97 lines
2.5 KiB
Go
97 lines
2.5 KiB
Go
// Mgmt
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// Copyright (C) 2013-2016+ James Shubin and the project contributors
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// Written by James Shubin <james@shubin.ca> and the project contributors
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package main
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//go:generate stringer -type=eventName -output=eventname_stringer.go
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type eventName int
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const (
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eventNil eventName = iota
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eventExit
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eventStart
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eventPause
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eventPoke
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eventBackPoke
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)
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// Resp is a channel to be used for boolean responses.
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type Resp chan bool
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// Event is the main struct that stores event information and responses.
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type Event struct {
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Name eventName
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Resp Resp // channel to send an ack response on, nil to skip
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//Wg *sync.WaitGroup // receiver barrier to Wait() for everyone else on
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Msg string // some words for fun
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Activity bool // did something interesting happen?
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}
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// ACK sends a single acknowledgement on the channel if one was requested.
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func (event *Event) ACK() {
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if event.Resp != nil { // if they've requested an ACK
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event.Resp.ACK()
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}
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}
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// NACK sends a negative acknowledgement message on the channel if one was requested.
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func (event *Event) NACK() {
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if event.Resp != nil { // if they've requested a NACK
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event.Resp.NACK()
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}
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}
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// NewResp is just a helper to return the right type of response channel.
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func NewResp() Resp {
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resp := make(chan bool)
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return resp
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}
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// ACK sends a true value to resp.
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func (resp Resp) ACK() {
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if resp != nil {
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resp <- true
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}
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}
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// NACK sends a false value to resp.
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func (resp Resp) NACK() {
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if resp != nil {
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resp <- false
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}
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}
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// Wait waits for any response from a Resp channel and returns it.
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func (resp Resp) Wait() bool {
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return <-resp
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}
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// ACKWait waits for a +ive Ack from a Resp channel.
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func (resp Resp) ACKWait() {
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for {
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// wait until true value
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if resp.Wait() {
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return
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}
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}
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}
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// GetActivity returns the activity value.
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func (event *Event) GetActivity() bool {
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return event.Activity
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}
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