/
sched_co.go
64 lines (50 loc) · 958 Bytes
/
sched_co.go
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//go:build co
//go:generate go install github.com/goghcrow/go-co/cmd/cogen@main
//go:generate cogen
package sched
import (
"sync"
. "github.com/goghcrow/go-co"
)
// Async interface { Begin(Continuation) }
// type AsyncFun func(Continuation)
// func (f AsyncFun) Begin(k Continuation) { f(k) }
type (
Continuation func(v any, err error)
Async func(Continuation)
Sched struct {
val any
err error
}
)
func Co(co func(s *Sched) Iter[Async]) {
sched := &Sched{}
sched.run(co)
}
var wg = &sync.WaitGroup{}
func DeferMain() {
wg.Wait()
}
func (s *Sched) run(co func(s *Sched) Iter[Async]) {
it := co(s)
var recur func()
recur = func() {
if it.MoveNext() {
it.Current()(func(v any, err error) {
s.Send(v, err)
recur()
})
return
}
wg.Done()
}
wg.Add(1)
recur()
}
func (s *Sched) Send(v any, err error) {
s.val = v
s.err = err
}
func (s *Sched) GetReceive() (any, error) {
return s.val, s.err
}