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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.
*/
#include "pch.h"
#include "CommandQueueD3D12Impl.hpp"
namespace Diligent
{
CommandQueueD3D12Impl::CommandQueueD3D12Impl(IReferenceCounters* pRefCounters,
ID3D12CommandQueue* pd3d12NativeCmdQueue,
ID3D12Fence* pd3d12Fence) :
// clang-format off
TBase{pRefCounters},
m_pd3d12CmdQueue {pd3d12NativeCmdQueue},
m_d3d12Fence {pd3d12Fence },
m_NextFenceValue {1 },
m_WaitForGPUEventHandle{CreateEvent(nullptr, false, false, nullptr)}
// clang-format on
{
VERIFY_EXPR(m_WaitForGPUEventHandle != INVALID_HANDLE_VALUE);
m_d3d12Fence->Signal(0);
}
CommandQueueD3D12Impl::~CommandQueueD3D12Impl()
{
CloseHandle(m_WaitForGPUEventHandle);
}
Uint64 CommandQueueD3D12Impl::Submit(Uint32 NumCommandLists,
ID3D12CommandList* const* ppCommandLists)
{
std::lock_guard<std::mutex> Lock{m_QueueMtx};
// Increment the value before submitting the list
auto FenceValue = m_NextFenceValue.fetch_add(1);
// Render device submits null command list to signal the fence and
// discard all resources.
if (NumCommandLists != 0 && ppCommandLists != nullptr)
{
#ifdef DILIGENT_DEBUG
for (Uint32 i = 0; i < NumCommandLists; ++i)
{
VERIFY(ppCommandLists[i] != nullptr, "Command list must not be null");
}
#endif
m_pd3d12CmdQueue->ExecuteCommandLists(NumCommandLists, ppCommandLists);
}
// Signal the fence. This must be done atomically with command list submission.
m_pd3d12CmdQueue->Signal(m_d3d12Fence, FenceValue);
return FenceValue;
}
Uint64 CommandQueueD3D12Impl::WaitForIdle()
{
std::lock_guard<std::mutex> Lock{m_QueueMtx};
Uint64 LastSignaledFenceValue = m_NextFenceValue.fetch_add(1);
m_pd3d12CmdQueue->Signal(m_d3d12Fence, LastSignaledFenceValue);
if (GetCompletedFenceValue() < LastSignaledFenceValue)
{
m_d3d12Fence->SetEventOnCompletion(LastSignaledFenceValue, m_WaitForGPUEventHandle);
WaitForSingleObject(m_WaitForGPUEventHandle, INFINITE);
VERIFY(GetCompletedFenceValue() == LastSignaledFenceValue, "Unexpected signaled fence value");
}
return LastSignaledFenceValue;
}
Uint64 CommandQueueD3D12Impl::GetCompletedFenceValue()
{
auto CompletedFenceValue = m_d3d12Fence->GetCompletedValue();
VERIFY(CompletedFenceValue != UINT64_MAX, "If the device has been removed, the return value will be UINT64_MAX");
auto CurrValue = m_LastCompletedFenceValue.load();
while (!m_LastCompletedFenceValue.compare_exchange_strong(CurrValue, std::max(CurrValue, CompletedFenceValue)))
{
// If exchange fails, CurrValue will hold the actual value of m_LastCompletedFenceValue
}
return m_LastCompletedFenceValue.load();
}
void CommandQueueD3D12Impl::SignalFence(ID3D12Fence* pFence, Uint64 Value)
{
std::lock_guard<std::mutex> Lock{m_QueueMtx};
m_pd3d12CmdQueue->Signal(pFence, Value);
}
} // namespace Diligent
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