status-go/vendor/github.com/anacrolix/upnp/registry.go

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2022-03-10 09:44:48 +00:00
// 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 upnp
import (
"sync"
"time"
"github.com/anacrolix/log"
)
type DiscoverFunc func(renewal, timeout time.Duration, _ log.Logger) []Device
var providers []DiscoverFunc
func Register(provider DiscoverFunc) {
providers = append(providers, provider)
}
func discoverAll(renewal, timeout time.Duration, ll levelLogger) map[string]Device {
wg := &sync.WaitGroup{}
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, ll.Logger) {
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
}