package wsconn

import (
	"container/list"
	"sync"
)

// clientList is a list of clients
type clientList struct {
	mu   sync.RWMutex
	list *list.List
}

// newClientList creates a empty list for storing clients
func newClientList() *clientList {
	return &clientList{list: list.New()}
}

// Add appends a client to the list
func (l *clientList) Add(c *client) {
	l.mu.Lock()
	l.list.PushBack(c)
	l.mu.Unlock()
}

// Remove a client from the list
func (l *clientList) Remove(c *client) {
	l.mu.Lock()
	for e := l.list.Front(); e != nil; e = e.Next() {
		if e.Value != c {
			continue
		}
		l.list.Remove(e)
		break
	}
	l.mu.Unlock()
}

// RLock locks the list for read access
func (l *clientList) RLock() {
	l.mu.RLock()
}

// RUnlock unlocks the list from read access
func (l *clientList) RUnlock() {
	l.mu.RUnlock()
}