rwmanager.go

// Copyright 2019 The nutsdb Author. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package nutsdb

// RWMode represents the read and write mode.
type RWMode int

const (
	// FileIO represents the read and write mode using standard I/O.
	FileIO RWMode = iota

	// MMap represents the read and write mode using mmap.
	MMap
)

// RWManager represents an interface to a RWManager.
type RWManager interface {
	WriteAt(b []byte, off int64) (n int, err error)
	ReadAt(b []byte, off int64) (n int, err error)
	Sync() (err error)
	Release() (err error)
	Size() int64
	Close() (err error)
}