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| 1 /* |
| 2 * Copyright (C) 2013, Google Inc. All rights reserved. |
| 3 * |
| 4 * Redistribution and use in source and binary forms, with or without |
| 5 * modification, are permitted provided that the following conditions |
| 6 * are met: |
| 7 * 1. Redistributions of source code must retain the above copyright |
| 8 * notice, this list of conditions and the following disclaimer. |
| 9 * 2. Redistributions in binary form must reproduce the above copyright |
| 10 * notice, this list of conditions and the following disclaimer in the |
| 11 * documentation and/or other materials provided with the distribution. |
| 12 * |
| 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND AN
Y |
| 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| 15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 16 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR AN
Y |
| 17 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| 18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND O
N |
| 20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 23 */ |
| 24 |
| 25 #ifndef ThenableCoercions_h |
| 26 #define ThenableCoercions_h |
| 27 |
| 28 #include "bindings/v8/ScopedPersistent.h" |
| 29 #include "wtf/Assertions.h" |
| 30 #include "wtf/DoublyLinkedList.h" |
| 31 #include "wtf/Noncopyable.h" |
| 32 #include "wtf/PassOwnPtr.h" |
| 33 #include "wtf/Vector.h" |
| 34 |
| 35 #include <v8.h> |
| 36 |
| 37 namespace WebCore { |
| 38 |
| 39 class ThenableCoercions { |
| 40 WTF_MAKE_NONCOPYABLE(ThenableCoercions); |
| 41 public: |
| 42 static PassOwnPtr<ThenableCoercions> create(); |
| 43 |
| 44 ~ThenableCoercions(); |
| 45 |
| 46 bool has(v8::Handle<v8::Object> thenable); |
| 47 v8::Handle<v8::Object> get(v8::Handle<v8::Object> thenable); |
| 48 void set(v8::Handle<v8::Object> thenable, v8::Handle<v8::Object> promise, v8
::Isolate*); |
| 49 |
| 50 private: |
| 51 ThenableCoercions(); |
| 52 |
| 53 class Entry : public DoublyLinkedListNode<Entry> { |
| 54 WTF_MAKE_NONCOPYABLE(Entry); |
| 55 friend class DoublyLinkedListNode<Entry>; |
| 56 public: |
| 57 static Entry* create(v8::Handle<v8::Object> thenable, v8::Handle<v8::Obj
ect> promise, ThenableCoercions* thenableCoercions, v8::Isolate* isolate) |
| 58 { |
| 59 return new Entry(thenable, promise, thenableCoercions, isolate); |
| 60 } |
| 61 |
| 62 v8::Local<v8::Object> thenable() |
| 63 { |
| 64 return m_thenable.newLocal(m_isolate); |
| 65 } |
| 66 |
| 67 v8::Local<v8::Object> promise() |
| 68 { |
| 69 return m_promise.newLocal(m_isolate); |
| 70 } |
| 71 |
| 72 private: |
| 73 Entry(v8::Handle<v8::Object> thenable, v8::Handle<v8::Object> promise, T
henableCoercions*, v8::Isolate*); |
| 74 |
| 75 static void makeWeakCallback(v8::Isolate*, v8::Persistent<v8::Object>* t
henable, Entry*); |
| 76 |
| 77 Entry* m_next; |
| 78 Entry* m_prev; |
| 79 ScopedPersistent<v8::Object> m_thenable; |
| 80 ScopedPersistent<v8::Object> m_promise; |
| 81 ThenableCoercions* m_thenableCoercions; |
| 82 v8::Isolate* m_isolate; |
| 83 }; |
| 84 |
| 85 class GuardEntriesListAgainstGC { |
| 86 WTF_MAKE_NONCOPYABLE(GuardEntriesListAgainstGC); |
| 87 public: |
| 88 GuardEntriesListAgainstGC(ThenableCoercions*); |
| 89 ~GuardEntriesListAgainstGC(); |
| 90 |
| 91 private: |
| 92 ThenableCoercions* m_thenableCoercions; |
| 93 }; |
| 94 |
| 95 friend class Entry; |
| 96 friend class GuardEntriesListAgainstGC; |
| 97 |
| 98 void tryToDelete(Entry*); |
| 99 void deleteInternal(Entry*); |
| 100 |
| 101 DoublyLinkedList<Entry> m_entries; |
| 102 Vector<Entry*> m_entriesToDelete; |
| 103 bool m_entriesListGuarded : 1; |
| 104 }; |
| 105 |
| 106 } // namespace WebCore |
| 107 |
| 108 #endif // ThenableCoercions_h |
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