1 /* 2 * libjingle 3 * Copyright 2011, Google Inc. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #ifndef TALK_APP_BASE_REFCOUNT_H_ 29 #define TALK_APP_BASE_REFCOUNT_H_ 30 31 #include <string.h> 32 33 #include "talk/base/criticalsection.h" 34 35 namespace talk_base { 36 37 // Reference count interface. 38 class RefCountInterface { 39 public: 40 virtual int AddRef() = 0; 41 virtual int Release() = 0; 42 protected: ~RefCountInterface()43 virtual ~RefCountInterface() {} 44 }; 45 46 template <class T> 47 class RefCountedObject : public T { 48 public: RefCountedObject()49 RefCountedObject() : ref_count_(0) { 50 } 51 52 template<typename P> RefCountedObject(P p)53 explicit RefCountedObject(P p) : T(p), ref_count_(0) { 54 } 55 56 template<typename P1, typename P2> RefCountedObject(P1 p1,P2 p2)57 RefCountedObject(P1 p1, P2 p2) : T(p1, p2), ref_count_(0) { 58 } 59 60 template<typename P1, typename P2, typename P3> RefCountedObject(P1 p1,P2 p2,P3 p3)61 RefCountedObject(P1 p1, P2 p2, P3 p3) : T(p1, p2, p3), ref_count_(0) { 62 } 63 64 template<typename P1, typename P2, typename P3, typename P4> RefCountedObject(P1 p1,P2 p2,P3 p3,P4 p4)65 RefCountedObject(P1 p1, P2 p2, P3 p3, P4 p4) 66 : T(p1, p2, p3, p4), ref_count_(0) { 67 } 68 69 template<typename P1, typename P2, typename P3, typename P4, typename P5> RefCountedObject(P1 p1,P2 p2,P3 p3,P4 p4,P5 p5)70 RefCountedObject(P1 p1, P2 p2, P3 p3, P4 p4, P5 p5) 71 : T(p1, p2, p3, p4, p5), ref_count_(0) { 72 } 73 AddRef()74 virtual int AddRef() { 75 return talk_base::AtomicOps::Increment(&ref_count_); 76 } 77 Release()78 virtual int Release() { 79 int count = talk_base::AtomicOps::Decrement(&ref_count_); 80 if (!count) { 81 delete this; 82 } 83 return count; 84 } 85 86 protected: ~RefCountedObject()87 virtual ~RefCountedObject() { 88 } 89 90 int ref_count_; 91 }; 92 93 } // namespace talk_base 94 95 #endif // TALK_APP_BASE_REFCOUNT_H_ 96