// Close the database.
//
// This flushes all write operations to the database.
//
// This is called automaticly on garbage collection.
// Note that teminating the program does not call the garbage collector.
func (db *Db) Close() {
db.lock.Lock()
defer db.lock.Unlock()
if db.opened {
// Collect all the keys before starting to close, because closing will change the hash
keys := make([]uint64, 0, len(db.queries))
for key := range db.queries {
keys = append(keys, key)
}
for _, key := range keys {
db.queries[key].Close()
}
C.c_dbxml_free(db.db)
db.opened = false
}
}
// Open a database.
//
// Call db.Close() to ensure all write operations to the database are finished, before terminating the program.
func Open(filename string) (*Db, error) {
db := &Db{
queries: make(map[uint64]*Query),
}
cs := C.CString(filename)
defer C.free(unsafe.Pointer(cs))
db.db = C.c_dbxml_open(cs)
if C.c_dbxml_error(db.db) != 0 {
err := errors.New(C.GoString(C.c_dbxml_errstring(db.db)))
C.c_dbxml_free(db.db)
return db, err
}
db.opened = true
runtime.SetFinalizer(db, (*Db).Close)
return db, nil
}