1/* 2 * Copyright (C) 2014 Apple 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'' 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 23 * THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#ifndef XPCPtr_h 27#define XPCPtr_h 28 29#include <xpc/xpc.h> 30 31namespace IPC { 32 33struct AdoptXPC { }; 34 35template<typename T> class XPCPtr { 36public: 37 XPCPtr() 38 : m_ptr(nullptr) 39 { 40 } 41 42 XPCPtr(AdoptXPC, T ptr) 43 : m_ptr(ptr) 44 { 45 } 46 47 ~XPCPtr() 48 { 49 if (m_ptr) 50 xpc_release(m_ptr); 51 } 52 53 T get() const { return m_ptr; } 54 55 explicit operator bool() const { return m_ptr; } 56 bool operator!() const { return !m_ptr; } 57 58 XPCPtr(const XPCPtr& other) 59 : m_ptr(other.m_ptr) 60 { 61 if (m_ptr) 62 xpc_retain(m_ptr); 63 } 64 65 XPCPtr(XPCPtr&& other) 66 : m_ptr(other.m_ptr) 67 { 68 other.m_ptr = nullptr; 69 } 70 71 XPCPtr& operator=(const XPCPtr& other) 72 { 73 T optr = other.get(); 74 if (optr) 75 xpc_retain(optr); 76 77 T ptr = m_ptr; 78 m_ptr = optr; 79 80 if (ptr) 81 xpc_release(ptr); 82 83 return *this; 84 } 85 86 XPCPtr& operator=(std::nullptr_t) 87 { 88 if (m_ptr) 89 xpc_release(m_ptr); 90 m_ptr = nullptr; 91 92 return *this; 93 } 94private: 95 T m_ptr; 96}; 97 98template<typename T> inline XPCPtr<T> adoptXPC(T ptr) 99{ 100 return XPCPtr<T>(AdoptXPC { }, ptr); 101} 102 103} // namespace IPC 104 105#endif // XPCPtr_h 106