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https://github.com/genxium/DelayNoMore
synced 2024-12-26 03:39:00 +00:00
Added necessary locking for backend InputsBuffer.
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genxium
parent
f3a12b2aa9
commit
26370dce61
@ -158,7 +158,7 @@ type Room struct {
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DismissalWaitGroup sync.WaitGroup
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Barriers map[int32]*Barrier
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InputsBuffer *RingBuffer // Indices are STRICTLY consecutive
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DiscreteInputsBuffer sync.Map // Indices are NOT NECESSARILY consecutive
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InputsBufferLock sync.Mutex
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RenderFrameBuffer *RingBuffer
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LastAllConfirmedInputFrameId int32
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LastAllConfirmedInputFrameIdWithChange int32
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@ -172,7 +172,8 @@ type Room struct {
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BulletBattleLocalIdCounter int32
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dilutedRollbackEstimatedDtNanos int64
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BattleColliderInfo // Compositing to send centralized magic numbers
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BattleColliderInfo // Compositing to send centralized magic numbers
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}
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func (pR *Room) updateScore() {
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@ -412,13 +413,6 @@ func (pR *Room) StartBattle() {
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Logger.Info("The `battleMainLoop` is started for:", zap.Any("roomId", pR.Id))
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for {
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pR.markConfirmationIfApplicable()
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unconfirmedMask := uint64(0)
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// [WARNING] Downsync the all-confirmed inputFrames asap!
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upperToSendInputFrameId := pR.LastAllConfirmedInputFrameId
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for playerId, player := range pR.Players {
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pR.downsyncToSinglePlayer(playerId, player, upperToSendInputFrameId, unconfirmedMask)
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}
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stCalculation := utils.UnixtimeNano()
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elapsedNanosSinceLastFrameIdTriggered := stCalculation - pR.LastRenderFrameIdTriggeredAt
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@ -436,21 +430,46 @@ func (pR *Room) StartBattle() {
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return
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}
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// Prefab and buffer backend inputFrameDownsync
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if pR.shouldPrefabInputFrameDownsync(pR.RenderFrameId) {
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noDelayInputFrameId := pR.ConvertToInputFrameId(pR.RenderFrameId, 0)
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pR.prefabInputFrameDownsync(noDelayInputFrameId)
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if 0 == pR.RenderFrameId {
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for playerId, player := range pR.Players {
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currPlayerBattleState := atomic.LoadInt32(&(player.BattleState)) // Might be changed in "OnPlayerDisconnected/OnPlayerLost" from other threads
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// [WARNING] DON'T try to send any message to an inactive player!
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switch currPlayerBattleState {
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case PlayerBattleStateIns.DISCONNECTED:
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case PlayerBattleStateIns.LOST:
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continue
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}
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kickoffFrame := pR.RenderFrameBuffer.GetByFrameId(0).(*RoomDownsyncFrame)
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pR.sendSafely(kickoffFrame, nil, DOWNSYNC_MSG_ACT_BATTLE_START, playerId)
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}
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Logger.Info(fmt.Sprintf("In `battleMainLoop` for roomId=%v sent out kickoffFrame", pR.Id))
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}
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upperToSendInputFrameId := pR.LastAllConfirmedInputFrameId
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dynamicsDuration := int64(0)
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unconfirmedMask := uint64(0)
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// Prefab and buffer backend inputFrameDownsync
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if pR.BackendDynamicsForceConfirmationEnabled {
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pR.InputsBufferLock.Lock()
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defer func() {
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pR.InputsBufferLock.Unlock()
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}()
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if pR.shouldPrefabInputFrameDownsync(pR.RenderFrameId) {
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noDelayInputFrameId := pR.ConvertToInputFrameId(pR.RenderFrameId, 0)
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if existingInputFrame := pR.InputsBuffer.GetByFrameId(noDelayInputFrameId); nil == existingInputFrame {
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pR.prefabInputFrameDownsync(noDelayInputFrameId)
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}
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}
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// Force setting all-confirmed of buffered inputFrames periodically
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unconfirmedMask = pR.forceConfirmationIfApplicable()
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}
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upperToSendInputFrameId = pR.LastAllConfirmedInputFrameId
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dynamicsDuration := int64(0)
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if pR.BackendDynamicsEnabled {
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pR.InputsBufferLock.Lock()
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defer func() {
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pR.InputsBufferLock.Unlock()
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}()
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if 0 <= pR.LastAllConfirmedInputFrameId {
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dynamicsStartedAt := utils.UnixtimeNano()
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// Apply "all-confirmed inputFrames" to move forward "pR.CurDynamicsRenderFrameId"
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@ -488,39 +507,60 @@ func (pR *Room) toDiscreteInputsBufferIndex(inputFrameId int32, joinIndex int32)
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}
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func (pR *Room) OnBattleCmdReceived(pReq *WsReq) {
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// [WARNING] This function "OnBattleCmdReceived" could be called by different ws sessions and thus from different threads!
