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e0fd75b5ab
This caused us to lose our gn check certification. :( Turns out gn check was just ignoring all the header paths it didn't understand and so gn check passing for sky wasn't meaning much. I tried to straighten out some of the mess in this CL, but its going to take several more rounds of massaging before gn check passes again. On the bright side (almost) all of our headers are absolute now. Turns out my script (attached to the bug) didn't notice ../ includes but I'll fix that in the next patch. R=abarth@chromium.org BUG=435361 Review URL: https://codereview.chromium.org/746023002
100 lines
3.0 KiB
C++
100 lines
3.0 KiB
C++
/*
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* Copyright (C) 2007, 2008, 2010 Apple Inc. All rights reserved.
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* Copyright (C) 2007 Justin Haygood (jhaygood@reaktix.com)
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef ThreadSafeRefCounted_h
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#define ThreadSafeRefCounted_h
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#include "sky/engine/wtf/Atomics.h"
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#include "sky/engine/wtf/DynamicAnnotations.h"
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#include "sky/engine/wtf/FastAllocBase.h"
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#include "sky/engine/wtf/Noncopyable.h"
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#include "sky/engine/wtf/WTFExport.h"
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namespace WTF {
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class WTF_EXPORT ThreadSafeRefCountedBase {
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WTF_MAKE_NONCOPYABLE(ThreadSafeRefCountedBase);
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WTF_MAKE_FAST_ALLOCATED;
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public:
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ThreadSafeRefCountedBase(int initialRefCount = 1)
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: m_refCount(initialRefCount)
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{
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}
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void ref()
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{
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atomicIncrement(&m_refCount);
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}
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bool hasOneRef()
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{
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return refCount() == 1;
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}
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int refCount() const
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{
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return static_cast<int const volatile &>(m_refCount);
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}
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protected:
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// Returns whether the pointer should be freed or not.
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bool derefBase()
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{
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WTF_ANNOTATE_HAPPENS_BEFORE(&m_refCount);
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if (atomicDecrement(&m_refCount) <= 0) {
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WTF_ANNOTATE_HAPPENS_AFTER(&m_refCount);
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return true;
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}
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return false;
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}
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private:
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int m_refCount;
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};
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template<class T> class ThreadSafeRefCounted : public ThreadSafeRefCountedBase {
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public:
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void deref()
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{
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if (derefBase())
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delete static_cast<T*>(this);
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}
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protected:
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ThreadSafeRefCounted()
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{
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}
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};
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} // namespace WTF
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using WTF::ThreadSafeRefCounted;
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#endif // ThreadSafeRefCounted_h
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