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fix deadlocks

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This commit is contained in:
Robert Habermeier
2016-12-16 22:09:29 +01:00
parent 8970946b74
commit a7505be627
2 changed files with 21 additions and 9 deletions
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24
sync/src/light_sync/mod.rs
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@@ -193,9 +193,11 @@ impl<L: LightChainClient> Handler for LightSync<L> {
head_num: status.head_num,
};
let mut best = self.best_seen.lock();
if best.as_ref().map_or(true, |b| status.head_td > b.1) {
*best = Some((status.head_hash, status.head_td));
{
let mut best = self.best_seen.lock();
if best.as_ref().map_or(true, |b| status.head_td > b.1) {
*best = Some((status.head_hash, status.head_td));
}
}
self.peers.write().insert(ctx.peer(), Mutex::new(Peer::new(chain_info)));
@@ -210,6 +212,8 @@ impl<L: LightChainClient> Handler for LightSync<L> {
None => return,
};
trace!(target: "sync", "peer {} disconnecting", peer_id);
let new_best = {
let mut best = self.best_seen.lock();
let peer_best = (peer.status.head_hash, peer.status.head_td);
@@ -249,7 +253,7 @@ impl<L: LightChainClient> Handler for LightSync<L> {
fn on_announcement(&self, ctx: &EventContext, announcement: &Announcement) {
let last_td = {
let peers = self.peers.read();
match peers.get(&ctx.peer()){
match peers.get(&ctx.peer()) {
None => return,
Some(peer) => {
let mut peer = peer.lock();
@@ -273,9 +277,11 @@ impl<L: LightChainClient> Handler for LightSync<L> {
ctx.disconnect_peer(ctx.peer());
}
let mut best = self.best_seen.lock();
if best.as_ref().map_or(true, |b| announcement.head_td > b.1) {
*best = Some((announcement.head_hash, announcement.head_td));
{
let mut best = self.best_seen.lock();
if best.as_ref().map_or(true, |b| announcement.head_td > b.1) {
*best = Some((announcement.head_hash, announcement.head_td));
}
}
self.maintain_sync(ctx.as_basic());
@@ -326,12 +332,16 @@ impl<L: LightChainClient> LightSync<L> {
return;
}
trace!(target: "sync", "Beginning search for common ancestor");
*state = SyncState::AncestorSearch(AncestorSearch::begin(chain_info.best_block_number));
}
fn maintain_sync(&self, ctx: &BasicContext) {
const DRAIN_AMOUNT: usize = 128;
debug!(target: "sync", "Maintaining sync.");
let mut state = self.state.lock();
// drain any pending blocks into the queue.