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if swapped := atomic.CompareAndSwapInt32(&pR.State, RoomBattleStateIns.IN_BATTLE, RoomBattleStateIns.IN_BATTLE); !swapped {
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return
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}
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playerId := pReq.PlayerId
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var player *Player = nil
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var existent bool = false
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inputFrameUpsyncBatch := pReq.InputFrameUpsyncBatch
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ackingFrameId := pReq.AckingFrameId
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ackingInputFrameId := pReq.AckingInputFrameId
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if _, existent := pR.Players[playerId]; !existent {
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if player, existent = pR.Players[playerId]; !existent {
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Logger.Warn(fmt.Sprintf("upcmd player doesn't exist: roomId=%v, playerId=%v", pR.Id, playerId))
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return
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}
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if swapped := atomic.CompareAndSwapInt32(&(pR.Players[playerId].AckingFrameId), pR.Players[playerId].AckingFrameId, ackingFrameId); !swapped {
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panic(fmt.Sprintf("Failed to update AckingFrameId to %v for roomId=%v, playerId=%v", ackingFrameId, pR.Id, playerId))
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}
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atomic.StoreInt32(&(player.AckingFrameId), ackingFrameId)
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atomic.StoreInt32(&(player.AckingInputFrameId), ackingInputFrameId)
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if swapped := atomic.CompareAndSwapInt32(&(pR.Players[playerId].AckingInputFrameId), pR.Players[playerId].AckingInputFrameId, ackingInputFrameId); !swapped {
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panic(fmt.Sprintf("Failed to update AckingInputFrameId to %v for roomId=%v, playerId=%v", ackingInputFrameId, pR.Id, playerId))
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}
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pR.InputsBufferLock.Lock()
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defer func() {
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pR.InputsBufferLock.Unlock()
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}()
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for _, inputFrameUpsync := range inputFrameUpsyncBatch {
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clientInputFrameId := inputFrameUpsync.InputFrameId
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if clientInputFrameId < pR.InputsBuffer.StFrameId {
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// The updates to "pR.InputsBuffer.StFrameId" is monotonically increasing, thus if "clientInputFrameId < pR.InputsBuffer.StFrameId" at any moment of time, it is obsolete in the future.
