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

//

//        thread2.cxx

//

//        Thread test 2

//

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

//####ECOSGPLCOPYRIGHTBEGIN####

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

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

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.

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// or inline functions from this file, or you compile this file and link it

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//####ECOSGPLCOPYRIGHTEND####

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

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

//

// Author(s):     dsm

// Contributors:    dsm

// Date:          1998-02-19

// Description:

//    tests scheduler & threads & priorities

//    + create multiple threads with various priorities

//    + check highest priority running thread is always running

//    + check next highest runs when highest suspended

//    + check several threads of equal priority share time

//      (only !CYGINT_KERNEL_SCHEDULER_UNIQUE_PRIORITIES)

//    + check other threads are starved

//    + check setting priority dynamically causes a thread to

//      become/stay current/non-current

// Omissions:

//     check yield

//     check can set threads with min and max priority

// Options:

//    CYGINT_KERNEL_SCHEDULER_UNIQUE_PRIORITIES

//    CYGIMP_THREAD_PRIORITY

//    CYGNUM_KERNEL_SCHED_PRIORITIES

//    CYGSEM_KERNEL_SCHED_BITMAP

//    CYGSEM_KERNEL_SCHED_MLQUEUE

//####DESCRIPTIONEND####

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

#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/infra/testcase.h>

#include <cyg/kernel/sched.inl>

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

#if defined(CYGIMP_THREAD_PRIORITY) && \

    !defined(CYGPKG_KERNEL_SMP_SUPPORT)

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

static Cyg_Counting_Semaphore s0, s1, s2;

static volatile cyg_ucount8 q = 0;

static Cyg_Thread *thread0, *thread1, *thread2;

#define NTHREADS 3

#include "testaux.hxx"

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

static void entry0( CYG_ADDRWORD data )

{

    CHECK(  0 == q++ );

    s0.wait();

    CHECK(  3 == q++ );

    s1.post();

    CHECK(  4 == q++ );

    s0.wait();

    s0.wait();

    CYG_TEST_PASS_FINISH("Thread 2 OK");

}

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

static void entry1( CYG_ADDRWORD data )

{

    CHECK(  1 == q++ );

    s1.wait();

    CHECK(  5 == q++ );

    thread0->set_priority(9);

    s0.post();

    CHECK(  6 == q++ );

    thread2->set_priority(3);

    CHECK(  8 == q++ );

    s2.post();

    CHECK( 12 == q++ );

    CHECK( 9 == thread0->get_priority() );

    CHECK( 6 == thread1->get_priority() );

    CHECK( 7 == thread2->get_priority() );

    q = 100;

#if !(CYGINT_KERNEL_SCHEDULER_UNIQUE_PRIORITIES) \

    && defined(CYGSEM_KERNEL_SCHED_TIMESLICE)

    thread2->set_priority(6);

    CHECK( 6 == thread1->get_priority() );

    CHECK( 6 == thread2->get_priority() );

    while ( 100 == q )

        ;

    CHECK( 101 == q++ );

    s1.wait();

    CHECK( 103 == q++ );

#endif

    s0.post();

    s1.wait();

}

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

static void entry2( CYG_ADDRWORD data )

{

    CHECK(  2 == q++ );

    s0.post();

    CHECK(  7 == q++ );

    s2.wait();

    CHECK(  9 == q++ );

    thread1->set_priority(6);

    CHECK( 10 == q++ );

    thread2->set_priority(2);

    CHECK( 11 == q++ );

    thread2->set_priority(7);

#if !(CYGINT_KERNEL_SCHEDULER_UNIQUE_PRIORITIES) \

    && defined(CYGSEM_KERNEL_SCHED_TIMESLICE)

    CHECK( 6 == thread1->get_priority() );

    CHECK( 6 == thread2->get_priority() );

    CHECK( 100 == q++ );

    while ( 101 == q )

        ;

    CHECK( 102 == q++ );

    s1.post();

#endif

    s0.post();

    s2.wait();

}

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

void thread2_main( void )

{

    CYG_TEST_INIT();

    thread0 = new_thread( entry0, 0 );

    thread1 = new_thread( entry1, 1 );

    thread2 = new_thread( entry2, 2 );

    thread0->resume();

    thread1->resume();

    thread2->resume();

    thread0->set_priority(5);

    thread1->set_priority(6);

    thread2->set_priority(7);

    if( 9 >= CYG_THREAD_MIN_PRIORITY )

        CYG_TEST_FAIL_FINISH("Test requires priorities up to 9");

    if( 2 <= CYG_THREAD_MAX_PRIORITY )

        CYG_TEST_FAIL_FINISH("Test requires priorities as low as 2");

    Cyg_Scheduler::start();

    CYG_TEST_FAIL_FINISH("Unresolved");

}

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

externC void

cyg_start( void )

{

#ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG

    cyg_hal_invoke_constructors();

#endif

    thread2_main();

}

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

#else // CYGPKG_KERNEL_SMP_SUPPORT etc

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

externC void

cyg_start( void )

{

    CYG_TEST_INIT();

    CYG_TEST_PASS_FINISH("Thread2 test requires:\n"

                         "defined(CYGIMP_THREAD_PRIORITY) &&\n"

                         "!defined(CYGPKG_KERNEL_SMP_SUPPORT)\n");

}

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

#endif // CYGPKG_KERNEL_SMP_SUPPORT etc

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

// EOF thread2.cxx