1 /* 2 * Copyright (C) 2010 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 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 17 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef WebPrivateOwnPtr_h 27 #define WebPrivateOwnPtr_h 28 29 #include "WebCommon.h" 30 31 namespace WebKit { 32 33 // This class is an implementation detail of the WebKit API. It exists 34 // to help simplify the implementation of WebKit interfaces that merely 35 // wrap a pointer to a WebCore class. It's similar to WebPrivatePtr, but it 36 // wraps a naked pointer rather than a reference counted. 37 // Note: you must call reset(0) on the implementation side in order to delete 38 // the WebCore pointer. 39 template <typename T> 40 class WebPrivateOwnPtr { 41 public: 42 WebPrivateOwnPtr() : m_ptr(0) {} 43 ~WebPrivateOwnPtr() { WEBKIT_ASSERT(!m_ptr); } 44 45 #if WEBKIT_IMPLEMENTATION 46 explicit WebPrivateOwnPtr(T* ptr) 47 : m_ptr(ptr) 48 { 49 } 50 51 void reset(T* ptr) 52 { 53 delete m_ptr; 54 m_ptr = ptr; 55 } 56 57 T* get() const { return m_ptr; } 58 59 T* operator->() const 60 { 61 WEBKIT_ASSERT(m_ptr); 62 return m_ptr; 63 } 64 #endif // WEBKIT_IMPLEMENTATION 65 66 private: 67 T* m_ptr; 68 69 WebPrivateOwnPtr(const WebPrivateOwnPtr&); 70 void operator=(const WebPrivateOwnPtr&); 71 }; 72 73 } // namespace WebKit 74 75 #endif 76
