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RsGxsNetService::receiveTurtleSearchResults fix deadlock

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Avoid notifing observer while the mutex is locked by storing results in
a temporary set
This commit is contained in:
Gioacchino Mazzurco 2018-08-16 14:26:41 +02:00
parent b4dd89dd87
commit b7f5d4286f
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GPG Key ID: A1FBCA3872E87051
1 changed files with 35 additions and 27 deletions
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62
libretroshare/src/gxs/rsgxsnetservice.cc
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@ -5181,43 +5181,51 @@ bool RsGxsNetService::clearDistantSearchResults(const TurtleRequestId& id)
} }
void RsGxsNetService::receiveTurtleSearchResults(TurtleRequestId req, const std::list<RsGxsGroupSummary>& group_infos) void RsGxsNetService::receiveTurtleSearchResults(TurtleRequestId req, const std::list<RsGxsGroupSummary>& group_infos)
{ {
RS_STACK_MUTEX(mNxsMutex) ; std::set<RsGxsGroupId> groupsToNotifyResults;
RsGxsGrpMetaTemporaryMap grpMeta; {
std::map<RsGxsGroupId,RsGxsGroupSummary>& search_results_map(mDistantSearchResults[req]) ; RS_STACK_MUTEX(mNxsMutex);
for(auto it(group_infos.begin());it!=group_infos.end();++it) RsGxsGrpMetaTemporaryMap grpMeta;
if(search_results_map.find((*it).mGroupId) == search_results_map.end()) std::map<RsGxsGroupId,RsGxsGroupSummary>&
grpMeta[(*it).mGroupId] = NULL; search_results_map(mDistantSearchResults[req]);
mDataStore->retrieveGxsGrpMetaData(grpMeta); for(auto it(group_infos.begin());it!=group_infos.end();++it)
if(search_results_map.find((*it).mGroupId) == search_results_map.end())
grpMeta[(*it).mGroupId] = NULL;
std::list<RsGxsGroupSummary> filtered_results ; mDataStore->retrieveGxsGrpMetaData(grpMeta);
// only keep groups that are not locally known, and groups that are not already in the mDistantSearchResults structure // only keep groups that are not locally known, and groups that are not already in the mDistantSearchResults structure
for(auto it(group_infos.begin());it!=group_infos.end();++it) for(auto it(group_infos.begin());it!=group_infos.end();++it)
if(grpMeta[(*it).mGroupId] == NULL) if(grpMeta[(*it).mGroupId] == NULL)
{ {
filtered_results.push_back(*it) ; const RsGxsGroupId& grpId((*it).mGroupId);
auto it2 = search_results_map.find((*it).mGroupId) ; groupsToNotifyResults.insert(grpId);
if(it2 != search_results_map.end()) auto it2 = search_results_map.find(grpId);
{
// update existing data
it2->second.mPopularity++ ; if(it2 != search_results_map.end())
it2->second.mNumberOfMessages = std::max(it2->second.mNumberOfMessages,(*it).mNumberOfMessages) ; {
} // update existing data
else
{
search_results_map[(*it).mGroupId] = *it;
search_results_map[(*it).mGroupId].mPopularity = 1; // number of results so far
}
mObserver->receiveDistantSearchResults(req,(*it).mGroupId) ; it2->second.mPopularity++;
} it2->second.mNumberOfMessages = std::max(
it2->second.mNumberOfMessages,
(*it).mNumberOfMessages );
}
else
{
search_results_map[grpId] = *it;
search_results_map[grpId].mPopularity = 1; // number of results so far
}
}
} // end RS_STACK_MUTEX(mNxsMutex);
for(const RsGxsGroupId& grpId : groupsToNotifyResults)
mObserver->receiveDistantSearchResults(req, grpId);
} }
void RsGxsNetService::receiveTurtleSearchResults(TurtleRequestId req,const unsigned char *encrypted_group_data,uint32_t encrypted_group_data_len) void RsGxsNetService::receiveTurtleSearchResults(TurtleRequestId req,const unsigned char *encrypted_group_data,uint32_t encrypted_group_data_len)