test/TestSemaphore.cpp

/*
 *   This file is part of the Standard Portable Library (SPL).
 *
 *   SPL is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   SPL 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 SPL.  If not, see <http://www.gnu.org/licenses/>.
 */
#include <spl/Debug.h>
#include <spl/Log.h>
#include <spl/threading/Event.h>
#include <spl/Int32.h>
#include <spl/threading/InterlockCounter.h>
#include <spl/threading/Mutex.h>
#include <spl/threading/Semaphore.h>
#include <spl/threading/ThreadStartDelegate.h>

#ifdef DEBUG

class SemaphoreTester
{
private:
        volatile bool m_running;
        Event m_waitForIt;
        InterlockCounter m_count;
        Semaphore m_semaphore;

        ThreadStartDelegate<SemaphoreTester> m_thread1;
        ThreadStartDelegate<SemaphoreTester> m_thread2;
        ThreadStartDelegate<SemaphoreTester> m_thread3;
        ThreadStartDelegate<SemaphoreTester> m_thread4;

public:
        inline SemaphoreTester()
        :       m_thread1(),
                m_thread2(),
                m_thread3(),
                m_thread4(),
                m_count(),
                m_waitForIt(),
                m_semaphore("TST", 3),
                m_running(true)
        {
                m_thread1.Set(this, &SemaphoreTester::RunMe);
                m_thread2.Set(this, &SemaphoreTester::RunMe);
                m_thread3.Set(this, &SemaphoreTester::RunMe);
                m_thread4.Set(this, &SemaphoreTester::RunMe);

                m_thread1.Start();
                m_thread2.Start();
                m_thread3.Start();
                m_thread4.Start();
        }

        inline ~SemaphoreTester()
        {
        }

        inline int32 Count()
        {
                return m_count.Get();
        }

        inline void Stop()
        {
                m_running = false;
                m_waitForIt.Notify();

                m_thread1.Join(3000);
                m_thread2.Join(3000);
                m_thread3.Join(3000);
                m_thread4.Join(5000);
        }

private:
        void RunMe()
        {
                m_semaphore.Lock();

                m_count += 1;

                if (m_running)
                {
                        m_waitForIt.Wait();
                }

                m_semaphore.Unlock();
        }
};

static void _TestSemaphore1()
{
        DateTime now = DateTime::Now();

        SemaphoreTester tst;

        while (tst.Count() < 3 && now.AddSeconds(40) < DateTime::Now())
        {
                Thread::Sleep(1000);
        }

        StringPtr msg = String("Should be three threads running ").Cat(Int32::ToString(tst.Count())); 
        UNIT_ASSERT(msg->GetChars(), tst.Count() == 3);

        tst.Stop();

        UNIT_ASSERT("Should be four threads ran", tst.Count() == 4);

        Log::SWriteOkFail( "Semaphore test" );
}

void _TestSemaphore()
{
        _TestSemaphore1();
        DEBUG_CLEAR_MEM_CHECK_POINTS();
        DEBUG_DUMP_MEM_LEAKS();
}

#endif