system_wrappers: rename interface -> include

webrtc/system_wrappers/interface/ref_count.h

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