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https://github.com/gnif/LookingGlass.git
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9898e9bcec
Define a fixed, protocol-independent recovery ABI in the final 64 KiB of IVSHMEM. Provide crash-safe multi-client requests and coherent producer status. Exclude the region from LGMP allocation and frame capacity so future protocol mismatches retain a stable control path.
69 lines
1.7 KiB
C++
69 lines
1.7 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 <SetupAPI.h>
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#include <vector>
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#include "common/KVMFRRecovery.h"
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class CIVSHMEM
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{
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private:
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struct IVSHMEMData
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{
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SP_DEVINFO_DATA devInfoData;
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DWORD64 busAddr;
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};
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std::vector<struct IVSHMEMData> m_devices;
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HANDLE m_handle = INVALID_HANDLE_VALUE;
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size_t m_size = 0;
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void * m_mem = nullptr;
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public:
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CIVSHMEM();
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~CIVSHMEM();
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bool Init();
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bool Open();
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void Close();
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size_t GetFullSize () const { return m_size; }
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size_t GetUsableSize () const
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{
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if (m_size < KVMFR_R_REGION_SIZE)
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return 0;
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return m_size - KVMFR_R_REGION_SIZE;
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}
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void * GetMem () const { return m_mem; }
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void * GetRecoveryMem () const
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{
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if (!m_mem || m_size < KVMFR_R_REGION_SIZE)
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return nullptr;
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return static_cast<uint8_t *>(m_mem) + GetUsableSize();
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}
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};
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