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// Copyright (C) 2019-2024 Algorand, Inc.
// This file is part of go-algorand
//
// go-algorand is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// go-algorand is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with go-algorand. If not, see <https://www.gnu.org/licenses/>.
package db
// Pair represents two accessors - read and write
type Pair struct {
Rdb Accessor
Wdb Accessor
}
// Close the read and write accessors
func (p Pair) Close() {
if p.Rdb.Handle != nil {
p.Rdb.Close()
}
if p.Wdb.Handle != nil {
p.Wdb.Close()
}
}
// OpenPair opens the filename with both reading and writing accessors.
func OpenPair(filename string, memory bool) (p Pair, err error) {
p.Rdb, err = MakeAccessor(filename, true, memory)
if err != nil {
return
}
p.Wdb, err = MakeAccessor(filename, false, memory)
if err != nil {
p.Rdb.Close()
return
}
return
}
// OpenErasablePair opens the filename with both reading and writing accessors
// with the secure_delete pragma set, using MakeErasableAccessor.
func OpenErasablePair(filename string) (p Pair, err error) {
p.Rdb, err = makeErasableAccessor(filename, true)
if err != nil {
return
}
p.Wdb, err = makeErasableAccessor(filename, false)
if err != nil {
p.Rdb.Close()
return
}
return
}
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