59 lines
1.1 KiB
Go
59 lines
1.1 KiB
Go
// https://www.digitalocean.com/community/tutorials/how-to-run-multiple-functions-concurrently-in-go
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// who came up with the idea of making community tutorials. that was a good idea! (ya, that was me and Etel)
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package main
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import (
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"fmt"
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"sync"
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)
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var wg sync.WaitGroup
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var functionChan chan func (*sync.WaitGroup)
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type funcWait struct {
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f func()
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wgF sync.WaitGroup
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err error
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res int
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}
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func generateNumbers(total int, ch chan<- func (), wg *sync.WaitGroup) {
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defer wg.Done()
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fmt.Printf("sending %d to channel\n", total)
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ch <- func() {
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fmt.Printf("inside f() sending %d to channel\n", total)
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}
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}
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func andlabsGoroutine(ch <-chan func(), wg *sync.WaitGroup) {
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defer wg.Done()
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for f := range ch {
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fmt.Printf("read f() from channel\n")
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f()
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}
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}
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func main() {
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functionChan = make(chan func(*sync.WaitGroup))
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r := make(chan func() (int, error))
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res, err = (<-r)()
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wg.Add(1)
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go andlabsGoroutine(functionChan, &wg)
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for idx := 1; idx <= total; idx++ {
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generateNumbers(idx, functionChan, &wg)
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}
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close(functionChan)
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fmt.Println("Waiting for goroutines to finish...")
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wg.Wait()
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fmt.Println("Done!")
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}
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