/*=================================================================
//
//        ksem1.c
//
//        C API semaphore test 1
//
//==========================================================================
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//
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//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):     dsm
// Contributors:    dsm
// Date:          1998-03-20
// Description:   Tests basic semaphore functionality.
//####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 2
#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_sem_t s0, s1, s2;

static volatile cyg_ucount8 q = 0;

static void entry0( cyg_addrword_t data )
{
    cyg_count32 val;

    cyg_semaphore_wait(&s0);
    CHECK( 1 == q++ );
    cyg_semaphore_post(&s1);
    cyg_semaphore_wait(&s0);
    CHECK( 3 == q++ );
    cyg_semaphore_peek(&s0, &val);
    CHECK( 0 == val);
    CHECK( ! cyg_semaphore_trywait(&s0) );
    cyg_semaphore_post(&s0);
    CHECK( 4 == q++ );
    cyg_semaphore_peek(&s0, &val);
    CHECK( 1 == val);
    cyg_semaphore_post(&s0);
    cyg_semaphore_peek(&s0, &val);
    CHECK( 2 == val);
    cyg_semaphore_post(&s1);
    cyg_semaphore_peek(&s2, &val);
    CHECK( 0 == val);
    cyg_semaphore_wait(&s2);
    CHECK( 6 == q++ );
    CYG_TEST_PASS_FINISH("Kernel C API Semaphore 1 OK");
}

static void entry1( cyg_addrword_t data )
{
    cyg_count32 val;

    cyg_semaphore_peek(&s1, &val);
    CHECK( 2 == val);
    cyg_semaphore_wait(&s1);
    cyg_semaphore_peek(&s1, &val);
    CHECK( 1 == val);
    cyg_semaphore_wait(&s1);
    CHECK( 0 == q++ );
    cyg_semaphore_peek(&s0, &val);
    CHECK( 0 == val);
    cyg_semaphore_post(&s0);
    cyg_semaphore_wait(&s1);
    CHECK( 2 == q++ );
    cyg_semaphore_post(&s0);
    cyg_semaphore_wait(&s1);
    CHECK( 5 == q++ );
    cyg_semaphore_peek(&s0, &val);
    CHECK( 2 == val);
    CHECK( cyg_semaphore_trywait(&s0) );
    cyg_semaphore_peek(&s0, &val);
    CHECK( 1 == val);
    CHECK( cyg_semaphore_trywait(&s0) );
    cyg_semaphore_peek(&s0, &val);
    CHECK( 0 == val);
    cyg_semaphore_post(&s2);
    cyg_semaphore_wait(&s0);
    CYG_TEST_FAIL_FINISH("Not reached");
}

void ksem1_main( void )
{
    CYG_TEST_INIT();

    cyg_semaphore_init( &s0, 0);
    cyg_semaphore_init( &s1, 2);
    cyg_semaphore_init( &s2, 0);

    cyg_thread_create(4, entry0 , (cyg_addrword_t)0, "ksem1-0",
        (void *)stack[0], STACKSIZE,&thread[0], &thread_obj[0]);
    cyg_thread_resume(thread[0]);

    cyg_thread_create(4, entry1 , (cyg_addrword_t)1, "ksem1-1",
        (void *)stack[1], STACKSIZE, &thread[1], &thread_obj[1]);
    cyg_thread_resume(thread[1]);

    cyg_scheduler_start();

    CYG_TEST_FAIL_FINISH("Not reached");
}

externC void
cyg_start( void )
{ 
    ksem1_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 ksem1.c */