mirror of
https://github.com/gnif/LookingGlass.git
synced 2026-08-09 00:31:31 +00:00
909271bfe1
Replace the shared force and republish booleans with request tickets. A completed publication now acknowledges only requests captured when it began, so a concurrent immediate or cadence-break request survives.
134 lines
4.1 KiB
C++
134 lines
4.1 KiB
C++
/**
|
|
* 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 forceTicket;
|
|
uint64_t republishTicket;
|
|
};
|
|
|
|
private:
|
|
struct Client
|
|
{
|
|
uint32_t clientID;
|
|
uint32_t generation;
|
|
uint64_t period;
|
|
uint64_t targetSlack;
|
|
uint64_t expiry;
|
|
uint64_t nextDelivery;
|
|
uint32_t lastFeedbackFrameSerial;
|
|
uint32_t lastDeliveredFrameSerial;
|
|
bool subscribed;
|
|
bool ownerCapable;
|
|
bool subscriptionSeen;
|
|
bool active;
|
|
bool immediate;
|
|
bool deliveredFrameValid;
|
|
};
|
|
|
|
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_nextDeadline = 0;
|
|
|
|
uint32_t m_lastPublishedFrameSerial = 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);
|
|
bool ElectOwner(uint64_t now);
|
|
bool ApplyFeedback(Client& client, const KVMFRFrameSchedule& schedule);
|
|
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 FrameSuperseded();
|
|
void FramePublished(const Schedule& schedule, uint32_t frameSerial,
|
|
uint64_t now, bool periodic);
|
|
void FrameRepublished(const Schedule& schedule, uint32_t frameSerial);
|
|
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 NotifyPublisher() const { WakePublisher(); }
|
|
void RecordFrameTiming(uint64_t duration);
|
|
void LogStatistics(uint64_t now);
|
|
};
|