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/*
* Copyright 2019-2021 Diligent Graphics LLC
* Copyright 2015-2019 Egor Yusov
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* In no event and under no legal theory, whether in tort (including negligence),
* contract, or otherwise, unless required by applicable law (such as deliberate
* and grossly negligent acts) or agreed to in writing, shall any Contributor be
* liable for any damages, including any direct, indirect, special, incidental,
* or consequential damages of any character arising as a result of this License or
* out of the use or inability to use the software (including but not limited to damages
* for loss of goodwill, work stoppage, computer failure or malfunction, or any and
* all other commercial damages or losses), even if such Contributor has been advised
* of the possibility of such damages.
*/
#pragma once
/// \file
/// Implementation of the Diligent::FenceBase template class
#include <atomic>
#include "DeviceObjectBase.hpp"
#include "GraphicsTypes.h"
#include "RefCntAutoPtr.hpp"
namespace Diligent
{
/// Template class implementing base functionality of the fence object
/// \tparam EngineImplTraits - Engine implementation type traits.
template <typename EngineImplTraits>
class FenceBase : public DeviceObjectBase<typename EngineImplTraits::FenceInterface, typename EngineImplTraits::RenderDeviceImplType, FenceDesc>
{
public:
// Base interface that this class inherits (IFenceD3D12, IFenceVk, etc.).
using BaseInterface = typename EngineImplTraits::FenceInterface;
// Render device implementation type (RenderDeviceD3D12Impl, RenderDeviceVkImpl, etc.).
using RenderDeviceImplType = typename EngineImplTraits::RenderDeviceImplType;
typedef DeviceObjectBase<BaseInterface, RenderDeviceImplType, FenceDesc> TDeviceObjectBase;
/// \param pRefCounters - Reference counters object that controls the lifetime of this command list.
/// \param Desc - Fence description
/// \param pDevice - Pointer to the device.
/// \param bIsDeviceInternal - Flag indicating if the Fence is an internal device object and
/// must not keep a strong reference to the device.
FenceBase(IReferenceCounters* pRefCounters, RenderDeviceImplType* pDevice, const FenceDesc& Desc, bool bIsDeviceInternal = false) :
TDeviceObjectBase{pRefCounters, pDevice, Desc, bIsDeviceInternal}
{}
~FenceBase()
{
}
IMPLEMENT_QUERY_INTERFACE_IN_PLACE(IID_Fence, TDeviceObjectBase)
protected:
void UpdateLastCompletedFenceValue(uint64_t NewValue)
{
auto LastCompletedValue = m_LastCompletedFenceValue.load();
while (!m_LastCompletedFenceValue.compare_exchange_strong(LastCompletedValue, std::max(LastCompletedValue, NewValue)))
{
// If exchange fails, LastCompletedValue will hold the actual value of m_LastCompletedFenceValue.
}
}
std::atomic_uint64_t m_LastCompletedFenceValue{0};
};
} // namespace Diligent
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