mirror of
https://github.com/go-sylixos/elvish.git
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47 lines
731 B
Go
47 lines
731 B
Go
// +build !freebsd,!windows,!plan9
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package sys
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import (
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"unsafe"
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"golang.org/x/sys/unix"
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)
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var nFdBits = uint(8 * unsafe.Sizeof(unix.FdSet{}.Bits[0]))
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type FdSet unix.FdSet
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func (fs *FdSet) s() *unix.FdSet {
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return (*unix.FdSet)(fs)
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}
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func NewFdSet(fds ...int) *FdSet {
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fs := &FdSet{}
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fs.Set(fds...)
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return fs
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}
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func (fs *FdSet) Clear(fds ...int) {
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for _, fd := range fds {
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u := uint(fd)
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fs.Bits[u/nFdBits] &= ^(1 << (u % nFdBits))
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}
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}
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func (fs *FdSet) IsSet(fd int) bool {
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u := uint(fd)
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return fs.Bits[u/nFdBits]&(1<<(u%nFdBits)) != 0
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}
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func (fs *FdSet) Set(fds ...int) {
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for _, fd := range fds {
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u := uint(fd)
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fs.Bits[u/nFdBits] |= 1 << (u % nFdBits)
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}
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}
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func (fs *FdSet) Zero() {
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*fs = FdSet{}
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}
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