87 lines
1.7 KiB
Go
87 lines
1.7 KiB
Go
//go:build cgo
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// +build cgo
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package sqliteStorage
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import (
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"io"
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"crawshaw.io/sqlite"
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"github.com/anacrolix/squirrel"
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"github.com/anacrolix/torrent/metainfo"
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"github.com/anacrolix/torrent/storage"
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)
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// A convenience function that creates a connection pool, resource provider, and a pieces storage
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// ClientImpl and returns them all with a Close attached.
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func NewDirectStorage(opts NewDirectStorageOpts) (_ storage.ClientImplCloser, err error) {
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cache, err := squirrel.NewCache(opts)
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if err != nil {
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return
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}
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return &client{
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cache,
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cache.GetCapacity,
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}, nil
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}
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func NewWrappingClient(cache *squirrel.Cache) storage.ClientImpl {
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return &client{
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cache,
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cache.GetCapacity,
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}
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}
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type client struct {
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*squirrel.Cache
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capacity func() *int64
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}
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func (c *client) OpenTorrent(info *metainfo.Info, infoHash metainfo.Hash) (storage.TorrentImpl, error) {
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t := torrent{c.Cache}
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return storage.TorrentImpl{Piece: t.Piece, Close: t.Close, Capacity: &c.capacity}, nil
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}
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type torrent struct {
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c *squirrel.Cache
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}
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func (t torrent) Piece(p metainfo.Piece) storage.PieceImpl {
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ret := piece{
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sb: t.c.OpenWithLength(p.Hash().HexString(), p.Length()),
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}
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ret.ReaderAt = &ret.sb
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ret.WriterAt = &ret.sb
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return ret
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}
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func (t torrent) Close() error {
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return nil
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}
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type piece struct {
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sb squirrel.Blob
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io.ReaderAt
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io.WriterAt
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}
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func (p piece) MarkComplete() error {
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return p.sb.SetTag("verified", true)
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}
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func (p piece) MarkNotComplete() error {
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return p.sb.SetTag("verified", false)
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}
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func (p piece) Completion() (ret storage.Completion) {
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err := p.sb.GetTag("verified", func(stmt *sqlite.Stmt) {
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ret.Complete = stmt.ColumnInt(0) != 0
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})
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ret.Ok = err == nil
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if err != nil {
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panic(err)
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}
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return
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}
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