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/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package device
import "sync"
// An outboundQueue is a channel of QueueOutboundElements awaiting encryption.
// An outboundQueue is ref-counted using its wg field.
// An outboundQueue created with newOutboundQueue has one reference.
// Every additional writer must call wg.Add(1).
// Every completed writer must call wg.Done().
// When no further writers will be added,
// call wg.Done to remove the initial reference.
// When the refcount hits 0, the queue's channel is closed.
type outboundQueue struct {
c chan *QueueOutboundElement
wg sync.WaitGroup
}
func newOutboundQueue() *outboundQueue {
q := &outboundQueue{
c: make(chan *QueueOutboundElement, QueueOutboundSize),
}
q.wg.Add(1)
go func() {
q.wg.Wait()
close(q.c)
}()
return q
}
// A inboundQueue is similar to an outboundQueue; see those docs.
type inboundQueue struct {
c chan *QueueInboundElement
wg sync.WaitGroup
}
func newInboundQueue() *inboundQueue {
q := &inboundQueue{
c: make(chan *QueueInboundElement, QueueInboundSize),
}
q.wg.Add(1)
go func() {
q.wg.Wait()
close(q.c)
}()
return q
}
// A handshakeQueue is similar to an outboundQueue; see those docs.
type handshakeQueue struct {
c chan QueueHandshakeElement
wg sync.WaitGroup
}
func newHandshakeQueue() *handshakeQueue {
q := &handshakeQueue{
c: make(chan QueueHandshakeElement, QueueHandshakeSize),
}
q.wg.Add(1)
go func() {
q.wg.Wait()
close(q.c)
}()
return q
}
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