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// Copyright (C) 2021-2022 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
#ifndef TIMED_SIGNAL_H
#define TIMED_SIGNAL_H
#include <config.h>
#include <asiolink/interval_timer.h>
#include <signal.h>
#include <gtest/gtest.h>
namespace isc {
namespace asiolink {
namespace test {
/// @brief Implements a time-delayed signal
///
/// Given an IOService, a signal number, and a time period, this class will
/// send (raise) the signal to the current process.
class TimedSignal {
public:
/// @brief Constructor
///
/// @param io_service IOService to run the timer
/// @param signum OS signal value (e.g. SIGHUP, SIGUSR1 ...)
/// @param milliseconds time in milliseconds to wait until the signal is
/// raised.
/// @param mode selects between a one-shot signal or a signal which repeats
/// at "milliseconds" interval.
TimedSignal(asiolink::IOService& io_service, int signum, int milliseconds,
const asiolink::IntervalTimer::Mode& mode =
asiolink::IntervalTimer::ONE_SHOT)
: timer_(new asiolink::IntervalTimer(io_service)) {
timer_->setup(SendSignalCallback(signum), milliseconds, mode);
}
/// @brief Cancels the given timer.
void cancel() {
if (timer_) {
timer_->cancel();
}
}
/// @brief Destructor.
~TimedSignal() {
cancel();
}
/// @brief Callback for the TimeSignal's internal timer.
class SendSignalCallback {
public:
/// @brief Constructor
///
/// @param signum OS signal value of the signal to send
SendSignalCallback(int signum) : signum_(signum) {
}
/// @brief Callback method invoked when the timer expires
///
/// Calls raise with the given signal which should generate that
/// signal to the given process.
void operator()() {
ASSERT_EQ(0, raise(signum_));
return;
}
private:
/// @brief Stores the OS signal value to send.
int signum_;
};
private:
/// @brief Timer which controls when the signal is sent.
asiolink::IntervalTimerPtr timer_;
};
} // end of namespace isc::asiolink::test
} // end of namespace isc::asiolink
} // end of namespace isc
#endif // TIMED_SIGNAL_H
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