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event_loop.go
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event_loop.go
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package znet
import (
"context"
"net"
"runtime"
)
type EventLoop interface {
Serve(listener net.Listener) error
Shutdown(ctx context.Context) error
}
func NewEventLoop(eh EventHandler, opts ...Option) EventLoop {
o := new(options)
for _, opt := range opts {
opt(o)
}
return &eventLoop{
o: o,
stop: make(chan error, 1),
eh: eh,
}
}
type eventLoop struct {
o *options
s *server
stop chan error
eh EventHandler
}
func (e *eventLoop) Serve(netListener net.Listener) error {
l, err := ConvertListener(netListener)
if err != nil {
return err
}
e.s = newServer(l, e.eh, e.o)
e.s.Run()
err = e.waitQuit()
// ensure evl will not be finalized until Serve returns
runtime.SetFinalizer(e, nil)
return err
}
// Shutdown signals a shutdown a begins server closing.
func (evl *eventLoop) Shutdown(ctx context.Context) error {
//evl.Lock()
//var svr = evl.svr
//evl.svr = nil
//evl.Unlock()
//
//if svr == nil {
// return nil
//}
evl.quit(nil)
return evl.s.Close(ctx)
}
// waitQuit waits for a quit signal
func (evl *eventLoop) waitQuit() error {
return <-evl.stop
}
func (evl *eventLoop) quit(err error) {
select {
case evl.stop <- err:
default:
}
}