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// Copyright (C) 2018-2019,2021 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 THREADED_TEST_H
#define THREADED_TEST_H
#include <boost/shared_ptr.hpp>
#include <gtest/gtest.h>
#include <thread>
#include <mutex>
#include <condition_variable>
namespace isc {
namespace test {
/// @brief Base class for tests requiring threads.
///
/// This class contains 3 flags to signal when the thread has
/// started, is stopping and when it is stopped. The flags
/// are accessed in thread safe manner.
class ThreadedTest : public ::testing::Test {
protected:
/// @brief Constructor.
ThreadedTest();
/// @brief Sets selected flag to true and signals condition
/// variable.
///
/// @param flag Reference to flag which should be set to true.
void doSignal(bool& flag);
/// @brief Signal that thread is ready.
void signalReady();
/// @brief Signal that thread is stopping.
void signalStopping();
/// @brief Signal that thread is stopped.
void signalStopped();
/// @brief Wait for a selected flag to be set.
///
/// @param flag Reference to a flag on which the thread is
/// waiting.
void doWait(bool& flag);
/// @brief Wait for the thread to be ready.
void waitReady();
/// @brief Wait for the thread to be stopping.
void waitStopping();
/// @brief Wait for the thread to stop.
void waitStopped();
/// @brief Checks if the thread is stopping.
///
/// @return true if the thread is stopping, false otherwise.
bool isStopping();
/// @brief Pointer to server thread.
boost::shared_ptr<std::thread> thread_;
/// @brief Mutex used to synchronize threads.
std::mutex mutex_;
/// Conditional variable for thread waits.
std::condition_variable condvar_;
/// Flag indicating that the thread is ready.
bool ready_;
/// Flag indicating that the thread is stopping.
bool stopping_;
/// Flag indicating that the thread is stopped.
bool stopped_;
};
} // end of namespace isc::test
} // end of namespace isc
#endif
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