"fmt"
"sync"
+ "github.com/anacrolix/chansync"
"github.com/anacrolix/missinggo/v2/bitmap"
"github.com/anacrolix/torrent/metainfo"
"github.com/anacrolix/torrent/storage"
)
-// Describes the importance of obtaining a particular piece.
-type piecePriority byte
-
-func (pp *piecePriority) Raise(maybe piecePriority) bool {
- if maybe > *pp {
- *pp = maybe
- return true
- }
- return false
-}
-
-// Priority for use in PriorityBitmap
-func (me piecePriority) BitmapPriority() int {
- return -int(me)
-}
-
-const (
- PiecePriorityNone piecePriority = iota // Not wanted. Must be the zero value.
- PiecePriorityNormal // Wanted.
- PiecePriorityHigh // Wanted a lot.
- PiecePriorityReadahead // May be required soon.
- // Succeeds a piece where a read occurred. Currently the same as Now,
- // apparently due to issues with caching.
- PiecePriorityNext
- PiecePriorityNow // A Reader is reading in this piece. Highest urgency.
-)
-
type Piece struct {
// The completed piece SHA1 hash, from the metainfo "pieces" field.
hash *metainfo.Hash
t *Torrent
index pieceIndex
files []*File
- // Chunks we've written to since the last check. The chunk offset and
- // length can be determined by the request chunkSize in use.
- _dirtyChunks bitmap.Bitmap
- hashing bool
+ readerCond chansync.BroadcastCond
+
numVerifies int64
+ hashing bool
+ marking bool
storageCompletionOk bool
publicPieceState PieceState
priority piecePriority
+ // Availability adjustment for this piece relative to len(Torrent.connsWithAllPieces). This is
+ // incremented for any piece a peer has when a peer has a piece, Torrent.haveInfo is true, and
+ // the Peer isn't recorded in Torrent.connsWithAllPieces.
+ relativeAvailability int
+ // This can be locked when the Client lock is taken, but probably not vice versa.
pendingWritesMutex sync.Mutex
pendingWrites int
noPendingWrites sync.Cond
// Connections that have written data to this piece since its last check.
// This can include connections that have closed.
- dirtiers map[*PeerConn]struct{}
+ dirtiers map[*Peer]struct{}
}
func (p *Piece) String() string {
return p.t.storage.Piece(p.Info())
}
-func (p *Piece) pendingChunkIndex(chunkIndex int) bool {
- return !p._dirtyChunks.Contains(chunkIndex)
+func (p *Piece) Flush() {
+ if p.t.storage.Flush != nil {
+ _ = p.t.storage.Flush()
+ }
+}
+
+func (p *Piece) pendingChunkIndex(chunkIndex chunkIndexType) bool {
+ return !p.chunkIndexDirty(chunkIndex)
}
-func (p *Piece) pendingChunk(cs chunkSpec, chunkSize pp.Integer) bool {
- return p.pendingChunkIndex(chunkIndex(cs, chunkSize))
+func (p *Piece) pendingChunk(cs ChunkSpec, chunkSize pp.Integer) bool {
+ return p.pendingChunkIndex(chunkIndexFromChunkSpec(cs, chunkSize))
}
func (p *Piece) hasDirtyChunks() bool {
- return p._dirtyChunks.Len() != 0
+ return p.numDirtyChunks() != 0
}
-func (p *Piece) numDirtyChunks() pp.Integer {
- return pp.Integer(p._dirtyChunks.Len())
+func (p *Piece) numDirtyChunks() chunkIndexType {
+ return chunkIndexType(roaringBitmapRangeCardinality[RequestIndex](
+ &p.t.dirtyChunks,
+ p.requestIndexOffset(),
+ p.t.pieceRequestIndexOffset(p.index+1)))
}
-func (p *Piece) unpendChunkIndex(i int) {
- p._dirtyChunks.Add(i)
- p.t.tickleReaders()
+func (p *Piece) unpendChunkIndex(i chunkIndexType) {
+ p.t.dirtyChunks.Add(p.requestIndexOffset() + i)
+ p.t.updatePieceRequestOrder(p.index)
+ p.readerCond.Broadcast()
