1// Copyright 2023 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5//go:build wasip1
6
7package unix
8
9import (
10	"syscall"
11	_ "unsafe" // for go:linkname
12)
13
14func IsNonblock(fd int) (nonblocking bool, err error) {
15	flags, e1 := fd_fdstat_get_flags(fd)
16	if e1 != nil {
17		return false, e1
18	}
19	return flags&syscall.FDFLAG_NONBLOCK != 0, nil
20}
21
22func HasNonblockFlag(flag int) bool {
23	return flag&syscall.FDFLAG_NONBLOCK != 0
24}
25
26// This helper is implemented in the syscall package. It means we don't have
27// to redefine the fd_fdstat_get host import or the fdstat struct it
28// populates.
29//
30//go:linkname fd_fdstat_get_flags syscall.fd_fdstat_get_flags
31func fd_fdstat_get_flags(fd int) (uint32, error)
32