wireguard-go/rwcancel/fdset.go

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2019-01-02 00:55:51 +00:00
/* SPDX-License-Identifier: MIT
*
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* Copyright (C) 2017-2019 WireGuard LLC. All Rights Reserved.
*/
package rwcancel
import "golang.org/x/sys/unix"
type fdSet struct {
fdset unix.FdSet
}
func (fdset *fdSet) set(i int) {
bits := 32 << (^uint(0) >> 63)
fdset.fdset.Bits[i/bits] |= 1 << uint(i%bits)
}
func (fdset *fdSet) check(i int) bool {
bits := 32 << (^uint(0) >> 63)
return (fdset.fdset.Bits[i/bits] & (1 << uint(i%bits))) != 0
}