//
// On Windows it wraps os.Rename, which (as of 2019-06-04) uses MoveFileEx with
// MOVEFILE_REPLACE_EXISTING.
//
// Windows also provides a different system call, ReplaceFile,
// that provides similar semantics, but perhaps preserves more metadata. (The
// documentation on the differences between the two is very sparse.)
//
// Empirical error rates with MoveFileEx are lower under modest concurrency, so

//sys	GetComputerNameEx(nameformat uint32, buf *uint16, n *uint32) (err error) = GetComputerNameExW
//sys	MoveFileEx(from *uint16, to *uint16, flags uint32) (err error) = MoveFileExW
//sys	GetModuleFileName(module syscall.Handle, fn *uint16, len uint32) (n uint32, err error) = kernel32.GetModuleFileNameW

	r1, _, e1 := syscall.Syscall(procModule32NextW.Addr(), 2, uintptr(snapshot), uintptr(unsafe.Pointer(moduleEntry)), 0)
	if r1 == 0 {
		err = errnoErr(e1)
	}
	return
}

func MoveFileEx(from *uint16, to *uint16, flags uint32) (err error) {
	r1, _, e1 := syscall.Syscall(procMoveFileExW.Addr(), 3, uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(to)), uintptr(flags))
	if r1 == 0 {
		err = errnoErr(e1)

//sys	RemoveDirectory(path *uint16) (err error) = RemoveDirectoryW
//sys	DeleteFile(path *uint16) (err error) = DeleteFileW
//sys	MoveFile(from *uint16, to *uint16) (err error) = MoveFileW
//sys	MoveFileEx(from *uint16, to *uint16, flags uint32) (err error) = MoveFileExW
//sys	LockFileEx(file Handle, flags uint32, reserved uint32, bytesLow uint32, bytesHigh uint32, overlapped *Overlapped) (err error)

	r1, _, e1 := syscall.Syscall(procModule32NextW.Addr(), 2, uintptr(snapshot), uintptr(unsafe.Pointer(moduleEntry)), 0)
	if r1 == 0 {
		err = errnoErr(e1)
	}
	return
}

func MoveFileEx(from *uint16, to *uint16, flags uint32) (err error) {
	r1, _, e1 := syscall.Syscall(procMoveFileExW.Addr(), 3, uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(to)), uintptr(flags))
	if r1 == 0 {
		err = errnoErr(e1)