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/*
* Copyright © 2014 Canonical Ltd.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Authored by: Alberto Aguirre <alberto.aguirre@canonical.com>
*/
/** AutoUnblockThread is a helper thread class that can gracefully shutdown
* at destruction time. This is helpul for tests that botch create
* threads and use ASSERT macros for example (or any other condition that
* makes the test exit early). Using naked std::thread would call std::terminate
* under such conditions.
*/
#ifndef MIR_TEST_AUTO_UNBLOCK_THREAD_H_
#define MIR_TEST_AUTO_UNBLOCK_THREAD_H_
#include <thread>
#include <functional>
namespace mir
{
namespace test
{
class AutoUnblockThread
{
public:
template<typename Callable, typename... Args>
explicit AutoUnblockThread(std::function<void(void)> const& unblock,
Callable&& f,
Args&&... args)
: unblock{unblock}, thread(f, args...)
{}
~AutoUnblockThread()
{
stop();
}
void stop()
{
unblock();
if (thread.joinable())
thread.join();
}
std::thread::native_handle_type native_handle()
{
return thread.native_handle();
}
private:
std::function<void(void)> unblock;
std::thread thread;
};
/** AutoJoinThread is a convenience AutoUnblockThread when there is
* no need for unblocking anything to join the thread.
*/
class AutoJoinThread : public AutoUnblockThread
{
public:
template<typename Callable, typename... Args>
explicit AutoJoinThread(Callable&& f,
Args&&... args)
: AutoUnblockThread([]{}, f, args...)
{}
};
}
}
#endif
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