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Problem: throw error_t should follow only zmq call.

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This commit is contained in:
Pawel Kurdybacha 2018-04-18 19:23:26 +01:00
parent 810b87c021
commit f5b9fcc4ef
1 changed files with 8 additions and 9 deletions
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17
zmq.hpp
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@ -1058,18 +1058,17 @@ namespace zmq
void add (zmq::socket_t &socket, short events, handler_t handler)
{
if (!socket)
throw error_t ();
handler_t *handler_ptr = nullptr;
/// \todo is it sensible to allow handler to be empty? doesn't this lead to an error when the event is signalled? (perhaps it should already lead to an error in zmq_poller_add then)
if (handler) {
auto emplace_res = handlers.emplace (socket.ptr, std::move (handler));
handler_ptr = &emplace_res.first->second;
}
if (0 == zmq_poller_add (poller_ptr, socket.ptr, handler_ptr, events)) {
auto it = std::end (handlers);
auto inserted = false;
if (handler)
std::tie(it, inserted) = handlers.emplace (socket.ptr, std::move (handler));
if (0 == zmq_poller_add (poller_ptr, socket.ptr, inserted ? &(it->second) : nullptr, events)) {
poller_events.emplace_back (zmq_poller_event_t ());
return;
}
// rollback
if (inserted)
handlers.erase (socket.ptr);
throw error_t ();
}