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//==========================================================================

//

//        wallclock.cxx

//

//        WallClock test

//

//==========================================================================

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//==========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):     nickg

// Contributors:    nickg

// Date:          1998-07-20

// Description:   Tests the Kernel Wall Clock

//                This test exercises the WallClock class and checks that it

//                keeps time correctly.

//####DESCRIPTIONEND####

// -------------------------------------------------------------------------

#include <pkgconf/hal.h>

#include <pkgconf/kernel.h>

#include <cyg/kernel/thread.hxx>

#include <cyg/kernel/thread.inl>

#include <cyg/kernel/sched.hxx>

#include <cyg/kernel/mutex.hxx>

#include <cyg/kernel/sema.hxx>

#include <cyg/kernel/clock.hxx>

#include <cyg/kernel/diag.h>

#include <cyg/io/wallclock.hxx>         // The WallClock API

#include <cyg/infra/testcase.h>

#if defined(CYGFUN_KERNEL_THREADS_TIMER) && \

    defined(CYGVAR_KERNEL_COUNTERS_CLOCK)

#include <cyg/kernel/sched.inl>

// -------------------------------------------------------------------------

// Data for the test

#ifdef CYGNUM_HAL_STACK_SIZE_TYPICAL

#define STACKSIZE CYGNUM_HAL_STACK_SIZE_TYPICAL

#else

#define STACKSIZE       (2*1024)        // size of thread stack

#endif

char thread_stack[STACKSIZE];

inline void *operator new(size_t size, void *ptr) { return ptr; };

// array of threads.

char thread[sizeof(Cyg_Thread)];

Cyg_Thread *th;

// MN10300 sim takes 1min15secs to do one loop on 300MHz PII.

#define LOOPS_SIM       2

#define LOOPS_HW        10

cyg_int32 loops = LOOPS_HW;

cyg_tick_count one_sec;

// -------------------------------------------------------------------------

// Thread body

void wallclock_thread( CYG_ADDRWORD id )

{

    cyg_uint32 base;

    cyg_uint32 wtime;

    cyg_tick_count ticks;

    cyg_bool ok = true;

    CYG_TEST_INFO("Testing accuracy of wallclock (10 seconds silence)");

    // Check clock only every other second since the call itself may

    // take about a second.

    // Start by synchronizing to next wallclock increment, then wait for

    // a bit to get away from the exact time of the increment (or minor

    // inaccuracies in the HW clock will cause failures).

    wtime = Cyg_WallClock::wallclock->get_current_time();

    do {

        base = Cyg_WallClock::wallclock->get_current_time();

    } while (base == wtime);

    th->delay( one_sec/10 );

    for( int i = 0; i < loops; i += 2 )

    {

        // Make a note of the time

        ticks = Cyg_Clock::real_time_clock->current_value();

        wtime = Cyg_WallClock::wallclock->get_current_time();

        if(wtime != base+i)

        {

            diag_printf("offset %d, read %d, expected %d\n", i, wtime, base+i);

            ok = false;

        }

        // then calculate how much the above took so the delay

        // below can be made accurate.

        ticks = Cyg_Clock::real_time_clock->current_value() - ticks;

        th->delay( 2*one_sec - ticks );

    }

    if ( ! cyg_test_is_simulator ) {

        CYG_TEST_INFO("Tick output. Two seconds between each output.");

        // Start by synchronizing to next wallclock increment, then

        // wait for a bit to get away from the exact time of the

        // increment (or minor inaccuracies in the HW clock will cause

        // failures).

        wtime = Cyg_WallClock::wallclock->get_current_time();

        do {

            base = Cyg_WallClock::wallclock->get_current_time();

        } while (base == wtime);

        th->delay( one_sec/10 );

        for( int i = 0; i < loops; i += 2 )

        {

            // Make a note of the time

            ticks = Cyg_Clock::real_time_clock->current_value();

            wtime = Cyg_WallClock::wallclock->get_current_time();

            if(wtime != base+i)

            {

                diag_printf("wallclock drift: saw %d expected %d\n",

                            wtime, base+i);

            }

            CYG_TEST_STILL_ALIVE(i, "2xtick...");

            // then calculate how much the above took so the delay

            // below can be made accurate.

            ticks = Cyg_Clock::real_time_clock->current_value() - ticks;

            th->delay( 2*one_sec - ticks );

        }

    }

    if (ok)

        CYG_TEST_PASS_FINISH("Wallclock OK");

    else

        CYG_TEST_FAIL_FINISH( "Clock out of sync" );

}

// -------------------------------------------------------------------------

#ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG

externC void

cyg_hal_invoke_constructors();

#endif

externC void

cyg_start( void )

{

#ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG

    cyg_hal_invoke_constructors();

#endif

    CYG_TEST_INIT();

    // Dont run this test if we are in a simulator, it just takes far too long.

    if( cyg_test_is_simulator )

        CYG_TEST_NA("Wallclock test takes too long in simulators");

    CYG_TEST_INFO("Starting wallclock test");

    Cyg_Clock::cyg_resolution res = Cyg_Clock::real_time_clock->get_resolution();

    one_sec = ( res.divisor * 1000000000LL ) / res.dividend ;

    th = new((void *)&thread) Cyg_Thread(CYG_SCHED_DEFAULT_INFO,

                                         wallclock_thread,

                                         0,

                                         "wallclock_thread",

                                         (CYG_ADDRESS)thread_stack,

                                         STACKSIZE

        );

    th->resume();

    // Get the world going

    Cyg_Scheduler::scheduler.start();

}

#else // if defined(CYGFUN_KERNEL_THREADS_TIMER) etc...

externC void

cyg_start( void )

{

    CYG_TEST_INIT();

    CYG_TEST_NA("Kernel real-time clock/threads timer disabled");

}

#endif // if defined(CYGFUN_KERNEL_THREADS_TIMER) etc...

// -------------------------------------------------------------------------

// EOF wallclock.cxx