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 7 package unix 8 9 // Set adds fd to the set fds. 10 func (fds *FdSet) Set(fd int) { 11 fds.Bits[fd/NFDBITS] |= (1 << (uintptr(fd) % NFDBITS)) 12 } 13 14 // Clear removes fd from the set fds. 15 func (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. 20 func (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. 25 func (fds *FdSet) Zero() { 26 for i := range fds.Bits { 27 fds.Bits[i] = 0 28 } 29 } 30