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/*
Minetest
Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "test.h"
#include <atomic>
#include "threading/semaphore.h"
#include "threading/thread.h"
class TestThreading : public TestBase {
public:
TestThreading() { TestManager::registerTestModule(this); }
const char *getName() { return "TestThreading"; }
void runTests(IGameDef *gamedef);
void testStartStopWait();
void testAtomicSemaphoreThread();
};
static TestThreading g_test_instance;
void TestThreading::runTests(IGameDef *gamedef)
{
TEST(testStartStopWait);
TEST(testAtomicSemaphoreThread);
}
class SimpleTestThread : public Thread {
public:
SimpleTestThread(unsigned int interval) :
Thread("SimpleTest"),
m_interval(interval)
{
}
private:
void *run()
{
void *retval = this;
if (isCurrentThread() == false)
retval = (void *)0xBAD;
while (!stopRequested())
sleep_ms(m_interval);
return retval;
}
unsigned int m_interval;
};
void TestThreading::testStartStopWait()
{
void *thread_retval;
SimpleTestThread *thread = new SimpleTestThread(25);
// Try this a couple times, since a Thread should be reusable after waiting
for (size_t i = 0; i != 5; i++) {
// Can't wait() on a joined, stopped thread
UASSERT(thread->wait() == false);
// start() should work the first time, but not the second.
UASSERT(thread->start() == true);
UASSERT(thread->start() == false);
UASSERT(thread->isRunning() == true);
UASSERT(thread->isCurrentThread() == false);
// Let it loop a few times...
sleep_ms(70);
// It's still running, so the return value shouldn't be available to us.
UASSERT(thread->getReturnValue(&thread_retval) == false);
// stop() should always succeed
UASSERT(thread->stop() == true);
// wait() only needs to wait the first time - the other two are no-ops.
UASSERT(thread->wait() == true);
UASSERT(thread->wait() == false);
UASSERT(thread->wait() == false);
// Now that the thread is stopped, we should be able to get the
// return value, and it should be the object itself.
thread_retval = NULL;
UASSERT(thread->getReturnValue(&thread_retval) == true);
UASSERT(thread_retval == thread);
}
delete thread;
}
class AtomicTestThread : public Thread {
public:
AtomicTestThread(std::atomic<u32> &v, Semaphore &trigger) :
Thread("AtomicTest"),
val(v),
trigger(trigger)
{
}
private:
void *run()
{
trigger.wait();
for (u32 i = 0; i < 0x10000; ++i)
++val;
return NULL;
}
std::atomic<u32> &val;
Semaphore &trigger;
};
void TestThreading::testAtomicSemaphoreThread()
{
std::atomic<u32> val;
val = 0;
Semaphore trigger;
static const u8 num_threads = 4;
AtomicTestThread *threads[num_threads];
for (auto &thread : threads) {
thread = new AtomicTestThread(val, trigger);
UASSERT(thread->start());
}
trigger.post(num_threads);
for (AtomicTestThread *thread : threads) {
thread->wait();
delete thread;
}
UASSERT(val == num_threads * 0x10000);
}
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