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ac3223d801
Add Set, Clear, IsSet and Zero methods to manipulate an *FdSet. These implement the same functionality as the FD_SET, FD_CLR, FD_ISSET and FD_ZERO macros in <sys/select.h>. Change-Id: I6b7bccb98e58ee5e719096ed5743f6edcd232840 Reviewed-on: https://go-review.googlesource.com/c/sys/+/205397 Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org>
30 lines
752 B
Go
30 lines
752 B
Go
// Copyright 2019 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris
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package unix
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// Set adds fd to the set fds.
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func (fds *FdSet) Set(fd int) {
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fds.Bits[fd/NFDBITS] |= (1 << (uintptr(fd) % NFDBITS))
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}
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// Clear removes fd from the set fds.
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func (fds *FdSet) Clear(fd int) {
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fds.Bits[fd/NFDBITS] &^= (1 << (uintptr(fd) % NFDBITS))
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}
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// IsSet returns whether fd is in the set fds.
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func (fds *FdSet) IsSet(fd int) bool {
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return fds.Bits[fd/NFDBITS]&(1<<(uintptr(fd)%NFDBITS)) != 0
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}
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// Zero clears the set fds.
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func (fds *FdSet) Zero() {
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for i := range fds.Bits {
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fds.Bits[i] = 0
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}
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}
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