mirror of
https://github.com/octoleo/syncthing.git
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110 lines
2.0 KiB
Go
110 lines
2.0 KiB
Go
// Copyright (C) 2014 The Syncthing Authors.
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this file,
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// You can obtain one at http://mozilla.org/MPL/2.0/.
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//go:generate -command genxdr go run ../../vendor/github.com/calmh/xdr/cmd/genxdr/main.go
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//go:generate genxdr -o leveldb_xdr.go leveldb.go
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package db
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import (
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"bytes"
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"fmt"
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"github.com/syncthing/syncthing/lib/protocol"
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"github.com/syncthing/syncthing/lib/sync"
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"github.com/syndtr/goleveldb/leveldb"
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"github.com/syndtr/goleveldb/leveldb/opt"
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)
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var (
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clockTick int64
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clockMut = sync.NewMutex()
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)
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func clock(v int64) int64 {
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clockMut.Lock()
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defer clockMut.Unlock()
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if v > clockTick {
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clockTick = v + 1
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} else {
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clockTick++
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}
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return clockTick
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}
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const (
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KeyTypeDevice = iota
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KeyTypeGlobal
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KeyTypeBlock
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KeyTypeDeviceStatistic
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KeyTypeFolderStatistic
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KeyTypeVirtualMtime
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KeyTypeFolderIdx
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KeyTypeDeviceIdx
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)
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type fileVersion struct {
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version protocol.Vector
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device []byte
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}
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type versionList struct {
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versions []fileVersion
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}
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func (l versionList) String() string {
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var b bytes.Buffer
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var id protocol.DeviceID
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b.WriteString("{")
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for i, v := range l.versions {
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if i > 0 {
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b.WriteString(", ")
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}
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copy(id[:], v.device)
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fmt.Fprintf(&b, "{%d, %v}", v.version, id)
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}
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b.WriteString("}")
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return b.String()
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}
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type fileList []protocol.FileInfo
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func (l fileList) Len() int {
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return len(l)
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}
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func (l fileList) Swap(a, b int) {
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l[a], l[b] = l[b], l[a]
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}
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func (l fileList) Less(a, b int) bool {
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return l[a].Name < l[b].Name
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}
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type dbReader interface {
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Get([]byte, *opt.ReadOptions) ([]byte, error)
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}
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// Flush batches to disk when they contain this many records.
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const batchFlushSize = 64
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func getFile(db dbReader, key []byte) (protocol.FileInfo, bool) {
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bs, err := db.Get(key, nil)
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if err == leveldb.ErrNotFound {
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return protocol.FileInfo{}, false
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}
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if err != nil {
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panic(err)
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}
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var f protocol.FileInfo
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err = f.UnmarshalXDR(bs)
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if err != nil {
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panic(err)
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}
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return f, true
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}
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