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fix: Fix writing into dead variables in BlockingCache (#2333)

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This commit is contained in:
Sergey Kuznetsov
2025-07-21 12:16:46 +01:00
committed by GitHub
parent d43002b49a
commit 61c17400fe
1 changed files with 18 additions and 9 deletions
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27
src/util/BlockingCache.hpp
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@@ -197,22 +197,31 @@ private:
std::expected<ValueType, ErrorType>
wait(boost::asio::yield_context yield, Updater updater, Verifier verifier)
{
boost::asio::steady_timer timer{yield.get_executor(), boost::asio::steady_timer::duration::max()};
struct SharedContext {
SharedContext(boost::asio::yield_context y)
: timer(y.get_executor(), boost::asio::steady_timer::duration::max())
{
}
boost::asio::steady_timer timer;
std::optional<std::expected<ValueType, ErrorType>> result;
};
auto sharedContext = std::make_shared<SharedContext>(yield);
boost::system::error_code errorCode;
std::optional<std::expected<ValueType, ErrorType>> result;
boost::signals2::scoped_connection const slot =
updateFinished_.connect([yield, &timer, &result](std::expected<ValueType, ErrorType> value) {
boost::asio::spawn(yield, [&timer, &result, value = std::move(value)](auto&&) {
result = std::move(value);
timer.cancel();
updateFinished_.connect([yield, sharedContext](std::expected<ValueType, ErrorType> value) {
boost::asio::spawn(yield, [sharedContext = std::move(sharedContext), value = std::move(value)](auto&&) {
sharedContext->result = std::move(value);
sharedContext->timer.cancel();
});
});
if (state_ == State::Updating) {
timer.async_wait(yield[errorCode]);
ASSERT(result.has_value(), "There should be some value after waiting");
return std::move(result).value();
sharedContext->timer.async_wait(yield[errorCode]);
ASSERT(sharedContext->result.has_value(), "There should be some value after waiting");
return std::move(sharedContext->result).value();
}
return asyncGet(yield, std::move(updater), std::move(verifier));
}