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1 /* | |
2 * Copyright (C) 2009 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 are | |
6 * met: | |
7 * | |
8 * * Redistributions of source code must retain the above copyright | |
9 * notice, this list of conditions and the following disclaimer. | |
10 * * Redistributions in binary form must reproduce the above | |
11 * copyright notice, this list of conditions and the following disclaimer | |
12 * in the documentation and/or other materials provided with the | |
13 * distribution. | |
14 * * Neither the name of Google Inc. nor the names of its | |
15 * contributors may be used to endorse or promote products derived from | |
16 * this software without specific prior written permission. | |
17 * | |
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
29 */ | |
30 | |
31 #ifndef ScopedPersistent_h | |
32 #define ScopedPersistent_h | |
33 | |
34 #include <v8.h> | |
35 #include "wtf/Noncopyable.h" | |
36 | |
37 namespace WebCore { | |
38 | |
39 template<typename T> | |
40 class ScopedPersistent { | |
41 WTF_MAKE_NONCOPYABLE(ScopedPersistent); | |
42 public: | |
43 ScopedPersistent() { } | |
44 | |
45 ScopedPersistent(v8::Isolate* isolate, v8::Handle<T> handle) | |
46 : m_handle(isolate, handle) | |
47 { | |
48 } | |
49 | |
50 ~ScopedPersistent() | |
51 { | |
52 clear(); | |
53 } | |
54 | |
55 ALWAYS_INLINE v8::Local<T> newLocal(v8::Isolate* isolate) const | |
56 { | |
57 return v8::Local<T>::New(isolate, m_handle); | |
58 } | |
59 | |
60 template<typename P> | |
61 void setWeak(P* parameters, void (*callback)(const v8::WeakCallbackData<T, P
>&)) | |
62 { | |
63 m_handle.SetWeak(parameters, callback); | |
64 } | |
65 | |
66 bool isEmpty() const { return m_handle.IsEmpty(); } | |
67 bool isWeak() const { return m_handle.IsWeak(); } | |
68 | |
69 void set(v8::Isolate* isolate, v8::Handle<T> handle) | |
70 { | |
71 m_handle.Reset(isolate, handle); | |
72 } | |
73 | |
74 // Note: This is clear in the OwnPtr sense, not the v8::Handle sense. | |
75 void clear() | |
76 { | |
77 m_handle.Reset(); | |
78 } | |
79 | |
80 bool operator==(const ScopedPersistent<T>& other) | |
81 { | |
82 return m_handle == other.m_handle; | |
83 } | |
84 | |
85 template <class S> | |
86 bool operator==(const v8::Handle<S> other) const | |
87 { | |
88 return m_handle == other; | |
89 } | |
90 | |
91 private: | |
92 // FIXME: This function does an unsafe handle access. Remove it. | |
93 friend class V8AbstractEventListener; | |
94 friend class V8PerIsolateData; | |
95 ALWAYS_INLINE v8::Persistent<T>& getUnsafe() | |
96 { | |
97 return m_handle; | |
98 } | |
99 | |
100 v8::Persistent<T> m_handle; | |
101 }; | |
102 | |
103 } // namespace WebCore | |
104 | |
105 #endif // ScopedPersistent_h | |
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