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https://github.com/gnif/LookingGlass.git
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84e0a1b956
Invalidate in-progress swap chain setup when IddCx unassigns the monitor, and serialize replacement assignments so workers are never started on abandoned handles. Also initialize all worker dependencies before starting the processing thread and treat teardown during SetDevice as normal cancellation.
89 lines
2.7 KiB
C++
89 lines
2.7 KiB
C++
/**
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* Looking Glass
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* Copyright © 2017-2026 The Looking Glass Authors
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* https://looking-glass.io
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc., 59
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* Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#pragma once
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#include <Windows.h>
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#include <wdf.h>
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#include <IddCx.h>
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#include <atomic>
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#include <memory>
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#include <mutex>
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#include "CIndirectDeviceContext.h"
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#include "CSwapChainProcessor.h"
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using namespace Microsoft::WRL;
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class CIndirectMonitorContext
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{
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private:
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IDDCX_MONITOR m_monitor;
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// Guards the swap chain and device pointers. Assign and unassign can run
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// concurrently (an unassign triggered by the worker's WdfObjectDelete can
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// race the next assign), and shared_ptr copy/reset is not thread safe.
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SRWLOCK m_lock = SRWLOCK_INIT;
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// IddCx can issue a replacement assignment before an earlier assignment
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// has finished creating its devices. Serialize those expensive setup paths
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// while still allowing UnassignSwapChain to cancel the active one.
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std::mutex m_assignMutex;
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std::shared_ptr<CD3D11Device> m_dx11Device;
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std::shared_ptr<CD3D12Device> m_dx12Device;
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CIndirectDeviceContext * m_devContext;
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std::unique_ptr<CSwapChainProcessor> m_swapChain;
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// Incremented whenever the current assignment is replaced or unassigned.
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// Device creation is performed outside m_lock, so this lets an unassign
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// cancel that work before a processor is started on a stale swap chain.
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std::atomic<UINT64> m_assignmentGeneration = 0;
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void DetachSwapChain();
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public:
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CIndirectMonitorContext(_In_ IDDCX_MONITOR monitor, CIndirectDeviceContext * device);
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virtual ~CIndirectMonitorContext();
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void AssignSwapChain(IDDCX_SWAPCHAIN swapChain, LUID renderAdapter, HANDLE newFrameEvent);
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void UnassignSwapChain();
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bool IsAssignmentCurrent(UINT64 generation) const
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{
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return m_assignmentGeneration.load(std::memory_order_acquire) == generation;
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}
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CIndirectDeviceContext * GetDeviceContext() { return m_devContext; }
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};
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struct CIndirectMonitorContextWrapper
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{
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CIndirectMonitorContext* context;
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void Cleanup()
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{
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delete context;
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context = nullptr;
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}
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};
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WDF_DECLARE_CONTEXT_TYPE(CIndirectMonitorContextWrapper);
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