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// +build !windows,!appengine package maxminddb import ( "golang.org/x/sys/unix" ) func mmap(fd int, length int) (data []byte, err error) { return unix.Mmap(fd, 0, length, unix.PROT_READ, unix.MAP_SHARED) } func munmap(b []byte) (err error) { return unix.Munmap(b) }