Hilbish/timer.go

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package main
import (
"errors"
"fmt"
"os"
"time"
"hilbish/util"
rt "github.com/arnodel/golua/runtime"
)
type timerType int64
const (
timerInterval timerType = iota
timerTimeout
)
type timer struct{
id int
typ timerType
running bool
dur time.Duration
fun *rt.Closure
th *timerHandler
ticker *time.Ticker
channel chan bool
}
func (t *timer) start() error {
if t.running {
return errors.New("timer is already running")
}
t.running = true
t.th.running++
t.ticker = time.NewTicker(t.dur)
go func() {
for {
select {
case <-t.ticker.C:
_, err := rt.Call1(l.MainThread(), rt.FunctionValue(t.fun))
if err != nil {
fmt.Fprintln(os.Stderr, "Error in function:\n", err)
t.stop()
}
// only run one for timeout
if t.typ == timerTimeout {
t.stop()
}
case <-t.channel:
t.ticker.Stop()
return
}
}
}()
return nil
}
func (t *timer) stop() error {
if !t.running {
return errors.New("timer not running")
}
t.channel <- true
t.running = false
t.th.running--
return nil
}
func (t *timer) luaStart(thr *rt.Thread, c *rt.GoCont) (rt.Cont, error) {
err := t.start()
if err != nil {
return nil, err
}
return c.Next(), nil
}
func (t *timer) luaStop(thr *rt.Thread, c *rt.GoCont) (rt.Cont, error) {
err := t.stop()
if err != nil {
return nil, err
}
return c.Next(), nil
}
func (t *timer) lua() rt.Value {
tExports := map[string]util.LuaExport{
"start": {t.luaStart, 0, false},
"stop": {t.luaStop, 0, false},
}
luaTimer := rt.NewTable()
util.SetExports(l, luaTimer, tExports)
luaTimer.Set(rt.StringValue("type"), rt.IntValue(int64(t.typ)))
luaTimer.Set(rt.StringValue("running"), rt.BoolValue(t.running))
luaTimer.Set(rt.StringValue("duration"), rt.IntValue(int64(t.dur / time.Millisecond)))
return rt.TableValue(luaTimer)
}