.

wcfs/internal/zdata/δftail.go

@@ -146,25 +146,13 @@ type ΔFtail struct {
 
 	byFile map[zodb.Oid]*_ΔFileTail // file -> vδf tail
 	byRoot map[zodb.Oid]*_RootTrack // tree-root -> ({foid}, Zinblk)   as of @head
-//	filesByRoot map[zodb.Oid]setOid      // tree-root -> {} ZBigFile<oid>    as of @head
 
 	// set of files, which are newly tracked and for which byFile[foid].vδE was not yet rebuilt
 	ftrackNew setOid // {}foid
 
 	// set of tracked ZBlk objects mapped to trees  as of @head
-	// XXX -> Zinroot ?  ztrackInRoot ?
-	ztrackInRoots map[zodb.Oid]setOid // {} zblk -> {}root
-
-/*
-	// set of tracked ZBlk objects reverse-mapped to trees and block numbers
-	//
-	// XXX split -> :
-	//	ΔFtail.trackSetZBlkRoots	{} zblk  -> {root}
-	//	δftail.trackSetZBlkBlocks	{} zblk  -> {blk}     in tha file/root  (shared by all files with same root ?)
-	trackSetZBlk  map[zodb.Oid]*zblkTrack // zblk -> {} root -> {}blk    as of @head
-
-	ztrackRoots
-*/
+	// XXX -> ztrackInRoot ?
+	zinroot map[zodb.Oid]setOid // {} zblk -> {}root
 }
 
 // _ΔFileTail represents tail of revisional changes to one file.
@@ -184,14 +172,15 @@ type _ΔFileEpoch struct {
 	newBlkSize int64    // .blksize was changed to newBlkSize       ; ----//----
 
 	// snapshot of trackSetZBlk for this file right before this epoch
-//	oldTrackSetZBlk map[zodb.Oid]setI64 // {} zblk -> {}blk
 	oldZinblk map[zodb.Oid]setI64 // {} zblk -> {}blk
 }
 
 // _RootTrack represents tracking information about one particular tree as of @head.
 // XXX -> _TreeTrack ?  _BlktabTrack ?
 type _RootTrack struct {
+	// XXX -> ftrackSet ?
 	files  setOid              // {}foid		which ZBigFiles refer to this tree
+	// XXX -> ztrackInBlk ?
 	Zinblk map[zodb.Oid]setI64 // {} zblk -> {}blk	which blocks map to zblk
 }
 
@@ -237,7 +226,7 @@ func NewΔFtail(at0 zodb.Tid, db *zodb.DB) *ΔFtail {
 		byFile:    map[zodb.Oid]*_ΔFileTail{},
 		byRoot:    map[zodb.Oid]*_RootTrack{},
 		ftrackNew: setOid{},
-		ztrackInRoots: map[zodb.Oid]setOid{},
+		zinroot:   map[zodb.Oid]setOid{},
 	}
 }
 
@@ -307,10 +296,10 @@ func (δFtail *ΔFtail) Track(file *ZBigFile, blk int64, path []btree.LONode, bl
 	if zblk != nil {
 		zoid := zblk.POid()
 
-		inroot, ok := δFtail.ztrackInRoots[zoid]
+		inroot, ok := δFtail.zinroot[zoid]
 		if !ok {
 			inroot = make(setOid, 1)
-			δFtail.ztrackInRoots[zoid] = inroot
+			δFtail.zinroot[zoid] = inroot
 		}
 		inroot.Add(root)
 
@@ -455,7 +444,7 @@ func (δFtail *ΔFtail) Update(δZ *zodb.EventCommit) (_ ΔF, err error) {
 			if ok {
 				for zoid, inblk := range rt.Zinblk {
 					δE.oldZinblk[zoid] = inblk.Clone()
-					inroot, ok := δFtail.ztrackInRoots[zoid]
+					inroot, ok := δFtail.zinroot[zoid]
 					if ok {
 						inroot.Del(δftail.root)
 					}
@@ -502,8 +491,15 @@ func (δFtail *ΔFtail) Update(δZ *zodb.EventCommit) (_ ΔF, err error) {
 				inblk, ok := rt.Zinblk[δzblk.Old]
 				if ok {
 					inblk.Del(blk)
+					if len(inblk) == 0 {
+						delete(rt.Zinblk, δzblk.Old)
+						inroot := δFtail.zinroot[δzblk.Old]
+						inroot.Del(root)
+						if len(inroot) == 0 {
+							delete(δFtail.zinroot, δzblk.Old)
+						}
+					}
 				}
-				// XXX update Zinroot  (potentially del)
 			}
 
 			if δzblk.New != xbtree.VDEL {
@@ -511,16 +507,21 @@ func (δFtail *ΔFtail) Update(δZ *zodb.EventCommit) (_ ΔF, err error) {
 				if !ok {
 					inblk = make(setI64, 1)
 					rt.Zinblk[δzblk.New] = inblk
+					inroot, ok := δFtail.zinroot[δzblk.New]
+					if !ok {
+						inroot = make(setOid, 1)
+						δFtail.zinroot[δzblk.New] = inroot
+					}
+					inroot.Add(root)
 				}
 				inblk.Add(blk)
-				// XXX update Zinroot  (add)
 			}
 		}
 	}
 