}
-func (p *Piece) pendChunkIndex(i int) {
- p._dirtyChunks.Remove(i)
+func (p *Piece) pendChunkIndex(i RequestIndex) {
+ p.t.dirtyChunks.Remove(p.requestIndexOffset() + i)
+ p.t.updatePieceRequestOrder(p.index)
}
-func (p *Piece) numChunks() pp.Integer {
+func (p *Piece) numChunks() chunkIndexType {
return p.t.pieceNumChunks(p.index)
}
p.pendingWritesMutex.Unlock()
}
-func (p *Piece) chunkIndexDirty(chunk pp.Integer) bool {
- return p._dirtyChunks.Contains(bitmap.BitIndex(chunk))
+func (p *Piece) chunkIndexDirty(chunk chunkIndexType) bool {
+ return p.t.dirtyChunks.Contains(p.requestIndexOffset() + chunk)
}
-func (p *Piece) chunkIndexSpec(chunk pp.Integer) chunkSpec {
- return chunkIndexSpec(chunk, p.length(), p.chunkSize())
-}
-
-func (p *Piece) chunkIndexRequest(chunkIndex pp.Integer) request {
- return request{
- pp.Integer(p.index),
- chunkIndexSpec(chunkIndex, p.length(), p.chunkSize()),
- }
+func (p *Piece) chunkIndexSpec(chunk chunkIndexType) ChunkSpec {
+ return chunkIndexSpec(pp.Integer(chunk), p.length(), p.chunkSize())
}
func (p *Piece) numDirtyBytes() (ret pp.Integer) {
return p.t.chunkSize
}
-func (p *Piece) lastChunkIndex() pp.Integer {
+func (p *Piece) lastChunkIndex() chunkIndexType {
return p.numChunks() - 1
}
if p.hashing {
target++
}
- //log.Printf("target: %d", target)
+ // log.Printf("target: %d", target)
p.t.queuePieceCheck(p.index)
for {
- //log.Printf("got %d verifies", p.numVerifies)
+ // log.Printf("got %d verifies", p.numVerifies)
if p.numVerifies >= target {
break
}
p.t.cl.lock()
defer p.t.cl.unlock()
p.priority = prio
- p.t.updatePiecePriority(p.index)
+ p.t.updatePiecePriority(p.index, "Piece.SetPriority")
}
-func (p *Piece) uncachedPriority() (ret piecePriority) {
- if p.t.pieceComplete(p.index) || p.t.pieceQueuedForHash(p.index) || p.t.hashingPiece(p.index) {
- return PiecePriorityNone
- }
+func (p *Piece) purePriority() (ret piecePriority) {
for _, f := range p.files {
ret.Raise(f.prio)
}
- if p.t.readerNowPieces().Contains(int(p.index)) {
+ if p.t.readerNowPieces().Contains(bitmap.BitIndex(p.index)) {
ret.Raise(PiecePriorityNow)
}
// if t._readerNowPieces.Contains(piece - 1) {
return
}
+func (p *Piece) uncachedPriority() (ret piecePriority) {
+ if p.hashing || p.marking || p.t.pieceComplete(p.index) || p.queuedForHash() {
+ return PiecePriorityNone
+ }
+ return p.purePriority()
+}
+
+// Tells the Client to refetch the completion status from storage, updating priority etc. if
+// necessary. Might be useful if you know the state of the piece data has changed externally.
+func (p *Piece) UpdateCompletion() {
+ p.t.cl.lock()
+ defer p.t.cl.unlock()
+ p.t.updatePieceCompletion(p.index)
+}
+
func (p *Piece) completion() (ret storage.Completion) {
ret.Complete = p.t.pieceComplete(p.index)
ret.Ok = p.storageCompletionOk
}
func (p *Piece) allChunksDirty() bool {
- return p._dirtyChunks.Len() == int(p.numChunks())
+ return p.numDirtyChunks() == p.numChunks()
+}
+
+func (p *Piece) State() PieceState {
+ return p.t.PieceState(p.index)
}
-func (p *Piece) requestStrategyPiece() requestStrategyPiece {
- return p
+func (p *Piece) requestIndexOffset() RequestIndex {
+ return p.t.pieceRequestIndexOffset(p.index)
}
-func (p *Piece) dirtyChunks() bitmap.Bitmap {
- return p._dirtyChunks
+func (p *Piece) availability() int {
+ return len(p.t.connsWithAllPieces) + p.relativeAvailability
}