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Logger.Debug(fmt.Sprintf("Omitting obsolete inputFrameUpsync: roomId=%v, playerId=%v, clientInputFrameId=%v, InputsBuffer=%v", pR.Id, playerId, clientInputFrameId, pR.InputsBufferString(false)))
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Logger.Warn(fmt.Sprintf("Omitting obsolete inputFrameUpsync: roomId=%v, playerId=%v, clientInputFrameId=%v, InputsBuffer=%v", pR.Id, playerId, clientInputFrameId, pR.InputsBufferString(false)))
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continue
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}
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bufIndex := pR.toDiscreteInputsBufferIndex(clientInputFrameId, pReq.JoinIndex)
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pR.DiscreteInputsBuffer.Store(bufIndex, inputFrameUpsync)
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// TODO: "pR.DiscreteInputsBuffer" might become too large with outdated "inputFrameUpsync" items, maintain another queue orderd by timestamp to evict them
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if clientInputFrameId > pR.InputsBuffer.EdFrameId {
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Logger.Warn(fmt.Sprintf("Dropping too advanced inputFrameUpsync: roomId=%v, playerId=%v, clientInputFrameId=%v, InputsBuffer=%v; is this player cheating?", pR.Id, playerId, clientInputFrameId, pR.InputsBufferString(false)))
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continue
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}
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var targetInputFrameDownsync *InputFrameDownsync = nil
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if clientInputFrameId == pR.InputsBuffer.EdFrameId {
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targetInputFrameDownsync = pR.prefabInputFrameDownsync(clientInputFrameId)
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Logger.Debug(fmt.Sprintf("OnBattleCmdReceived-Prefabbed new inputFrameDownsync from inputFrameUpsync: roomId=%v, playerId=%v, clientInputFrameId=%v, InputsBuffer=%v", pR.Id, playerId, clientInputFrameId, pR.InputsBufferString(false)))
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} else {
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targetInputFrameDownsync = pR.InputsBuffer.GetByFrameId(clientInputFrameId).(*InputFrameDownsync)
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Logger.Debug(fmt.Sprintf("OnBattleCmdReceived-stuffing inputFrameDownsync from inputFrameUpsync: roomId=%v, playerId=%v, clientInputFrameId=%v, InputsBuffer=%v", pR.Id, playerId, clientInputFrameId, pR.InputsBufferString(false)))
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}
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targetInputFrameDownsync.InputList[player.JoinIndex-1] = inputFrameUpsync.Encoded
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targetInputFrameDownsync.ConfirmedList |= uint64(1 << uint32(player.JoinIndex-1))
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}
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newAllConfirmedCount := pR.markConfirmationIfApplicable()
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if 0 < newAllConfirmedCount {
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// Downsync new all-confirmed inputFrames asap
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unconfirmedMask := uint64(0)
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for playerId, player := range pR.Players {
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pR.downsyncToSinglePlayer(playerId, player, pR.LastAllConfirmedInputFrameId, unconfirmedMask)
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}
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}
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}
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@ -675,7 +715,6 @@ func (pR *Room) OnDismissed() {
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pR.Barriers = make(map[int32]*Barrier)
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pR.RenderCacheSize = 1024
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pR.RenderFrameBuffer = NewRingBuffer(pR.RenderCacheSize)
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pR.DiscreteInputsBuffer = sync.Map{}
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pR.InputsBuffer = NewRingBuffer((pR.RenderCacheSize >> 2) + 1)
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pR.LastAllConfirmedInputFrameId = -1
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@ -697,7 +736,7 @@ func (pR *Room) OnDismissed() {
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pR.InputFrameUpsyncDelayTolerance = 2
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pR.MaxChasingRenderFramesPerUpdate = 8
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pR.BackendDynamicsEnabled = true // [WARNING] When "false", recovery upon reconnection wouldn't work!
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pR.BackendDynamicsEnabled = false // [WARNING] When "false", recovery upon reconnection wouldn't work!
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pR.BackendDynamicsForceConfirmationEnabled = (pR.BackendDynamicsEnabled && true)
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punchSkillId := int32(1)
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pR.MeleeSkillConfig = make(map[int32]*MeleeBullet, 0)
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@ -998,34 +1037,28 @@ func (pR *Room) prefabInputFrameDownsync(inputFrameId int32) *InputFrameDownsync
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return currInputFrameDownsync
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}
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func (pR *Room) markConfirmationIfApplicable() {
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func (pR *Room) markConfirmationIfApplicable() int {
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newAllConfirmedCount := 0
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inputFrameId1 := pR.LastAllConfirmedInputFrameId + 1
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totPlayerCnt := uint32(pR.Capacity)
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allConfirmedMask := uint64((1 << totPlayerCnt) - 1)
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for inputFrameId := inputFrameId1; inputFrameId < pR.InputsBuffer.EdFrameId; inputFrameId++ {
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tmp := pR.InputsBuffer.GetByFrameId(inputFrameId)
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if nil == tmp {
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panic(fmt.Sprintf("inputFrameId=%v doesn't exist for roomId=%v, this is abnormal because the server should prefab inputFrameDownsync in a most advanced pace, check the prefab logic (Or maybe you're having a 'Room.RenderCacheSize' too small)! InputsBuffer=%v", inputFrameId, pR.Id, pR.InputsBufferString(false)))
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panic(fmt.Sprintf("inputFrameId=%v doesn't exist for roomId=%v! InputsBuffer=%v", inputFrameId, pR.Id, pR.InputsBufferString(false)))
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}
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inputFrameDownsync := tmp.(*InputFrameDownsync)
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for _, player := range pR.Players {
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bufIndex := pR.toDiscreteInputsBufferIndex(inputFrameId, player.JoinIndex)
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tmp, loaded := pR.DiscreteInputsBuffer.LoadAndDelete(bufIndex) // It's safe to "LoadAndDelete" here because the "inputFrameUpsync" of this player is already remembered by the corresponding "inputFrameDown".
