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 SharedPersistent_h 32 #define SharedPersistent_h 33 34 #include "bindings/v8/ScopedPersistent.h" 35 #include <v8.h> 36 #include "wtf/PassRefPtr.h" 37 #include "wtf/RefCounted.h" 38 39 namespace WebCore { 40 41 template <typename T> 42 class SharedPersistent : public RefCounted<SharedPersistent<T> > { 43 WTF_MAKE_NONCOPYABLE(SharedPersistent); 44 public: 45 static PassRefPtr<SharedPersistent<T> > create(v8::Handle<T> value, v8::Isolate* isolate) 46 { 47 return adoptRef(new SharedPersistent<T>(value, isolate)); 48 } 49 50 v8::Local<T> newLocal(v8::Isolate* isolate) const 51 { 52 return m_value.newLocal(isolate); 53 } 54 55 bool isEmpty() { return m_value.isEmpty(); } 56 57 bool operator==(const SharedPersistent<T>& other) 58 { 59 return m_value == other.m_value; 60 } 61 62 private: 63 explicit SharedPersistent(v8::Handle<T> value, v8::Isolate* isolate) : m_value(isolate, value) { } 64 ScopedPersistent<T> m_value; 65 }; 66 67 } // namespace WebCore 68 69 #endif // SharedPersistent_h 70
