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// This code is based on the hub.go code of the Gorilla WebSocket:
//
// Copyright 2013 The Gorilla WebSocket Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license:
// Copyright (c) 2013 The Gorilla WebSocket Authors. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
//
// Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
package mpvipc
// Hub maintains the set of active EventListeners and broadcasts
// messages to them.
type Hub struct {
// Registered EventListeners.
listeners map[*EventListener]bool
// Inbound Event messages
broadcast chan *Event
// Register requests from the EventListeners.
register chan *EventListener
// Unregister requests from EventListeners.
unregister chan *EventListener
}
func newHub() *Hub {
return &Hub{
broadcast: make(chan *Event),
register: make(chan *EventListener),
unregister: make(chan *EventListener),
listeners: make(map[*EventListener]bool),
}
}
func (h *Hub) run() {
for {
select {
case listener := <-h.register:
h.listeners[listener] = true
case listener := <-h.unregister:
if _, ok := h.listeners[listener]; ok {
delete(h.listeners, listener)
close(listener.send)
}
case message := <-h.broadcast:
for listener := range h.listeners {
listener.send <- message
}
}
}
}
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