blob: 10a2d9b3acea7c2ff9fec270109351bbc8ea9792 [file] [log] [blame]
// Copyright 2016 The LUCI Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// +build windows
package main
import (
"os"
"syscall"
"unsafe"
)
func interruptSignals() []os.Signal {
return []os.Signal{os.Interrupt}
}
// See https://msdn.microsoft.com/en-us/library/windows/desktop/aa365240(v=vs.85).aspx
var (
kernel32 = syscall.NewLazyDLL("kernel32.dll")
procMoveFileExW = kernel32.NewProc("MoveFileExW")
)
const (
moveFileReplaceExisting = 1
moveFileWriteThrough = 8
)
func moveFileEx(source, target *uint16, flags uint32) error {
ret, _, err := procMoveFileExW.Call(uintptr(unsafe.Pointer(source)), uintptr(unsafe.Pointer(target)), uintptr(flags))
if ret == 0 {
if err != nil {
return err
}
return syscall.EINVAL
}
return nil
}
func atomicRename(source, target string) error {
lpReplacedFileName, err := syscall.UTF16PtrFromString(target)
if err != nil {
return err
}
lpReplacementFileName, err := syscall.UTF16PtrFromString(source)
if err != nil {
return err
}
return moveFileEx(lpReplacementFileName, lpReplacedFileName, moveFileReplaceExisting|moveFileWriteThrough)
}