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signal_emitter: Don't swallow exceptions

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If any signal receiver throws an exception for any reason after
receiving a signal, no one would find out about it because the signal
emitter just ignored exceptions

Also actually delivering the signal caused some exceptions because not
all signals have a receiver.

Resolves #1593
This commit is contained in:
patrick96 2019-01-14 21:22:00 +01:00 committed by Patrick Ziegler
parent b3ceedde76
commit b636baf082
1 changed files with 8 additions and 4 deletions
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12
include/events/signal_emitter.hpp
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@ -1,6 +1,7 @@
#pragma once
#include "common.hpp"
#include "components/logger.hpp"
#include "events/signal_receiver.hpp"
POLYBAR_NS
@ -25,12 +26,15 @@ class signal_emitter {
template <typename Signal>
bool emit(const Signal& sig) {
try {
for (auto&& item : g_signal_receivers.at(id<Signal>())) {
if (item.second->on(sig)) {
return true;
if (g_signal_receivers.find(id<Signal>()) != g_signal_receivers.end()) {
for (auto&& item : g_signal_receivers.at(id<Signal>())) {
if (item.second->on(sig)) {
return true;
}
}
}
} catch (...) {
} catch (const std::exception& e) {
logger::make().err(e.what());
}
return false;