adam-gui/vendor/github.com/creack/goselect/fdset.go
2024-04-29 19:13:50 +02:00

34 lines
730 B
Go

// +build !freebsd,!windows,!plan9
package goselect
import "syscall"
const FD_SETSIZE = syscall.FD_SETSIZE
// FDSet wraps syscall.FdSet with convenience methods
type FDSet syscall.FdSet
// Set adds the fd to the set
func (fds *FDSet) Set(fd uintptr) {
fds.Bits[fd/NFDBITS] |= (1 << (fd % NFDBITS))
}
// Clear remove the fd from the set
func (fds *FDSet) Clear(fd uintptr) {
fds.Bits[fd/NFDBITS] &^= (1 << (fd % NFDBITS))
}
// IsSet check if the given fd is set
func (fds *FDSet) IsSet(fd uintptr) bool {
return fds.Bits[fd/NFDBITS]&(1<<(fd%NFDBITS)) != 0
}
// Keep a null set to avoid reinstatiation
var nullFdSet = &FDSet{}
// Zero empties the Set
func (fds *FDSet) Zero() {
copy(fds.Bits[:], (nullFdSet).Bits[:])
}