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added a check to avoid (possibly rare) data races

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git-svn-id: http://svn.code.sf.net/p/retroshare/code/branches/v0.5.0@2901 b45a01b8-16f6-495d-af2f-9b41ad6348cc
This commit is contained in:
csoler 2010-05-14 11:29:15 +00:00
parent 73343f9250
commit 37a2bfb8de
1 changed files with 5 additions and 1 deletions
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6
libretroshare/src/ft/ftdatamultiplex.cc
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@ -478,7 +478,11 @@ bool ftDataMultiplex::handleRecvServerChunkMapRequest(const std::string& peerId,
RsStackMutex stack(dataMtx); /******* LOCK MUTEX ******/
it = mServers.find(hash) ;
it->second->getAvailabilityMap(cmap);
if(it == mServers.end()) // handleSearchRequest should have filled mServers[hash], but we have been off-mutex since,
return false ; // so it's safer to check again.
else
it->second->getAvailabilityMap(cmap);
}
mDataSend->sendChunkMap(peerId,hash,cmap);