blob: b27be0a014c9f0521233276ea3d3e38701e51e5d [file] [log] [blame]
Matteo Scandoloa4285862020-12-01 18:10:10 -08001// Copyright 2019 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// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris
6
7package unix
8
9// Set adds fd to the set fds.
10func (fds *FdSet) Set(fd int) {
11 fds.Bits[fd/NFDBITS] |= (1 << (uintptr(fd) % NFDBITS))
12}
13
14// Clear removes fd from the set fds.
15func (fds *FdSet) Clear(fd int) {
16 fds.Bits[fd/NFDBITS] &^= (1 << (uintptr(fd) % NFDBITS))
17}
18
19// IsSet returns whether fd is in the set fds.
20func (fds *FdSet) IsSet(fd int) bool {
21 return fds.Bits[fd/NFDBITS]&(1<<(uintptr(fd)%NFDBITS)) != 0
22}
23
24// Zero clears the set fds.
25func (fds *FdSet) Zero() {
26 for i := range fds.Bits {
27 fds.Bits[i] = 0
28 }
29}