptValue exception; |
56 String errorMessage; | 56 String errorMessage; |
57 int lineNumber; | 57 int lineNumber; |
58 String sourceURL; | 58 String sourceURL; |
59 }; | 59 }; |
60 | 60 |
61 class WorkerScriptController { | 61 class WorkerScriptController { |
62 public: | 62 public: |
63 WorkerScriptController(WorkerContext*); | 63 WorkerScriptController(WorkerGlobalScope*); |
64 ~WorkerScriptController(); | 64 ~WorkerScriptController(); |
65 | 65 |
66 WorkerContext* workerContext() { return m_workerContext; } | 66 WorkerGlobalScope* workerGlobalScope() { return m_workerGlobalScope; } |
67 | 67 |
68 void evaluate(const ScriptSourceCode&, ScriptValue* = 0); | 68 void evaluate(const ScriptSourceCode&, ScriptValue* = 0); |
69 | 69 |
70 void setException(const ScriptValue&); | 70 void setException(const ScriptValue&); |
71 | 71 |
72 // Async request to terminate a future JS execution. Eventually causes t
ermination | 72 // Async request to terminate a future JS execution. Eventually causes t
ermination |
73 // exception raised during JS execution, if the worker thread happens to
run JS. | 73 // exception raised during JS execution, if the worker thread happens to
run JS. |
74 // After JS execution was terminated in this way, the Worker thread has
to use | 74 // After JS execution was terminated in this way, the Worker thread has
to use |
75 // forbidExecution()/isExecutionForbidden() to guard against reentry int
o JS. | 75 // forbidExecution()/isExecutionForbidden() to guard against reentry int
o JS. |
76 // Can be called from any thread. | 76 // Can be called from any thread. |
77 void scheduleExecutionTermination(); | 77 void scheduleExecutionTermination(); |
78 bool isExecutionTerminating() const; | 78 bool isExecutionTerminating() const; |
79 | 79 |
80 // Called on Worker thread when JS exits with termination exception caus
ed by forbidExecution() request, | 80 // Called on Worker thread when JS exits with termination exception caus
ed by forbidExecution() request, |
81 // or by Worker thread termination code to prevent future entry into JS. | 81 // or by Worker thread termination code to prevent future entry into JS. |
82 void forbidExecution(); | 82 void forbidExecution(); |
83 bool isExecutionForbidden() const; | 83 bool isExecutionForbidden() const; |
84 | 84 |
85 void disableEval(const String&); | 85 void disableEval(const String&); |
86 | 86 |
87 // Returns WorkerScriptController for the currently executing context. 0
will be returned if the current executing context is not the worker context. | 87 // Returns WorkerScriptController for the currently executing context. 0
will be returned if the current executing context is not the worker context. |
88 static WorkerScriptController* controllerForContext(); | 88 static WorkerScriptController* controllerForContext(); |
89 | 89 |
90 // Evaluate a script file in the current execution environment. | 90 // Evaluate a script file in the current execution environment. |
91 ScriptValue evaluate(const String& script, const String& fileName, const
TextPosition& scriptStartPosition, WorkerContextExecutionState*); | 91 ScriptValue evaluate(const String& script, const String& fileName, const
TextPosition& scriptStartPosition, WorkerGlobalScopeExecutionState*); |
92 | 92 |
93 // Returns a local handle of the context. | 93 // Returns a local handle of the context. |
94 v8::Local<v8::Context> context() { return m_context.newLocal(v8::Isolate
::GetCurrent()); } | 94 v8::Local<v8::Context> context() { return m_context.newLocal(v8::Isolate
::GetCurrent()); } |
95 | 95 |
96 // Send a notification about current thread is going to be idle. | 96 // Send a notification about current thread is going to be idle. |
97 // hint suggests the upcoming idleness interval duration. | 97 // hint suggests the upcoming idleness interval duration. |
98 // The return value of true means that the script engine has done | 98 // The return value of true means that the script engine has done |
99 // most of the work and there's no need to call it again for a while. | 99 // most of the work and there's no need to call it again for a while. |
100 bool idleNotification(int hint = 1000) { return v8::V8::IdleNotification
(hint); } | 100 bool idleNotification(int hint = 1000) { return v8::V8::IdleNotification
(hint); } |
101 | 101 |
102 private: | 102 private: |
103 bool initializeContextIfNeeded(); | 103 bool initializeContextIfNeeded(); |
104 void disposeContext(); | 104 void disposeContext(); |
105 | 105 |
106 WorkerContext* m_workerContext; | 106 WorkerGlobalScope* m_workerGlobalScope; |
107 v8::Isolate* m_isolate; | 107 v8::Isolate* m_isolate; |
108 ScopedPersistent<v8::Context> m_context; | 108 ScopedPersistent<v8::Context> m_context; |
109 OwnPtr<V8PerContextData> m_perContextData; | 109 OwnPtr<V8PerContextData> m_perContextData; |
110 String m_disableEvalPending; | 110 String m_disableEvalPending; |
111 OwnPtr<DOMDataStore> m_domDataStore; | 111 OwnPtr<DOMDataStore> m_domDataStore; |
112 bool m_executionForbidden; | 112 bool m_executionForbidden; |
113 bool m_executionScheduledToTerminate; | 113 bool m_executionScheduledToTerminate; |
114 mutable Mutex m_scheduledTerminationMutex; | 114 mutable Mutex m_scheduledTerminationMutex; |
115 }; | 115 }; |
116 | 116 |
117 } // namespace WebCore | 117 } // namespace WebCore |
118 | 118 |
119 #endif // WorkerScriptController_h | 119 #endif // WorkerScriptController_h |
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