//go:build !windows && !plan9

package singleinstance

import (
	"os"
	"syscall"
)

func flockExclusive(f *os.File) error {
	return syscall.Flock(int(f.Fd()), syscall.LOCK_EX|syscall.LOCK_NB)
}

func funlock(f *os.File) error {
	return syscall.Flock(int(f.Fd()), syscall.LOCK_UN)
}