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Merge pull request #4130 

979105b abstract_tcp_server2: fix race on shutdown (moneromooo-monero)
This commit is contained in:
luigi1111 2018-08-15 17:13:35 -05:00
parent ad13b6d25a 979105b298
commit 3b409a3b8a
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GPG Key ID: F4ACA0183641E010
2 changed files with 9 additions and 1 deletions
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1
contrib/epee/include/net/abstract_tcp_server2.h
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@ -158,6 +158,7 @@ namespace net_utils
std::list<boost::shared_ptr<connection<t_protocol_handler> > > m_self_refs; // add_ref/release support
critical_section m_self_refs_lock;
critical_section m_chunking_lock; // held while we add small chunks of the big do_send() to small do_send_chunk()
critical_section m_shutdown_lock; // held while shutting down
t_connection_type m_connection_type;

9
contrib/epee/include/net/abstract_tcp_server2.inl
View File

@ -649,6 +649,10 @@ PRAGMA_WARNING_DISABLE_VS(4355)
template<class t_protocol_handler>
bool connection<t_protocol_handler>::shutdown()
{
CRITICAL_REGION_BEGIN(m_shutdown_lock);
if (m_was_shutdown)
return true;
m_was_shutdown = true;
// Initiate graceful connection closure.
m_timer.cancel();
boost::system::error_code ignored_ec;
@ -658,7 +662,7 @@ PRAGMA_WARNING_DISABLE_VS(4355)
try { host_count(m_host, -1); } catch (...) { /* ignore */ }
m_host = "";
}
m_was_shutdown = true;
CRITICAL_REGION_END();
m_protocol_handler.release_protocol();
return true;
}
@ -667,6 +671,9 @@ PRAGMA_WARNING_DISABLE_VS(4355)
bool connection<t_protocol_handler>::close()
{
TRY_ENTRY();
auto self = safe_shared_from_this();
if(!self)
return false;
//_info("[sock " << socket_.native_handle() << "] Que Shutdown called.");
m_timer.cancel();
size_t send_que_size = 0;