package common

import "sync"

type Condition interface {
	Wait()
	Notify()
	NotifyAll()
}

type condition struct {
	sync.Mutex
	c *sync.Cond
}

func NewCond() Condition {
	c := new(condition)
	c.c = sync.NewCond(c)
	return c
}
func (c *condition) Wait() {
	c.Lock()
	defer c.Unlock()
	c.c.Wait()
}
func (c *condition) Notify() {
	c.c.Signal()
}
func (c *condition) NotifyAll() {
	c.c.Broadcast()
}