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

//

//        clocktruth.cxx

//

//        Clock accuracy test

//

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

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

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

//

// Author(s):     hmt

// Contributors:  hmt

// Date:          2001-06-05

// Description:   Tests the Kernel Real Time Clock for accuracy using a human

// 

//####DESCRIPTIONEND####

// This is for a human to watch to sanity check the clock rate.

// It's easier to see what's happening if you enable this:

#define nRUNFOREVER

#include <pkgconf/kernel.h>

#include <cyg/kernel/clock.hxx>

#include <cyg/kernel/sema.hxx>

#include <cyg/kernel/thread.hxx>

#include <cyg/infra/testcase.h>

#include <cyg/kernel/clock.inl>

#include <cyg/kernel/thread.inl>

#ifdef CYGVAR_KERNEL_COUNTERS_CLOCK

#include <cyg/infra/diag.h>

#define NTHREADS 1

#include "testaux.hxx"

#ifdef RUNFOREVER

#define ENDPOINT 8192

#else

#define ENDPOINT 20

#endif

static cyg_alarm_fn alarmfunc;

static void alarmfunc( Cyg_Alarm *alarm, CYG_ADDRWORD data )

{

    Cyg_Binary_Semaphore *sp = (Cyg_Binary_Semaphore *)data;

    sp->post();

}

static void entry0( CYG_ADDRWORD data )

{

    cyg_uint32 now, then;

    int i;

    Cyg_Clock *rtc = Cyg_Clock::real_time_clock;

    Cyg_Binary_Semaphore sema;

    Cyg_Alarm alarm( rtc, &alarmfunc, (CYG_ADDRWORD)&sema );

    // First, print 100 lines as fast as you can, of distinct ticks.

    for ( i = 0; i < 100; i++ ) {

        now = rtc->current_value_lo();

        then = now;

        while ( then == now )

            now = rtc->current_value_lo();

        diag_printf( "INFO<time now %8d>\n", now );

    }

    diag_printf( "INFO<per-second times are: %8d>\n", rtc->current_value_lo() );

    for ( i = 0; i < 20; i++ ) {

        Cyg_Thread::counted_sleep( 100 );

        diag_printf( "INFO<per-second time %2d is %8d>\n",

                     i, rtc->current_value_lo() );

    }

    alarm.initialize( rtc->current_value() + 100, 100 );

    alarm.enable();

    for ( i = 0; i < ENDPOINT; i++ ) {

        sema.wait();

        diag_printf( "INFO<alarm time %2d is %8d>\n",

                     i, rtc->current_value_lo() );

    }

    CYG_TEST_PASS_FINISH("Clock truth OK");

}

void clocktruth_main( void )

{

    CYG_TEST_INIT();

    new_thread(entry0, (CYG_ADDRWORD)&thread_obj[0]);

    Cyg_Scheduler::start();

}

externC void

cyg_start( void )

{

#ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG

    cyg_hal_invoke_constructors();

#endif

    clocktruth_main();

}

#else // def CYGVAR_KERNEL_COUNTERS_CLOCK

externC void

cyg_start( void )

{

    CYG_TEST_INIT();

    CYG_TEST_NA( "Kernel real-time clock disabled");

}

#endif // def CYGVAR_KERNEL_COUNTERS_CLOCK

// EOF clocktruth.cxx