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