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83 lines
2.3 KiB
C++
83 lines
2.3 KiB
C++
/*
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* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef SYSTEM_WRAPPERS_INTERFACE_REF_COUNT_H_
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#define SYSTEM_WRAPPERS_INTERFACE_REF_COUNT_H_
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#include "webrtc/system_wrappers/interface/atomic32.h"
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namespace webrtc {
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// This class can be used for instantiating
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// reference counted objects.
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// int32_t AddRef() and int32_t Release().
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// Usage:
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// RefCountImpl<T>* implementation = new RefCountImpl<T>(p);
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//
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// Example:
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// class MyInterface {
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// public:
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// virtual void DoSomething() = 0;
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// virtual int32_t AddRef() = 0;
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// virtual int32_t Release() = 0:
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// private:
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// virtual ~MyInterface(){};
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// }
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// class MyImplementation : public MyInterface {
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// public:
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// virtual DoSomething() { printf("hello"); };
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// };
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// MyImplementation* CreateMyImplementation() {
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// RefCountImpl<MyImplementation>* implementation =
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// new RefCountImpl<MyImplementation>();
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// return implementation;
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// }
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template <class T>
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class RefCountImpl : public T {
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public:
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RefCountImpl() : ref_count_(0) {}
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template<typename P>
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explicit RefCountImpl(P p) : T(p), ref_count_(0) {}
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template<typename P1, typename P2>
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RefCountImpl(P1 p1, P2 p2) : T(p1, p2), ref_count_(0) {}
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template<typename P1, typename P2, typename P3>
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RefCountImpl(P1 p1, P2 p2, P3 p3) : T(p1, p2, p3), ref_count_(0) {}
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template<typename P1, typename P2, typename P3, typename P4>
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RefCountImpl(P1 p1, P2 p2, P3 p3, P4 p4) : T(p1, p2, p3, p4), ref_count_(0) {}
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template<typename P1, typename P2, typename P3, typename P4, typename P5>
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RefCountImpl(P1 p1, P2 p2, P3 p3, P4 p4, P5 p5)
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: T(p1, p2, p3, p4, p5), ref_count_(0) {}
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virtual int32_t AddRef() {
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return ++ref_count_;
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}
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virtual int32_t Release() {
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int32_t ref_count;
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ref_count = --ref_count_;
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if (ref_count == 0)
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delete this;
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return ref_count;
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}
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protected:
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Atomic32 ref_count_;
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};
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} // namespace webrtc
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#endif // SYSTEM_WRAPPERS_INTERFACE_REF_COUNT_H_
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