Merge pull request ipfs/go-bitswap#349 from ipfs/refactor/simplify-mq…

…-onSent

refactor: simplify messageQueue onSent

This commit was moved from ipfs/go-bitswap@6099047

bitswap/internal/messagequeue/messagequeue.go

@@ -113,8 +113,8 @@ func (r *recallWantlist) RemoveType(c cid.Cid, wtype pb.Message_Wantlist_WantTyp
 	r.pending.RemoveType(c, wtype)
 }
 
-// Sent moves the want from the pending to the sent list
-func (r *recallWantlist) Sent(e bsmsg.Entry) {
+// MarkSent moves the want from the pending to the sent list
+func (r *recallWantlist) MarkSent(e wantlist.Entry) {
 	r.pending.RemoveType(e.Cid, e.WantType)
 	r.sent.Add(e.Cid, e.Priority, e.WantType)
 }
@@ -439,7 +439,7 @@ func (mq *MessageQueue) sendMessage() {
 	for i := 0; i < maxRetries; i++ {
 		if mq.attemptSendAndRecovery(message) {
 			// We were able to send successfully.
-			onSent(wantlist)
+			onSent()
 
 			mq.simulateDontHaveWithTimeout(wantlist)
 
@@ -540,7 +540,7 @@ func (mq *MessageQueue) pendingWorkCount() int {
 }
 
 // Convert the lists of wants into a Bitswap message
-func (mq *MessageQueue) extractOutgoingMessage(supportsHave bool) (bsmsg.BitSwapMessage, func([]bsmsg.Entry)) {
+func (mq *MessageQueue) extractOutgoingMessage(supportsHave bool) (bsmsg.BitSwapMessage, func()) {
 	mq.wllock.Lock()
 	defer mq.wllock.Unlock()
 
@@ -566,6 +566,7 @@ func (mq *MessageQueue) extractOutgoingMessage(supportsHave bool) (bsmsg.BitSwap
 	}
 
 	// Add each regular want-have / want-block to the message
+	peerSent := make([]wantlist.Entry, 0, len(peerEntries))
 	for i := 0; i < len(peerEntries) && msgSize < mq.maxMessageSize; i++ {
 		e := peerEntries[i]
 		// If the remote peer doesn't support HAVE / DONT_HAVE messages,
@@ -574,11 +575,13 @@ func (mq *MessageQueue) extractOutgoingMessage(supportsHave bool) (bsmsg.BitSwap
 			mq.peerWants.RemoveType(e.Cid, pb.Message_Wantlist_Have)
 		} else {
 			msgSize += mq.msg.AddEntry(e.Cid, e.Priority, e.WantType, true)
+			peerSent = append(peerSent, e)
 		}
 	}
 
 	// Add each broadcast want-have to the message
-	for i := 0; i < len(bcstEntries) && msgSize < mq.maxMessageSize; i++ {
+	bcstSentCount := 0
+	for ; bcstSentCount < len(bcstEntries) && msgSize < mq.maxMessageSize; bcstSentCount++ {
 		// Broadcast wants are sent as want-have
 		wantType := pb.Message_Wantlist_Have
 
@@ -588,41 +591,27 @@ func (mq *MessageQueue) extractOutgoingMessage(supportsHave bool) (bsmsg.BitSwap
 			wantType = pb.Message_Wantlist_Block
 		}
 
-		e := bcstEntries[i]
+		e := bcstEntries[bcstSentCount]
 		msgSize += mq.msg.AddEntry(e.Cid, e.Priority, wantType, false)
 	}
 
 	// Called when the message has been successfully sent.
-	onMessageSent := func(wantlist []bsmsg.Entry) {
-		bcst := keysToSet(bcstEntries)
-		prws := keysToSet(peerEntries)
-
+	onMessageSent := func() {
 		mq.wllock.Lock()
 		defer mq.wllock.Unlock()
 
 		// Move the keys from pending to sent
-		for _, e := range wantlist {
-			if _, ok := bcst[e.Cid]; ok {
-				mq.bcstWants.Sent(e)
-			}
-			if _, ok := prws[e.Cid]; ok {
-				mq.peerWants.Sent(e)
-			}
+		for i := 0; i < bcstSentCount; i++ {
+			mq.bcstWants.MarkSent(bcstEntries[i])
+		}
+		for _, e := range peerSent {
+			mq.peerWants.MarkSent(e)
 		}
 	}
 
 	return mq.msg, onMessageSent
 }
 
-// Convert wantlist entries into a set of cids
-func keysToSet(wl []wantlist.Entry) map[cid.Cid]struct{} {
-	set := make(map[cid.Cid]struct{}, len(wl))
-	for _, e := range wl {
-		set[e.Cid] = struct{}{}
-	}
-	return set
-}
-
 func (mq *MessageQueue) initializeSender() error {
 	if mq.sender != nil {
 		return nil