mirror of
https://github.com/gnif/LookingGlass.git
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bacf376305
Add a protocol-independent recovery channel outside LGMP so clients can request a usable guest display even when transport versions differ. Synchronize recovery state with the helper across driver restarts and restore the configured topology without persisting temporary changes.
73 lines
2.0 KiB
C++
73 lines
2.0 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 "CSRWLock.h"
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#include <stdint.h>
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struct KVMFRR;
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struct KVMFRRRequest;
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struct KVMFRRStatus;
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class CIVSHMEM;
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class CRecovery
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{
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public:
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struct Request
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{
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uint64_t session = 0;
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uint32_t serial = 0;
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bool valid = false;
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bool active = false;
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};
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private:
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CSRWLock m_lock;
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KVMFRR * m_data = nullptr;
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uint64_t m_session = 0;
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uint64_t m_nextHeartbeat = 0;
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uint64_t m_deadline = 0;
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uint32_t m_lastSerial = 0;
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uint32_t m_statusSerial = 0;
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uint32_t m_request = 0;
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bool m_syncReady = false;
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bool m_replay = false;
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bool m_waiting = false;
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static bool ReadRequest(KVMFRRRequest& source, KVMFRRRequest& result);
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static bool ReadStatus(KVMFRRStatus& source, KVMFRRStatus& result);
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static bool SerialNewer(uint32_t serial, uint32_t reference);
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bool OwnsSession();
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uint32_t NextTicket();
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void Publish(uint32_t serial, uint32_t request,
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uint32_t state, uint32_t error);
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public:
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bool Initialize(CIVSHMEM& ivshmem);
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void Sync();
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Request Process();
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void SetStatus(uint64_t session, uint32_t serial, bool active,
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uint32_t state, uint32_t error);
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};
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