0489e498eb
The main reason for doing this is to allow refcounted objects to accept rvalue references in ctor and be able to std::move ctor rvalue arguments. Also, refcounted.h is now generated using pump.py instead of manually creating each ctor version. BUG= none Review-Url: https://codereview.webrtc.org/2425683003 Cr-Commit-Position: refs/heads/master@{#14687}
65 lines
1.8 KiB
Plaintext
65 lines
1.8 KiB
Plaintext
/*
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* Copyright 2016 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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// To generate refcount.h from refcount.h.pump, execute:
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// ./testing/gtest/scripts/pump.py ./webrtc/base/refcountedobject.h.pump
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#ifndef WEBRTC_BASE_REFCOUNTEDOBJECT_H_
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#define WEBRTC_BASE_REFCOUNTEDOBJECT_H_
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#include <utility>
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#include "webrtc/base/atomicops.h"
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namespace rtc {
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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() {}
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$range i 0..10
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$for i [[
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$range j 0..i
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template <$for j , [[class P$j]]>
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$if i == 0 [[explicit ]]
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RefCountedObject($for j , [[P$j&& p$j]]) : T($for j , [[std::forward<P$j>(p$j)]]) {}
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]]
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virtual int AddRef() const { return AtomicOps::Increment(&ref_count_); }
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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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mutable volatile int ref_count_ = 0;
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};
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} // namespace rtc
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#endif // WEBRTC_BASE_REFCOUNTEDOBJECT_H_
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