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/*=================================================================

//

//        kmutex1.c

//

//        Kernel C API Mutex test 1

//

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

// ####ECOSGPLCOPYRIGHTBEGIN####

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

// This file is part of eCos, the Embedded Configurable Operating System.

// Copyright (C) 1998, 1999, 2000, 2001, 2002 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):     dsm

// Contributors:    dsm

// Date:          1998-03-23

// Description:   Tests basic mutex functionality.

// Omissions:     Timed wait.

//####DESCRIPTIONEND####

*/

#include <cyg/hal/hal_arch.h>           // CYGNUM_HAL_STACK_SIZE_TYPICAL

#include <cyg/kernel/kapi.h>

#include <cyg/infra/testcase.h>

#ifdef CYGFUN_KERNEL_API_C

#include "testaux.h"

#define NTHREADS 3

#define STACKSIZE CYGNUM_HAL_STACK_SIZE_TYPICAL

static cyg_handle_t thread[NTHREADS];

static cyg_thread thread_obj[NTHREADS];

static char stack[NTHREADS][STACKSIZE];

static cyg_mutex_t m0, m1;

static cyg_cond_t cvar0, cvar1, cvar2;

static cyg_ucount8 m0d=0, m1d=0;

static void finish( cyg_ucount8 t )

{

    cyg_mutex_lock( &m1 ); {

        m1d |= 1<<t;

        if( 0x7 == m1d )

            CYG_TEST_PASS_FINISH("Kernel C API Mutex 1 OK");

        cyg_cond_wait( &cvar2 );

    } /* cyg_mutex_unlock( &m1 ); */

    CYG_TEST_FAIL_FINISH("Not reached");

}

static void entry0( cyg_addrword_t data )

{

    cyg_mutex_lock( &m0 ); {

        CHECK( ! cyg_mutex_trylock( &m0 ) );

        cyg_mutex_lock( &m1 ); {

            CHECK( ! cyg_mutex_trylock( &m0 ) );

        } cyg_mutex_unlock( &m1 );

    } cyg_mutex_unlock( &m0 );

    cyg_mutex_lock( &m0 ); {

        while ( 0 == m0d )

            cyg_cond_wait( &cvar0 );

        CHECK( 1 == m0d++ );

        cyg_cond_signal( &cvar0 );

        while ( 4 != m0d )

            cyg_cond_wait( &cvar1 );

        CHECK( 4 == m0d );

    } cyg_mutex_unlock( &m0 );

    finish( (cyg_ucount8)data );

}

static void entry1( cyg_addrword_t data )

{

    cyg_mutex_lock( &m0 ); {

        CHECK( cyg_mutex_trylock( &m1 ) ); {

        } cyg_mutex_unlock( &m1 );

    } cyg_mutex_unlock( &m0 );

    cyg_mutex_lock( &m0 ); {

        CHECK( 0 == m0d++ );

        cyg_cond_broadcast( &cvar0 );

    } cyg_mutex_unlock( &m0 );

    cyg_mutex_lock( &m0 ); {

        while( 1 == m0d )

            cyg_cond_wait( &cvar0 );

        CHECK( 2 == m0d++ );

        cyg_cond_signal( &cvar0 );

        while( 3 == m0d )

            cyg_cond_wait( &cvar1 );

    } cyg_mutex_unlock( &m0 );

    finish( (cyg_ucount8)data );

}

static void entry2( cyg_addrword_t data )

{

    cyg_mutex_lock( &m0 ); {

        while( 3 != m0d ) {

            cyg_cond_wait( &cvar0 );

        }

        CHECK( 3 == m0d++ );

        cyg_cond_broadcast( &cvar1 );

    } cyg_mutex_unlock( &m0 );

    finish( (cyg_ucount8)data );

}

void kmutex1_main( void )

{

    CYG_TEST_INIT();

    cyg_thread_create(4, entry0 , (cyg_addrword_t)0, "kmutex1-0",

        (void *)stack[0], STACKSIZE, &thread[0], &thread_obj[0]);

    cyg_thread_resume(thread[0]);

    cyg_thread_create(4, entry1 , (cyg_addrword_t)1, "kmutex1-1",

        (void *)stack[1], STACKSIZE, &thread[1], &thread_obj[1]);

    cyg_thread_resume(thread[1]);

    cyg_thread_create(4, entry2 , (cyg_addrword_t)2, "kmutex1-2",

        (void *)stack[2], STACKSIZE, &thread[2], &thread_obj[2]);

    cyg_thread_resume(thread[2]);

    cyg_mutex_init( &m0 );

    cyg_mutex_init( &m1 );

    cyg_cond_init( &cvar0, &m0 );

    cyg_cond_init( &cvar1, &m0 );

    cyg_cond_init( &cvar2, &m1 );

    cyg_scheduler_start();

    CYG_TEST_FAIL_FINISH("Not reached");

}

externC void

cyg_start( void )

{

    kmutex1_main();

}

#else /* def CYGFUN_KERNEL_API_C */

externC void

cyg_start( void )

{

    CYG_TEST_INIT();

    CYG_TEST_NA("Kernel C API layer disabled");

}

#endif /* def CYGFUN_KERNEL_API_C */

/* EOF kmutex1.c */