Mirrored_Repos/LookingGlass
1
0
Fork 0
mirror of https://github.com/gnif/LookingGlass.git synced 2026-08-09 16:51:31 +00:00
Code Issues Actions 2 Packages Projects Releases Wiki Activity

[idd] transport: abstract LGMP implementation

Browse Source 
Introduce transport, frame, and control interfaces with an LGMP factory
backend.

Move LGMP and IVSHMEM implementation details under transport/lgmp and
expose direct frame-buffer memory through a neutral capability.
This commit is contained in:
Geoffrey McRae
2026-08-07 16:39:07 +10:00
parent 30a1383d5e
commit 6725133375
46 changed files with 1026 additions and 480 deletions
Download Patch File Download Diff File Expand all files Collapse all files

171
idd/LGIdd/capture/CFrameScheduler.h
View File

@@ -1,171 +0,0 @@
/**
* Looking Glass
* Copyright © 2017-2026 The Looking Glass Authors
* https://looking-glass.io
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc., 59
* Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#pragma once
#include <Windows.h>
#include <stdint.h>
extern "C" {
#include <lgmp/lgmp.h>
}
#include "common/KVMFR.h"
class CFrameScheduler
{
public:
struct Schedule
{
uint32_t clientID;
uint32_t generation;
uint32_t epoch;
uint64_t period;
uint64_t targetSlack;
uint64_t deadline;
uint64_t forceTicket;
uint64_t republishTicket;
uint32_t deadlineSerial;
uint32_t deliveryDeadlineSerial;
bool phaseEligible;
};
private:
struct Client
{
uint32_t clientID;
uint32_t generation;
uint64_t period;
uint64_t targetSlack;
uint64_t expiry;
uint64_t nextDelivery;
uint32_t lastFeedbackDeadlineSerial;
uint32_t lastDeliveredFrameSerial;
bool subscribed;
bool ownerCapable;
bool subscriptionSeen;
bool active;
bool immediate;
bool deliveredFrameValid;
};
struct Publication
{
uint32_t generation;
uint32_t epoch;
uint32_t deadlineSerial;
uint32_t frameSerial;
uint64_t deadline;
bool committed;
bool completed;
bool phaseValid;
bool accepted;
};
static const unsigned PUBLICATION_HISTORY_SIZE = 128;
static const unsigned WORK_TIMING_HISTORY_SIZE = 32;
mutable SRWLOCK m_lock = SRWLOCK_INIT;
HANDLE m_wakeEvent = nullptr;
Client m_clients[LGMP_MAX_CLIENTS] = {};
Schedule m_schedule = {};
bool m_scheduling = false;
uint32_t m_epoch = 0;
// A result acknowledges only the request tickets captured by its attempt.
uint64_t m_forceRequestTicket = 0;
uint64_t m_forceAckTicket = 0;
uint64_t m_republishRequestTicket = 0;
uint64_t m_republishAckTicket = 0;
uint64_t m_lastArrival = 0;
uint64_t m_guestPeriod = 0;
uint64_t m_workEstimate = 0;
uint64_t m_workTiming[WORK_TIMING_HISTORY_SIZE] = {};
unsigned m_workTimingCount = 0;
unsigned m_workTimingIndex = 0;
uint64_t m_nextDeadline = 0;
uint32_t m_deadlineSerial = 0;
int64_t m_pendingCorrection = 0;
Publication m_publications[PUBLICATION_HISTORY_SIZE] = {};
unsigned m_publicationIndex = 0;
int64_t m_lastPhaseError = 0;
uint64_t m_acquiredFrames = 0;
uint64_t m_skippedFrames = 0;
uint64_t m_publishedFrames = 0;
uint64_t m_lastLog = 0;
uint64_t m_lastLogAcquired = 0;
uint64_t m_lastLogSkipped = 0;
uint64_t m_lastLogPublished = 0;
Client * FindClient(uint32_t clientID);
Client * FindOrAllocateClient(uint32_t clientID);
Publication * FindPublication(const Schedule& schedule,
uint32_t frameSerial);
bool ElectOwner(uint64_t now, uint32_t resetClientID = 0);
bool ApplyFeedback(Client& client, const KVMFRFrameSchedule& schedule);
void AdvanceCurrentDeadline();
void AdvanceDeadlineSerial(uint64_t count);
void AdvanceDeadline(uint64_t now);
static void AdvanceDelivery(Client& client, uint64_t now);
void WakePublisher() const;
public:
CFrameScheduler();
~CFrameScheduler();
static uint64_t Nanotime();
void Reset();
void UpdateSubscribers(const uint32_t * clientIDs, unsigned count,
const uint32_t * ownerClientIDs, unsigned ownerCount, uint64_t now);
bool UpdateSchedule(uint32_t sourceClientID,
const KVMFRFrameSchedule& schedule, uint64_t now);
bool GetSchedule(Schedule& schedule) const;
HANDLE GetWakeEvent() const { return m_wakeEvent; }
void ObserveFrame(uint64_t now);
void ForceFrame();
bool GetPublishTarget(uint64_t now, uint64_t& target,
Schedule& schedule, bool& periodic, bool& republish);
void FrameMissed(const Schedule& schedule, uint64_t now, bool periodic);
void FrameSuperseded();
bool TryFrameSubmitted(const Schedule& schedule, uint32_t frameSerial);
void FramePublished(const Schedule& schedule, uint32_t frameSerial,
uint64_t now, bool periodic);
void FrameRetained(const Schedule& schedule, uint64_t now,
bool periodic);
void FrameRepublished(const Schedule& schedule, uint32_t frameSerial);
bool TryFrameCompleted(const Schedule& schedule, uint32_t frameSerial,
uint64_t completedAt);
unsigned GetSecondaryRecipients(const uint32_t * clientIDs,
unsigned count, uint32_t frameSerial, uint64_t now,
uint32_t * recipients) const;
bool GetSecondaryTarget(uint32_t frameSerial, uint64_t now,
const uint32_t * blockedClientIDs, unsigned blockedCount,
uint64_t& target) const;
void FrameDelivered(const uint32_t * clientIDs, unsigned count,
uint32_t frameSerial, uint64_t now);
void RequestRepublish();
void NotifyPublisher() const { WakePublisher(); }
void TryRecordFrameTiming(uint64_t duration);
void LogStatistics(uint64_t now);
};