//==========================================================================////        wallclock.cxx////        WallClock test////==========================================================================//####ECOSGPLCOPYRIGHTBEGIN####// -------------------------------------------// This file is part of eCos, the Embedded Configurable Operating System.// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.// Copyright (C) 2003 Gary Thomas//// eCos 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 2 or (at your option) any later version.//// eCos 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 eCos; if not, write to the Free Software Foundation, Inc.,// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.//// As a special exception, if other files instantiate templates or use macros// or inline functions from this file, or you compile this file and link it// with other works to produce a work based on this file, this file does not// by itself cause the resulting work to be covered by the GNU General Public// License. However the source code for this file must still be made available// in accordance with section (3) of the GNU General Public License.//// This exception does not invalidate any other reasons why a work based on// this file might be covered by the GNU General Public License.//// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.// at http://sources.redhat.com/ecos/ecos-license/// -------------------------------------------//####ECOSGPLCOPYRIGHTEND####//==========================================================================//#####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#endifchar 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        10cyg_int32 loops = LOOPS_HW;cyg_tick_count one_sec;// -------------------------------------------------------------------------// Thread bodyvoid 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_FLAGexternC voidcyg_hal_invoke_constructors();#endifexternC voidcyg_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 voidcyg_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