3c12f4dadb
Reason for revert: Caused static initializers. BUG=chromium:556866 TBR=tommi@webrtc.org Original issue's description: > Create rtc::AtomicInt POD struct. > > Prevents accidental non-atomic reads, increments and stores since > "volatile int" doesn't enforce atomic usage. > > BUG= > R=kwiberg@webrtc.org, tommi@webrtc.org > > Committed: https://crrev.com/b27f590ece487819c3d1fda400315e582fb975b6 > Cr-Commit-Position: refs/heads/master@{#10657} TBR=kwiberg@webrtc.org,tommi@webrtc.org NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true BUG= Review URL: https://codereview.webrtc.org/1453093002 Cr-Commit-Position: refs/heads/master@{#10669}
130 lines
4.0 KiB
C++
130 lines
4.0 KiB
C++
/*
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* Copyright 2011 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 WEBRTC_BASE_REFCOUNT_H_
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#define WEBRTC_BASE_REFCOUNT_H_
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#include <string.h>
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#include "webrtc/base/atomicops.h"
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namespace rtc {
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// Reference count interface.
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class RefCountInterface {
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public:
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virtual int AddRef() const = 0;
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virtual int Release() const = 0;
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protected:
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virtual ~RefCountInterface() {}
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};
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template <class T>
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class RefCountedObject : public T {
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public:
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RefCountedObject() : ref_count_(0) {
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}
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template<typename P>
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explicit RefCountedObject(P p) : T(p), ref_count_(0) {
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}
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template<typename P1, typename P2>
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RefCountedObject(P1 p1, P2 p2) : T(p1, p2), ref_count_(0) {
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}
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template<typename P1, typename P2, typename P3>
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RefCountedObject(P1 p1, P2 p2, P3 p3) : T(p1, p2, p3), ref_count_(0) {
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}
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template<typename P1, typename P2, typename P3, typename P4>
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RefCountedObject(P1 p1, P2 p2, P3 p3, P4 p4)
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: T(p1, p2, p3, p4), ref_count_(0) {
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}
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template<typename P1, typename P2, typename P3, typename P4, typename P5>
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RefCountedObject(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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}
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template<typename P1, typename P2, typename P3, typename P4, typename P5,
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typename P6>
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RefCountedObject(P1 p1, P2 p2, P3 p3, P4 p4, P5 p5, P6 p6)
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: T(p1, p2, p3, p4, p5, p6), ref_count_(0) {
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}
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template<typename P1, typename P2, typename P3, typename P4, typename P5,
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typename P6, typename P7>
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RefCountedObject(P1 p1, P2 p2, P3 p3, P4 p4, P5 p5, P6 p6, P7 p7)
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: T(p1, p2, p3, p4, p5, p6, p7), ref_count_(0) {
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}
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template<typename P1, typename P2, typename P3, typename P4, typename P5,
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typename P6, typename P7, typename P8>
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RefCountedObject(P1 p1, P2 p2, P3 p3, P4 p4, P5 p5, P6 p6, P7 p7, P8 p8)
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: T(p1, p2, p3, p4, p5, p6, p7, p8), ref_count_(0) {
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}
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template<typename P1, typename P2, typename P3, typename P4, typename P5,
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typename P6, typename P7, typename P8, typename P9>
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RefCountedObject(
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P1 p1, P2 p2, P3 p3, P4 p4, P5 p5, P6 p6, P7 p7, P8 p8, P9 p9)
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: T(p1, p2, p3, p4, p5, p6, p7, p8, p9), ref_count_(0) {
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}
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template<typename P1, typename P2, typename P3, typename P4, typename P5,
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typename P6, typename P7, typename P8, typename P9, typename P10>
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RefCountedObject(
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P1 p1, P2 p2, P3 p3, P4 p4, P5 p5, P6 p6, P7 p7, P8 p8, P9 p9, P10 p10)
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: T(p1, p2, p3, p4, p5, p6, p7, p8, p9, p10), ref_count_(0) {
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}
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template<typename P1, typename P2, typename P3, typename P4, typename P5,
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typename P6, typename P7, typename P8, typename P9, typename P10,
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typename P11>
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RefCountedObject(
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P1 p1, P2 p2, P3 p3, P4 p4, P5 p5, P6 p6, P7 p7, P8 p8, P9 p9, P10 p10,
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P11 p11)
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: T(p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11), ref_count_(0) {
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}
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virtual int AddRef() const {
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return AtomicOps::Increment(&ref_count_);
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}
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virtual int Release() const {
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int count = AtomicOps::Decrement(&ref_count_);
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if (!count) {
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delete this;
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}
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return count;
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}
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// Return whether the reference count is one. If the reference count is used
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// in the conventional way, a reference count of 1 implies that the current
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// thread owns the reference and no other thread shares it. This call
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// performs the test for a reference count of one, and performs the memory
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// barrier needed for the owning thread to act on the object, knowing that it
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// has exclusive access to the object.
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virtual bool HasOneRef() const {
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return AtomicOps::AcquireLoad(&ref_count_) == 1;
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}
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protected:
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virtual ~RefCountedObject() {
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}
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mutable volatile int ref_count_;
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};
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} // namespace rtc
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#endif // WEBRTC_BASE_REFCOUNT_H_
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