Quelle  rtl_doublelocking.cxx   Sprache: C

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#include <sal/config.h>

#include <iostream>

#include <sal/types.h>

#include <osl/thread.hxx>

#include <rtl/instance.hxx>
#include <rtl/ustring.hxx>

#include <cppunit/TestFixture.h>
#include <cppunit/extensions/HelperMacros.h>

#ifdef _WIN32
#if !defined WIN32_LEAN_AND_MEAN
# define WIN32_LEAN_AND_MEAN
#endif
#include <windows.h>
#endif

#define CONST_TEST_STRING "gregorian"

namespace {
struct Gregorian : public rtl::StaticWithInit<OUString, Gregorian> {
    OUString operator () () {
        return u"" CONST_TEST_STRING ""_ustr;
    }
};

/** Simple thread for testing Thread-create.
 * Just add 1 of value 0, and after running, result is 1.
 */
class OGetThread : public osl::Thread
{
    osl::Mutex m_mutex;
    sal_Int32 m_nOK;
    sal_Int32 m_nFails;

    OUString m_sConstStr;
public:
    OGetThread()
            :m_nOK(0),
             m_nFails(0),
             m_sConstStr(u"" CONST_TEST_STRING ""_ustr)
        {
        }

    sal_Int32 getOK() { osl::MutexGuard g(m_mutex); return m_nOK; }
    sal_Int32 getFails() {osl::MutexGuard g(m_mutex); return m_nFails;}

protected:

    /** guarded value which initialized 0

        @see ThreadSafeValue
    */
    void SAL_CALL run() override
        {
            for (int i = 0; i != 5; ++i)
            {
                OUString aStr = Gregorian::get();
                if (aStr == m_sConstStr)
                {
                    osl::MutexGuard g(m_mutex);
                    m_nOK++;
                }
                else
                {
                    osl::MutexGuard g(m_mutex);
                    m_nFails++;
                }
            }
        }

public:

    virtual ~OGetThread() override
        {
            if (isRunning())
            {
                printf("error: not terminated.\n");
            }
        }
};

}

namespace rtl_DoubleLocking
{

/** Test of the osl::Thread::create method
 */

    class getValue : public CppUnit::TestFixture
    {
    public:

        void getValue_001()
            {
                OUString aStr = Gregorian::get();

                CPPUNIT_ASSERT_MESSAGE(
                    "Gregorian::get() failed, wrong value expected.",
                    !aStr.isEmpty()
                    );
            }

        /** check 2 threads.

            ALGORITHM:
            Here the function should show, that 2 different threads,
            which only increase a value, should run at the same time with same prio.
            The test fails, if the difference between the two values is more than 5%
            but IMHO this isn't a failure, it's only a feature of the OS.
        */

        void getValue_002()
            {
                // initial 5 threads with different priorities
                OGetThread* pThread = new OGetThread();
                OGetThread* p2Thread = new OGetThread();

                //Create them and start running at the same time
                pThread->create();
                p2Thread->create();

                pThread->join();
                p2Thread->join();

                sal_Int32 nValueOK = pThread->getOK();

                sal_Int32 nValueOK2 = p2Thread->getOK();

                std::cout << "Value in Thread #1 is " << nValueOK << "\n";
                std::cout << "Value in Thread #2 is " << nValueOK2 << "\n";
                sal_Int32 nValueFails = pThread->getFails();

                sal_Int32 nValueFails2 = p2Thread->getFails();

                delete pThread;
                delete p2Thread;

                CPPUNIT_ASSERT_EQUAL(sal_Int32(5), nValueOK);
                CPPUNIT_ASSERT_EQUAL(sal_Int32(5), nValueOK2);
                CPPUNIT_ASSERT_EQUAL(sal_Int32(0), nValueFails);
                CPPUNIT_ASSERT_EQUAL(sal_Int32(0), nValueFails2);
            }

        CPPUNIT_TEST_SUITE(getValue);
        CPPUNIT_TEST(getValue_001);
        CPPUNIT_TEST(getValue_002);
        CPPUNIT_TEST_SUITE_END();
    }; // class create

    CPPUNIT_TEST_SUITE_REGISTRATION(rtl_DoubleLocking::getValue);
} // namespace rtl_DoubleLocking

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