107 lines
2.6 KiB
Go
107 lines
2.6 KiB
Go
// https://www.digitalocean.com/community/tutorials/how-to-run-multiple-functions-concurrently-in-go
|
|
// who came up with the idea of making community tutorials. that was a good idea!
|
|
|
|
package gui
|
|
|
|
import (
|
|
"fmt"
|
|
"sync"
|
|
)
|
|
|
|
var debugWG *sync.WaitGroup
|
|
var debugNumberChan chan int
|
|
|
|
func (n *Node) DebugGoChannels(makeWindow bool) {
|
|
var w, g *Node
|
|
|
|
// Either:
|
|
// make a new window
|
|
// make a new tab in the existing window
|
|
if (makeWindow) {
|
|
Config.Title = "Debug GO Channels"
|
|
Config.Width = 300
|
|
Config.Height = 400
|
|
w = NewWindow()
|
|
w.Custom = w.StandardClose
|
|
} else {
|
|
w = n.NewTab("Chan")
|
|
}
|
|
|
|
g = w.NewGroup("Channel stuff")
|
|
|
|
// var debugWG sync.WaitGroup
|
|
g.NewButton("init()", func () {
|
|
if (debugNumberChan == nil) {
|
|
log("making debugNumberChan channel")
|
|
debugNumberChan = make(chan int)
|
|
} else {
|
|
log("debugNumberChan already made")
|
|
}
|
|
debugWG = new(sync.WaitGroup)
|
|
})
|
|
g.NewButton("go printInt(x) (read x values off the channel)", func () {
|
|
debugWG.Add(1)
|
|
go printInt(2, "routine1")
|
|
debugWG.Add(1)
|
|
go printInt(2, "routine2")
|
|
})
|
|
g.NewButton("sendNumber(2) (chan <- 2, 4)", func () {
|
|
debugWG.Add(1)
|
|
debugWG.Add(1)
|
|
go sendNumber(2)
|
|
go sendNumber(4)
|
|
})
|
|
g.NewButton("sendNumber(1) (chan <- 7)", func () {
|
|
debugWG.Add(1)
|
|
go sendNumber(7)
|
|
})
|
|
g.NewButton("send 4 numbers (chan <- int)", func () {
|
|
log("generateNumbers(4)")
|
|
go generateNumbers(4)
|
|
})
|
|
g.NewButton("debugWG.Done()", func () {
|
|
log("ran debugWG.Done()")
|
|
debugWG.Done()
|
|
})
|
|
g.NewButton("close chan", func () {
|
|
close(debugNumberChan)
|
|
})
|
|
g.NewButton("print", func () {
|
|
log("waitgroup counter is ?")
|
|
})
|
|
}
|
|
func sendNumber(i int) {
|
|
log("START debugNumberChan <-", i, " (sending", i, "to channel)")
|
|
debugNumberChan <- i
|
|
debugWG.Wait()
|
|
log("END debugNumberChan sendNumber() done", i)
|
|
}
|
|
|
|
func generateNumbers(total int) {
|
|
fmt.Printf("START generateNumbers()\n")
|
|
for idx := 1; idx <= total; idx++ {
|
|
log("ran debugNumberChan <= idx where idx =", idx)
|
|
fmt.Printf("S generateNumbers() sending %d to channel\n", idx)
|
|
debugNumberChan <- idx
|
|
// res, err := (<-r)()
|
|
fmt.Printf("E generateNumbers() sending %d to channel\n", idx)
|
|
}
|
|
debugWG.Wait()
|
|
fmt.Printf("END generateNumbers()\n")
|
|
}
|
|
|
|
// i equals the number of times to read values from the channel
|
|
func printInt(i int, name string) {
|
|
tmp := 1
|
|
log("START printInt", name, "read debugNumberChan()")
|
|
for num := range debugNumberChan {
|
|
log("printInt()",name, "read", num, "from channel")
|
|
debugWG.Done()
|
|
if (tmp == i) {
|
|
return
|
|
}
|
|
tmp += 1
|
|
}
|
|
fmt.Printf("END printInt()", name, "read debugNumberChan\n")
|
|
}
|