forked from getlantern/lantern
/
event.go
48 lines (40 loc) · 994 Bytes
/
event.go
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// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build windows
package svc
import (
"code.google.com/p/winsvc/winapi"
"errors"
"syscall"
)
// event represents auto-reset, initially non-signaled windows event.
// It is used to communicate between go and asm parts of this package.
type event struct {
h syscall.Handle
}
func newEvent() (*event, error) {
h, err := winapi.CreateEvent(nil, 0, 0, nil)
if err != nil {
return nil, err
}
return &event{h: h}, nil
}
func (e *event) Close() error {
return syscall.CloseHandle(e.h)
}
func (e *event) Set() error {
return winapi.SetEvent(e.h)
}
func (e *event) Wait() error {
s, err := syscall.WaitForSingleObject(e.h, syscall.INFINITE)
switch s {
case syscall.WAIT_OBJECT_0:
break
case syscall.WAIT_FAILED:
return err
default:
return errors.New("unexpected result from WaitForSingleObject")
}
return nil
}