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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 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 ScriptPromiseResolver_h | 5 #ifndef ScriptPromiseResolver_h |
| 6 #define ScriptPromiseResolver_h | 6 #define ScriptPromiseResolver_h |
| 7 | 7 |
| 8 #include "bindings/core/v8/ScopedPersistent.h" | 8 #include "bindings/core/v8/ScopedPersistent.h" |
| 9 #include "bindings/core/v8/ScriptPromise.h" | 9 #include "bindings/core/v8/ScriptPromise.h" |
| 10 #include "bindings/core/v8/ScriptState.h" | 10 #include "bindings/core/v8/ScriptState.h" |
| 11 #include "bindings/core/v8/ToV8.h" | 11 #include "bindings/core/v8/ToV8.h" |
| 12 #include "core/CoreExport.h" | 12 #include "core/CoreExport.h" |
| 13 #include "core/dom/ActiveDOMObject.h" | |
| 14 #include "core/dom/ExecutionContext.h" | 13 #include "core/dom/ExecutionContext.h" |
| 14 #include "core/dom/SuspendableObject.h" |
| 15 #include "platform/ScriptForbiddenScope.h" | 15 #include "platform/ScriptForbiddenScope.h" |
| 16 #include "platform/Timer.h" | 16 #include "platform/Timer.h" |
| 17 #include "platform/heap/Handle.h" | 17 #include "platform/heap/Handle.h" |
| 18 #include "platform/heap/SelfKeepAlive.h" | 18 #include "platform/heap/SelfKeepAlive.h" |
| 19 #include <v8.h> | 19 #include <v8.h> |
| 20 | 20 |
| 21 namespace blink { | 21 namespace blink { |
| 22 | 22 |
| 23 // This class wraps v8::Promise::Resolver and provides the following | 23 // This class wraps v8::Promise::Resolver and provides the following |
| 24 // functionalities. | 24 // functionalities. |
| 25 // - A ScriptPromiseResolver retains a ScriptState. A caller | 25 // - A ScriptPromiseResolver retains a ScriptState. A caller |
| 26 // can call resolve or reject from outside of a V8 context. | 26 // can call resolve or reject from outside of a V8 context. |
| 27 // - This class is an ActiveDOMObject and keeps track of the associated | 27 // - This class is an SuspendableObject and keeps track of the associated |
| 28 // ExecutionContext state. When the ExecutionContext is suspended, | 28 // ExecutionContext state. When the ExecutionContext is suspended, |
| 29 // resolve or reject will be delayed. When it is stopped, resolve or reject | 29 // resolve or reject will be delayed. When it is stopped, resolve or reject |
| 30 // will be ignored. | 30 // will be ignored. |
| 31 class CORE_EXPORT ScriptPromiseResolver | 31 class CORE_EXPORT ScriptPromiseResolver |
| 32 : public GarbageCollectedFinalized<ScriptPromiseResolver>, | 32 : public GarbageCollectedFinalized<ScriptPromiseResolver>, |
| 33 public ActiveDOMObject { | 33 public SuspendableObject { |
| 34 USING_GARBAGE_COLLECTED_MIXIN(ScriptPromiseResolver); | 34 USING_GARBAGE_COLLECTED_MIXIN(ScriptPromiseResolver); |
| 35 WTF_MAKE_NONCOPYABLE(ScriptPromiseResolver); | 35 WTF_MAKE_NONCOPYABLE(ScriptPromiseResolver); |
| 36 | 36 |
| 37 public: | 37 public: |
| 38 static ScriptPromiseResolver* create(ScriptState* scriptState) { | 38 static ScriptPromiseResolver* create(ScriptState* scriptState) { |
| 39 ScriptPromiseResolver* resolver = new ScriptPromiseResolver(scriptState); | 39 ScriptPromiseResolver* resolver = new ScriptPromiseResolver(scriptState); |
| 40 resolver->suspendIfNeeded(); | 40 resolver->suspendIfNeeded(); |
| 41 return resolver; | 41 return resolver; |
| 42 } | 42 } |
| 43 | 43 |
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| 79 // reject is called. | 79 // reject is called. |
| 80 ScriptPromise promise() { | 80 ScriptPromise promise() { |
| 81 #if ENABLE(ASSERT) | 81 #if ENABLE(ASSERT) |
| 82 m_isPromiseCalled = true; | 82 m_isPromiseCalled = true; |
| 83 #endif | 83 #endif |
| 84 return m_resolver.promise(); | 84 return m_resolver.promise(); |
| 85 } | 85 } |
| 86 | 86 |
| 87 ScriptState* getScriptState() const { return m_scriptState.get(); } | 87 ScriptState* getScriptState() const { return m_scriptState.get(); } |
| 88 | 88 |
| 89 // ActiveDOMObject implementation. | 89 // SuspendableObject implementation. |
| 90 void suspend() override; | 90 void suspend() override; |
| 91 void resume() override; | 91 void resume() override; |
| 92 void contextDestroyed() override { detach(); } | 92 void contextDestroyed() override { detach(); } |
| 93 | 93 |
| 94 // Calling this function makes the resolver release its internal resources. | 94 // Calling this function makes the resolver release its internal resources. |
| 95 // That means the associated promise will never be resolved or rejected | 95 // That means the associated promise will never be resolved or rejected |
| 96 // unless it's already been resolved or rejected. | 96 // unless it's already been resolved or rejected. |
| 97 // Do not call this function unless you truly need the behavior. | 97 // Do not call this function unless you truly need the behavior. |
| 98 void detach(); | 98 void detach(); |
| 99 | 99 |
| 100 // Once this function is called this resolver stays alive while the | 100 // Once this function is called this resolver stays alive while the |
| 101 // promise is pending and the associated ExecutionContext isn't stopped. | 101 // promise is pending and the associated ExecutionContext isn't stopped. |
| 102 void keepAliveWhilePending(); | 102 void keepAliveWhilePending(); |
| 103 | 103 |
| 104 DECLARE_VIRTUAL_TRACE(); | 104 DECLARE_VIRTUAL_TRACE(); |
| 105 | 105 |
| 106 protected: | 106 protected: |
| 107 // You need to call suspendIfNeeded after the construction because | 107 // You need to call suspendIfNeeded after the construction because |
| 108 // this is an ActiveDOMObject. | 108 // this is an SuspendableObject. |
| 109 explicit ScriptPromiseResolver(ScriptState*); | 109 explicit ScriptPromiseResolver(ScriptState*); |
| 110 | 110 |
| 111 private: | 111 private: |
| 112 typedef ScriptPromise::InternalResolver Resolver; | 112 typedef ScriptPromise::InternalResolver Resolver; |
| 113 enum ResolutionState { | 113 enum ResolutionState { |
| 114 Pending, | 114 Pending, |
| 115 Resolving, | 115 Resolving, |
| 116 Rejecting, | 116 Rejecting, |
| 117 Detached, | 117 Detached, |
| 118 }; | 118 }; |
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| 163 | 163 |
| 164 #if ENABLE(ASSERT) | 164 #if ENABLE(ASSERT) |
| 165 // True if promise() is called. | 165 // True if promise() is called. |
| 166 bool m_isPromiseCalled; | 166 bool m_isPromiseCalled; |
| 167 #endif | 167 #endif |
| 168 }; | 168 }; |
| 169 | 169 |
| 170 } // namespace blink | 170 } // namespace blink |
| 171 | 171 |
| 172 #endif // ScriptPromiseResolver_h | 172 #endif // ScriptPromiseResolver_h |
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