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refactor peerSet

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This commit is contained in:
Jeromy
2014-12-16 18:33:36 +00:00
committed by Juan Batiz-Benet
parent f533678724
commit 69dd260236
3 changed files with 22 additions and 9 deletions
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2
exchange/bitswap/bitswap.go
View File

@ -222,7 +222,7 @@ func (bs *bitswap) sendWantlistToProviders(ctx context.Context, wantlist *wl.Wan
providers := bs.routing.FindProvidersAsync(child, k, maxProvidersPerRequest)
for prov := range providers {
if ps.AddIfSmallerThan(prov, -1) { //Do once per peer
if ps.TryAdd(prov) { //Do once per peer
bs.send(ctx, prov, message)
}
}

8
routing/dht/routing.go
View File

@ -141,11 +141,11 @@ func (dht *IpfsDHT) FindProvidersAsync(ctx context.Context, key u.Key, count int
func (dht *IpfsDHT) findProvidersAsyncRoutine(ctx context.Context, key u.Key, count int, peerOut chan peer.Peer) {
defer close(peerOut)
ps := pset.NewPeerSet()
ps := pset.NewLimitedPeerSet(count)
provs := dht.providers.GetProviders(ctx, key)
for _, p := range provs {
// NOTE: assuming that this list of peers is unique
if ps.AddIfSmallerThan(p, count) {
if ps.TryAdd(p) {
select {
case peerOut <- p:
case <-ctx.Done():
@ -176,7 +176,7 @@ func (dht *IpfsDHT) findProvidersAsyncRoutine(ctx context.Context, key u.Key, co
// Add unique providers from request, up to 'count'
for _, prov := range provs {
if ps.AddIfSmallerThan(prov, count) {
if ps.TryAdd(prov) {
select {
case peerOut <- prov:
case <-ctx.Done():
@ -226,7 +226,7 @@ func (dht *IpfsDHT) addPeerListAsync(ctx context.Context, k u.Key, peers []*pb.M
}
dht.providers.AddProvider(k, p)
if ps.AddIfSmallerThan(p, count) {
if ps.TryAdd(p) {
select {
case out <- p:
case <-ctx.Done():

17
util/peerset/peerset.go
View File

@ -9,11 +9,20 @@ import (
type PeerSet struct {
ps map[string]bool
lk sync.RWMutex
size int
}
func NewPeerSet() *PeerSet {
ps := new(PeerSet)
ps.ps = make(map[string]bool)
ps.size = -1
return ps
}
func NewLimitedPeerSet(size int) *PeerSet {
ps := new(PeerSet)
ps.ps = make(map[string]bool)
ps.size = -1
return ps
}
@ -36,10 +45,14 @@ func (ps *PeerSet) Size() int {
return len(ps.ps)
}
func (ps *PeerSet) AddIfSmallerThan(p peer.Peer, maxsize int) bool {
// TryAdd Attempts to add the given peer into the set.
// This operation can fail for one of two reasons:
// 1) The given peer is already in the set
// 2) The number of peers in the set is equal to size
func (ps *PeerSet) TryAdd(p peer.Peer) bool {
var success bool
ps.lk.Lock()
if _, ok := ps.ps[string(p.ID())]; !ok && len(ps.ps) < maxsize {
if _, ok := ps.ps[string(p.ID())]; !ok && (len(ps.ps) < ps.size || ps.size == -1) {
success = true
ps.ps[string(p.ID())] = true
}