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/*
* Copyright 2011 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 WEBRTC_BASE_REFCOUNT_H_
#define WEBRTC_BASE_REFCOUNT_H_
#include <string.h>
#include "webrtc/base/atomicops.h"
namespace rtc {
// Reference count interface.
class RefCountInterface {
public:
virtual int AddRef() const = 0;
virtual int Release() const = 0;
protected:
virtual ~RefCountInterface() {}
};
template <class T>
class RefCountedObject : public T {
public:
RefCountedObject() : ref_count_(0) {
}
template<typename P>
explicit RefCountedObject(P p) : T(p), ref_count_(0) {
}
template<typename P1, typename P2>
RefCountedObject(P1 p1, P2 p2) : T(p1, p2), ref_count_(0) {
}
template<typename P1, typename P2, typename P3>
RefCountedObject(P1 p1, P2 p2, P3 p3) : T(p1, p2, p3), ref_count_(0) {
}
template<typename P1, typename P2, typename P3, typename P4>
RefCountedObject(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>
RefCountedObject(P1 p1, P2 p2, P3 p3, P4 p4, P5 p5)
: T(p1, p2, p3, p4, p5), ref_count_(0) {
}
template<typename P1, typename P2, typename P3, typename P4, typename P5,
typename P6>
RefCountedObject(P1 p1, P2 p2, P3 p3, P4 p4, P5 p5, P6 p6)
: T(p1, p2, p3, p4, p5, p6), ref_count_(0) {
}
template<typename P1, typename P2, typename P3, typename P4, typename P5,
typename P6, typename P7>
RefCountedObject(P1 p1, P2 p2, P3 p3, P4 p4, P5 p5, P6 p6, P7 p7)
: T(p1, p2, p3, p4, p5, p6, p7), ref_count_(0) {
}
template<typename P1, typename P2, typename P3, typename P4, typename P5,
typename P6, typename P7, typename P8>
RefCountedObject(P1 p1, P2 p2, P3 p3, P4 p4, P5 p5, P6 p6, P7 p7, P8 p8)
: T(p1, p2, p3, p4, p5, p6, p7, p8), ref_count_(0) {
}
template<typename P1, typename P2, typename P3, typename P4, typename P5,
typename P6, typename P7, typename P8, typename P9>
RefCountedObject(
P1 p1, P2 p2, P3 p3, P4 p4, P5 p5, P6 p6, P7 p7, P8 p8, P9 p9)
: T(p1, p2, p3, p4, p5, p6, p7, p8, p9), ref_count_(0) {
}
template<typename P1, typename P2, typename P3, typename P4, typename P5,
typename P6, typename P7, typename P8, typename P9, typename P10>
RefCountedObject(
P1 p1, P2 p2, P3 p3, P4 p4, P5 p5, P6 p6, P7 p7, P8 p8, P9 p9, P10 p10)
: T(p1, p2, p3, p4, p5, p6, p7, p8, p9, p10), ref_count_(0) {
}
template<typename P1, typename P2, typename P3, typename P4, typename P5,
typename P6, typename P7, typename P8, typename P9, typename P10,
typename P11>
RefCountedObject(
P1 p1, P2 p2, P3 p3, P4 p4, P5 p5, P6 p6, P7 p7, P8 p8, P9 p9, P10 p10,
P11 p11)
: T(p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11), ref_count_(0) {
}
virtual int AddRef() const {
return AtomicOps::Increment(&ref_count_);
}
virtual int Release() const {
int count = AtomicOps::Decrement(&ref_count_);
if (!count) {
delete this;
}
return count;
}
// Return whether the reference count is one. If the reference count is used
// in the conventional way, a reference count of 1 implies that the current
// thread owns the reference and no other thread shares it. This call
// performs the test for a reference count of one, and performs the memory
// barrier needed for the owning thread to act on the object, knowing that it
// has exclusive access to the object.
virtual bool HasOneRef() const {
return AtomicOps::AcquireLoad(&ref_count_) == 1;
}
protected:
virtual ~RefCountedObject() {
}
mutable volatile int ref_count_;
};
} // namespace rtc
#endif // WEBRTC_BASE_REFCOUNT_H_