xjasonlyu/tun2socks

package observable

import (
    "sync"
)

type Subscription <-chan any

type Subscriber struct {
    buffer chan any
    once   sync.Once
}

func (s *Subscriber) Emit(item any) {
    s.buffer <- item
}

func (s *Subscriber) Out() Subscription {
    return s.buffer
}

func (s *Subscriber) Close() {
    s.once.Do(func() {
        close(s.buffer)
    })
}

func newSubscriber() *Subscriber {
    sub := &Subscriber{
        buffer: make(chan any, 200),
    }
    return sub
}