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Side by Side Diff: webrtc/base/refcountedobject.h

Issue 2877023002: Move webrtc/{base => rtc_base} (Closed)
Patch Set: update presubmit.py and DEPS include rules Created 3 years, 5 months ago
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1 /* 1 /*
2 * Copyright 2016 The WebRTC Project Authors. All rights reserved. 2 * Copyright 2016 The WebRTC Project Authors. All rights reserved.
3 * 3 *
4 * Use of this source code is governed by a BSD-style license 4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source 5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found 6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may 7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree. 8 * be found in the AUTHORS file in the root of the source tree.
9 */ 9 */
10 #ifndef WEBRTC_BASE_REFCOUNTEDOBJECT_H_ 10 #ifndef WEBRTC_BASE_REFCOUNTEDOBJECT_H_
11 #define WEBRTC_BASE_REFCOUNTEDOBJECT_H_ 11 #define WEBRTC_BASE_REFCOUNTEDOBJECT_H_
12 12
13 #include <utility>
14 13
15 #include "webrtc/base/atomicops.h" 14 // This header is deprecated and is just left here temporarily during
16 15 // refactoring. See https://bugs.webrtc.org/7634 for more details.
17 namespace rtc { 16 #include "webrtc/rtc_base/refcountedobject.h"
18
19 template <class T>
20 class RefCountedObject : public T {
21 public:
22 RefCountedObject() {}
23
24 template <class P0>
25 explicit RefCountedObject(P0&& p0) : T(std::forward<P0>(p0)) {}
26
27 template <class P0, class P1, class... Args>
28 RefCountedObject(P0&& p0, P1&& p1, Args&&... args)
29 : T(std::forward<P0>(p0),
30 std::forward<P1>(p1),
31 std::forward<Args>(args)...) {}
32
33 virtual int AddRef() const { return AtomicOps::Increment(&ref_count_); }
34
35 virtual int Release() const {
36 int count = AtomicOps::Decrement(&ref_count_);
37 if (!count) {
38 delete this;
39 }
40 return count;
41 }
42
43 // Return whether the reference count is one. If the reference count is used
44 // in the conventional way, a reference count of 1 implies that the current
45 // thread owns the reference and no other thread shares it. This call
46 // performs the test for a reference count of one, and performs the memory
47 // barrier needed for the owning thread to act on the object, knowing that it
48 // has exclusive access to the object.
49 virtual bool HasOneRef() const {
50 return AtomicOps::AcquireLoad(&ref_count_) == 1;
51 }
52
53 protected:
54 virtual ~RefCountedObject() {}
55
56 mutable volatile int ref_count_ = 0;
57 };
58
59 } // namespace rtc
60 17
61 #endif // WEBRTC_BASE_REFCOUNTEDOBJECT_H_ 18 #endif // WEBRTC_BASE_REFCOUNTEDOBJECT_H_
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