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levin: armour against some "should not happen" case 

If adding a response handler after the protocol is released,
they could never be cancelled again, and would end up keeping
a ref that never goes away
This commit is contained in:
moneromooo-monero 2019-09-12 12:29:47 +00:00
parent d0d76f771a
commit e48dcb7a01
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1 changed files with 5 additions and 0 deletions
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5
contrib/epee/include/net/levin_protocol_handler_async.h
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@ -272,6 +272,11 @@ public:
bool add_invoke_response_handler(const callback_t &cb, uint64_t timeout, async_protocol_handler& con, int command)
{
CRITICAL_REGION_LOCAL(m_invoke_response_handlers_lock);
if (m_protocol_released)
{
MERROR("Adding response handler to a released object");
return false;
}
boost::shared_ptr<invoke_response_handler_base> handler(boost::make_shared<anvoke_handler<callback_t>>(cb, timeout, con, command));
m_invoke_response_handlers.push_back(handler);
return handler->is_timer_started();