syncthing/lib/nat/registry.go
2017-02-09 08:04:16 +01:00

54 lines
1013 B
Go

// Copyright (C) 2015 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at https://mozilla.org/MPL/2.0/.
package nat
import (
"time"
"github.com/syncthing/syncthing/lib/sync"
)
type DiscoverFunc func(renewal, timeout time.Duration) []Device
var providers []DiscoverFunc
func Register(provider DiscoverFunc) {
providers = append(providers, provider)
}
func discoverAll(renewal, timeout time.Duration) map[string]Device {
wg := sync.NewWaitGroup()
wg.Add(len(providers))
c := make(chan Device)
done := make(chan struct{})
for _, discoverFunc := range providers {
go func(f DiscoverFunc) {
for _, dev := range f(renewal, timeout) {
c <- dev
}
wg.Done()
}(discoverFunc)
}
nats := make(map[string]Device)
go func() {
for dev := range c {
nats[dev.ID()] = dev
}
close(done)
}()
wg.Wait()
close(c)
<-done
return nats
}