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if !loaded {
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continue
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}
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inputFrameUpsync := tmp.(*InputFrameUpsync)
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indiceInJoinIndexBooleanArr := uint32(player.JoinIndex - 1)
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inputFrameDownsync.InputList[indiceInJoinIndexBooleanArr] = inputFrameUpsync.Encoded
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inputFrameDownsync.ConfirmedList |= (1 << indiceInJoinIndexBooleanArr)
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}
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if allConfirmedMask == inputFrameDownsync.ConfirmedList {
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newAllConfirmedCount += 1
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pR.onInputFrameDownsyncAllConfirmed(inputFrameDownsync, -1)
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} else {
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break
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}
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}
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Logger.Info(fmt.Sprintf("markConfirmationIfApplicable checking inputFrameId=[%v, %v) for roomId=%v, newAllConfirmedCount=%d: InputsBuffer=%v", inputFrameId1, pR.InputsBuffer.EdFrameId, pR.Id, newAllConfirmedCount, pR.InputsBufferString(false)))
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return newAllConfirmedCount
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}
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func (pR *Room) forceConfirmationIfApplicable() uint64 {
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@ -1375,8 +1408,6 @@ func (pR *Room) printBarrier(barrierCollider *resolv.Object) {
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}
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func (pR *Room) downsyncToSinglePlayer(playerId int32, player *Player, upperToSendInputFrameId int32, unconfirmedMask uint64) {
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// [WARNING] "pR.InputsBuffer" isn't thread-safe, thus it's critical to guarantee that "pR.InputsBuffer.Put/Pop/GetByFrameId" are all executed by "battleMainLoop" only, i.e. this function should also be executed by "battleMainLoop" only!
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currPlayerBattleState := atomic.LoadInt32(&(player.BattleState)) // Might be changed in "OnPlayerDisconnected/OnPlayerLost" from other threads
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// [WARNING] DON'T try to send any message to an inactive player!
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@ -1431,7 +1462,7 @@ func (pR *Room) downsyncToSinglePlayer(playerId int32, player *Player, upperToSe
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}
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if 0 >= len(toSendInputFrames) {
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Logger.Warn(fmt.Sprintf("Not sending due to empty toSendInputFrames: roomId=%v, playerId=%v, refRenderFrameId=%v, upperToSendInputFrameId=%v, lastSentInputFrameId=%v, playerAckingInputFrameId=%v", pR.Id, playerId, refRenderFrameId, upperToSendInputFrameId, player.LastSentInputFrameId, player.AckingInputFrameId))
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Logger.Debug(fmt.Sprintf("Not sending due to empty toSendInputFrames: roomId=%v, playerId=%v, refRenderFrameId=%v, upperToSendInputFrameId=%v, lastSentInputFrameId=%v, playerAckingInputFrameId=%v", pR.Id, playerId, refRenderFrameId, upperToSendInputFrameId, player.LastSentInputFrameId, player.AckingInputFrameId))
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return
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}
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@ -365,7 +365,7 @@ func Serve(c *gin.Context) {
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return nil
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}
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// Tries to receive from client-side in a non-blocking manner.
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// TODO: Is there any potential edge-trigger improvement like the epoll approach mentioned above for the following statement? See discussion in https://github.com/gorilla/websocket/issues/122
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_, bytes, err := conn.ReadMessage()
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if nil != err {
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Logger.Error("About to `signalToCloseConnOfThisPlayer`", zap.Any("roomId", pRoom.Id), zap.Any("playerId", playerId), zap.Error(err))
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