func asBuckets(f *shm.File) ([]bucket, gommap.MMap, error) {
arr, mmap, err := shm.MMapTyped(f, bucket{})
if err != nil {
return nil, nil, err
}
buckets, ok := arr.([]bucket)
if !ok {
panic("failed to cast []byte to []bucket")
}
return buckets, mmap, nil
}
func Open(name string) (Table, error) {
f, err := shm.Open(name, os.O_RDWR)
if err != nil {
return nil, err
}
arr, mmap, err := shm.MMapTyped(f, entry{})
if err != nil {
return nil, err
}
entries, ok := arr.([]entry)
if !ok {
panic("failed to cast []byte to []entry")
}
return &table{
f: f,
entries: entries,
mmap: mmap,
}, nil
}