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https://github.com/mii443/rust-openvr.git
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112 lines
2.8 KiB
C++
112 lines
2.8 KiB
C++
/************************************************************************************
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Filename : OVR_RefCount.cpp
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Content : Reference counting implementation
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Created : September 19, 2012
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Notes :
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Copyright : Copyright 2014 Oculus VR, Inc. All Rights reserved.
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Licensed under the Oculus VR Rift SDK License Version 3.1 (the "License");
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you may not use the Oculus VR Rift SDK except in compliance with the License,
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which is provided at the time of installation or download, or which
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otherwise accompanies this software in either electronic or hard copy form.
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You may obtain a copy of the License at
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http://www.oculusvr.com/licenses/LICENSE-3.1
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Unless required by applicable law or agreed to in writing, the Oculus VR SDK
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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************************************************************************************/
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#include "OVR_RefCount.h"
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#include "OVR_Atomic.h"
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#include "OVR_Log.h"
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namespace OVR {
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#ifdef OVR_CC_ARM
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void* ReturnArg0(void* p)
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{
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return p;
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}
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#endif
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// ***** Reference Count Base implementation
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RefCountImplCore::~RefCountImplCore()
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{
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// RefCount can be either 1 or 0 here.
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// 0 if Release() was properly called.
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// 1 if the object was declared on stack or as an aggregate.
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OVR_ASSERT(RefCount <= 1);
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}
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#ifdef OVR_BUILD_DEBUG
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void RefCountImplCore::reportInvalidDelete(void *pmem)
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{
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OVR_DEBUG_LOG(
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("Invalid delete call on ref-counted object at %p. Please use Release()", pmem));
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OVR_ASSERT(0);
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}
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#endif
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RefCountNTSImplCore::~RefCountNTSImplCore()
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{
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// RefCount can be either 1 or 0 here.
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// 0 if Release() was properly called.
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// 1 if the object was declared on stack or as an aggregate.
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OVR_ASSERT(RefCount <= 1);
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}
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#ifdef OVR_BUILD_DEBUG
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void RefCountNTSImplCore::reportInvalidDelete(void *pmem)
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{
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OVR_DEBUG_LOG(
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("Invalid delete call on ref-counted object at %p. Please use Release()", pmem));
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OVR_ASSERT(0);
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}
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#endif
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// *** Thread-Safe RefCountImpl
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void RefCountImpl::AddRef()
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{
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AtomicOps<int>::ExchangeAdd_NoSync(&RefCount, 1);
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}
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void RefCountImpl::Release()
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{
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if ((AtomicOps<int>::ExchangeAdd_NoSync(&RefCount, -1) - 1) == 0)
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delete this;
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}
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// *** Thread-Safe RefCountVImpl w/virtual AddRef/Release
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void RefCountVImpl::AddRef()
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{
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AtomicOps<int>::ExchangeAdd_NoSync(&RefCount, 1);
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}
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void RefCountVImpl::Release()
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{
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if ((AtomicOps<int>::ExchangeAdd_NoSync(&RefCount, -1) - 1) == 0)
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delete this;
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}
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// *** NON-Thread-Safe RefCountImpl
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void RefCountNTSImpl::Release() const
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{
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RefCount--;
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if (RefCount == 0)
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delete this;
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}
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} // OVR
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