 	// take zblk changes into account
 	for _, oid := range δZ.Changev {
-		inroot, ok := δFtail.ztrackInRoots[oid]
+		inroot, ok := δFtail.zinroot[oid]
 		if !ok {
 			continue // not tracked
 		}
@@ -564,6 +565,7 @@ func (δFtail *ΔFtail) Update(δZ *zodb.EventCommit) (_ ΔF, err error) {
 				rt.files.Del(foid)
 				if len(rt.files) == 0 {
 					delete(δFtail.byRoot, δ.blktabOld)
+					// XXX reset Zinroot -= δ.blktabNew
 				}
 			}
 		}
@@ -573,6 +575,7 @@ func (δFtail *ΔFtail) Update(δZ *zodb.EventCommit) (_ ΔF, err error) {
 				rt = &_RootTrack{
 					files:  setOid{},
 					Zinblk: map[zodb.Oid]setI64{},
+					// XXX reset Zinroot -= δ.blktabNew
 				}
 				δFtail.byRoot[δ.blktabNew] = rt
 			}

wcfs/internal/zdata/δftail_test.go

@@ -445,31 +445,11 @@ func testΔFtail(t_ *testing.T, testq chan ΔFTestEntry) {
 			retrackAll()
 		}
 
-		// verify byRoot, Zinroot
-		trackZinroot := map[string]setOid{}
+		// verify byRoot
 		trackRfiles  := map[zodb.Oid]setOid{}
 		for root, rt := range δFtail.byRoot {
 			trackRfiles[root] = rt.files
-			for zoid := range rt.Zinblk {
-				zblki := commit.ZBlkTab[zoid]
-				inroot, ok := trackZinroot[zblki.Name]
-				if !ok {
-					inroot = setOid{}
-					trackZinroot[zblki.Name] = inroot
-				}
-				inroot.Add(root)
-			}
-		}
-
-		Zinroot := map[string]setOid{}
-		for zblk := range Zinblk {
-			inroot := setOid{}; inroot.Add(t.Root())
-			Zinroot[zblk] = inroot
-		}
-		if !reflect.DeepEqual(trackZinroot, Zinroot) {
-			t.Errorf("Zinroot:\nhave: %v\n want: %v", trackZinroot, Zinroot)
 		}
-
 		filesOK := setOid{}
 		if !delfile {
 			filesOK.Add(foid)
@@ -479,7 +459,22 @@ func testΔFtail(t_ *testing.T, testq chan ΔFTestEntry) {
 			RfilesOK[t.Root()] = filesOK
 		}
 		if !reflect.DeepEqual(trackRfiles, RfilesOK) {
-			t.Errorf("Rfiles:\nhave: %v\n want: %v", trackRfiles, RfilesOK)
+			t.Errorf("Rfiles:\nhave: %v\nwant: %v", trackRfiles, RfilesOK)
+		}
+
+		// verify Zinroot
+		trackZinroot := map[string]setOid{}
+		for zoid, inroot := range δFtail.zinroot {
+			zblki := commit.ZBlkTab[zoid]
+			trackZinroot[zblki.Name] = inroot.Clone() // XXX clone needed?
+		}
+		Zinroot := map[string]setOid{}
+		for zblk := range Zinblk {
+			inroot := setOid{}; inroot.Add(t.Root())
+			Zinroot[zblk] = inroot
+		}
+		if !reflect.DeepEqual(trackZinroot, Zinroot) {
+			t.Errorf("Zinroot:\nhave: %v\nwant: %v", trackZinroot, Zinroot)
 		}
 
 		// verify Zinblk
@@ -503,7 +498,7 @@ func testΔFtail(t_ *testing.T, testq chan ΔFTestEntry) {
 			t.Errorf("len(.byRoot) != (0,1)  ; byRoot: %v", δFtail.byRoot)
 		}
 		if !reflect.DeepEqual(trackZinblk, Zinblk) {
-			t.Errorf("Zinblk:\nhave: %v\n want: %v", trackZinblk, Zinblk)
+			t.Errorf("Zinblk:\nhave: %v\nwant: %v", trackZinblk, Zinblk)
 		}
 
 		// ForgetPast configured threshold