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#pragma once
#include <boost/asio/basic_waitable_timer.hpp>
#include <boost/intrusive_ptr.hpp>
#include "common/ceph_time.h"
namespace rgw {
// a WaitHandler that closes a stream if the timeout expires
template <typename Stream>
struct timeout_handler {
// this handler may outlive the timer/stream, so we need to hold a reference
// to keep the stream alive
boost::intrusive_ptr<Stream> stream;
explicit timeout_handler(boost::intrusive_ptr<Stream> stream) noexcept
: stream(std::move(stream)) {}
void operator()(boost::system::error_code ec) {
if (!ec) { // wait was not canceled
boost::system::error_code ec_ignored;
stream->close(ec_ignored);
}
}
};
// a timeout timer for stream operations
template <typename Clock, typename Executor, typename Stream>
class basic_timeout_timer {
public:
using clock_type = Clock;
using duration = typename clock_type::duration;
using executor_type = Executor;
explicit basic_timeout_timer(const executor_type& ex, duration dur,
boost::intrusive_ptr<Stream> stream)
: timer(ex), dur(dur), stream(std::move(stream))
{}
basic_timeout_timer(const basic_timeout_timer&) = delete;
basic_timeout_timer& operator=(const basic_timeout_timer&) = delete;
void start() {
if (dur.count() > 0) {
timer.expires_after(dur);
timer.async_wait(timeout_handler{stream});
}
}
void cancel() {
if (dur.count() > 0) {
timer.cancel();
}
}
private:
using Timer = boost::asio::basic_waitable_timer<clock_type,
boost::asio::wait_traits<clock_type>, executor_type>;
Timer timer;
duration dur;
boost::intrusive_ptr<Stream> stream;
};
} // namespace rgw
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