chore: migrate to gitea

vendor/github.com/quic-go/quic-go/internal/ackhandler/packet.go

@@ -0,0 +1,60 @@
+package ackhandler
+
+import (
+	"sync"
+
+	"github.com/quic-go/quic-go/internal/monotime"
+	"github.com/quic-go/quic-go/internal/protocol"
+)
+
+type packetWithPacketNumber struct {
+	PacketNumber protocol.PacketNumber
+	*packet
+}
+
+// A Packet is a packet
+type packet struct {
+	SendTime        monotime.Time
+	StreamFrames    []StreamFrame
+	Frames          []Frame
+	LargestAcked    protocol.PacketNumber // InvalidPacketNumber if the packet doesn't contain an ACK
+	Length          protocol.ByteCount
+	EncryptionLevel protocol.EncryptionLevel
+
+	IsPathMTUProbePacket bool // We don't report the loss of Path MTU probe packets to the congestion controller.
+
+	includedInBytesInFlight bool
+	isPathProbePacket       bool
+}
+
+func (p *packet) Outstanding() bool {
+	return !p.IsPathMTUProbePacket && !p.isPathProbePacket && p.IsAckEliciting()
+}
+
+func (p *packet) IsAckEliciting() bool {
+	return len(p.StreamFrames) > 0 || len(p.Frames) > 0
+}
+
+var packetPool = sync.Pool{New: func() any { return &packet{} }}
+
+func getPacket() *packet {
+	p := packetPool.Get().(*packet)
+	p.StreamFrames = nil
+	p.Frames = nil
+	p.LargestAcked = 0
+	p.Length = 0
+	p.EncryptionLevel = protocol.EncryptionLevel(0)
+	p.SendTime = 0
+	p.IsPathMTUProbePacket = false
+	p.includedInBytesInFlight = false
+	p.isPathProbePacket = false
+	return p
+}
+
+// We currently only return Packets back into the pool when they're acknowledged (not when they're lost).
+// This simplifies the code, and gives the vast majority of the performance benefit we can gain from using the pool.
+func putPacket(p *packet) {
+	p.Frames = nil
+	p.StreamFrames = nil
+	packetPool.Put(p)
+}