1 // 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 //go:build aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris || zos 6 // +build aix darwin dragonfly freebsd linux netbsd openbsd solaris zos 7 8 package unix 9 10 // Set adds fd to the set fds. 11 func (fds *FdSet) Set(fd int) { 12 fds.Bits[fd/NFDBITS] |= (1 << (uintptr(fd) % NFDBITS)) 13 } 14 15 // Clear removes fd from the set fds. 16 func (fds *FdSet) Clear(fd int) { 17 fds.Bits[fd/NFDBITS] &^= (1 << (uintptr(fd) % NFDBITS)) 18 } 19 20 // IsSet returns whether fd is in the set fds. 21 func (fds *FdSet) IsSet(fd int) bool { 22 return fds.Bits[fd/NFDBITS]&(1<<(uintptr(fd)%NFDBITS)) != 0 23 } 24 25 // Zero clears the set fds. 26 func (fds *FdSet) Zero() { 27 for i := range fds.Bits { 28 fds.Bits[i] = 0 29 } 30 } 31