You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
45 lines
788 B
45 lines
788 B
package broadcast
|
|
|
|
import (
|
|
"sync"
|
|
)
|
|
|
|
type Broadcast struct {
|
|
channels []chan interface{}
|
|
channelLock sync.Mutex
|
|
}
|
|
|
|
func (b *Broadcast) Subscribe() chan interface{} {
|
|
b.channelLock.Lock()
|
|
defer b.channelLock.Unlock()
|
|
newChannel := make(chan interface{})
|
|
b.channels = append(b.channels, newChannel)
|
|
return newChannel
|
|
}
|
|
|
|
func (b *Broadcast) WaitNext() interface{} {
|
|
return <-b.Subscribe()
|
|
}
|
|
|
|
func (b *Broadcast) Send(value interface{}) {
|
|
wg := sync.WaitGroup{}
|
|
|
|
b.channelLock.Lock()
|
|
|
|
for _, channel := range b.channels {
|
|
wg.Add(1)
|
|
//Do not use closure as reference will change
|
|
go func(thisChannel chan<- interface{}) {
|
|
thisChannel <- value
|
|
wg.Done()
|
|
}(channel)
|
|
}
|
|
|
|
b.channelLock.Unlock()
|
|
|
|
wg.Wait()
|
|
}
|
|
|
|
func (b *Broadcast) Count() int {
|
|
return len(b.channels)
|
|
}
|
|
|