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50 lines
1.5 KiB
Go
50 lines
1.5 KiB
Go
package multiplex
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import (
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"sync/atomic"
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"github.com/juju/ratelimit"
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)
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// Valve needs to be universal, across all sessions that belong to a user
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// gabe please don't sue
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type Valve struct {
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// traffic directions from the server's perspective are refered
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// exclusively as rx and tx.
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// rx is from client to server, tx is from server to client
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// DO NOT use terms up or down as this is used in usermanager
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// for bandwidth limiting
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rxtb atomic.Value // *ratelimit.Bucket
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txtb atomic.Value // *ratelimit.Bucket
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rx *int64
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tx *int64
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}
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func MakeValve(rxRate, txRate int64) *Valve {
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var rx, tx int64
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v := &Valve{
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rx: &rx,
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tx: &tx,
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}
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v.SetRxRate(rxRate)
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v.SetTxRate(txRate)
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return v
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}
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var UNLIMITED_VALVE = MakeValve(1<<63-1, 1<<63-1)
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func (v *Valve) SetRxRate(rate int64) { v.rxtb.Store(ratelimit.NewBucketWithRate(float64(rate), rate)) }
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func (v *Valve) SetTxRate(rate int64) { v.txtb.Store(ratelimit.NewBucketWithRate(float64(rate), rate)) }
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func (v *Valve) rxWait(n int) { v.rxtb.Load().(*ratelimit.Bucket).Wait(int64(n)) }
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func (v *Valve) txWait(n int) { v.txtb.Load().(*ratelimit.Bucket).Wait(int64(n)) }
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func (v *Valve) AddRx(n int64) { atomic.AddInt64(v.rx, n) }
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func (v *Valve) AddTx(n int64) { atomic.AddInt64(v.tx, n) }
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func (v *Valve) GetRx() int64 { return atomic.LoadInt64(v.rx) }
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func (v *Valve) GetTx() int64 { return atomic.LoadInt64(v.tx) }
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func (v *Valve) Nullify() (int64, int64) {
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rx := atomic.SwapInt64(v.rx, 0)
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tx := atomic.SwapInt64(v.tx, 0)
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return rx, tx
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}
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