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//==========================================================================
//
// wallclock.cxx
//
// WallClock test
//
//==========================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
//
// 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.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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 v2.
//
// This exception does not invalidate any other reasons why a work based
// on this file might be covered by the GNU General Public 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
#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
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