mirror of
https://github.com/gnif/LookingGlass.git
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30a1383d5e
Group the IDD sources and Visual Studio filters by subsystem. Split the device and swap-chain implementations into focused units, rename the context classes, and reduce header coupling.
90 lines
2.6 KiB
C++
90 lines
2.6 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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struct CD3D11Device;
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class CDeviceContext;
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class CSwapChainProcessor;
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class CMonitorContext
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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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CDeviceContext * 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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CMonitorContext(
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_In_ IDDCX_MONITOR monitor, CDeviceContext * device);
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virtual ~CMonitorContext();
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NTSTATUS AssignSwapChain(
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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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CDeviceContext * GetDeviceContext() { return m_devContext; }
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};
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struct CMonitorContextWrapper
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{
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CMonitorContext * 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(CMonitorContextWrapper);
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