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

//

//      testintr.c

//

//      uITRON "C" test program for ixxx_yyy interrupt safe operators

//

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

//####ECOSGPLCOPYRIGHTBEGIN####

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

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

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

// 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):   hmt

// Contributors:hmt

// Date:        1998-08-20

// Purpose:     uITRON API testing

// Description: 

//

//####DESCRIPTIONEND####

//

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

#include <pkgconf/system.h>

#include <pkgconf/uitron.h>             // uITRON setup CYGNUM_UITRON_SEMAS

                                        // CYGPKG_UITRON et al

#include <cyg/infra/testcase.h>         // testing infrastructure

#ifdef CYGPKG_UITRON                    // we DO want the uITRON package

#ifdef CYGSEM_KERNEL_SCHED_MLQUEUE      // we DO want prioritized threads

#ifdef CYGFUN_KERNEL_THREADS_TIMER      // we DO want timout-able calls

#ifdef CYGVAR_KERNEL_COUNTERS_CLOCK     // we DO want the realtime clock

// we're OK if it's C++ or neither of those two is defined:

#if defined( __cplusplus ) || \

    (!defined( CYGIMP_UITRON_INLINE_FUNCS ) && \

     !defined( CYGIMP_UITRON_CPP_OUTLINE_FUNCS) )

// =================== TEST CONFIGURATION ===================

#if \

    /* test configuration for enough tasks */                      \

    (CYGNUM_UITRON_TASKS >= 4)                                  && \

    (CYGNUM_UITRON_TASKS < 90)                                  && \

    (CYGNUM_UITRON_START_TASKS == 1)                            && \

    ( !defined(CYGPKG_UITRON_TASKS_CREATE_DELETE) ||               \

      CYGNUM_UITRON_TASKS_INITIALLY >= 4             )          && \

                                                                   \

    /* the end of the large #if statement */                       \

    1

// ============================ END ============================

#include <cyg/hal/hal_arch.h>

#include <cyg/hal/hal_intr.h>

#include <cyg/infra/diag.h>

#include <cyg/compat/uitron/uit_func.h> // uITRON

#include <cyg/compat/uitron/uit_ifnc.h> // uITRON interrupt funcs

void set_interrupt_number( void );

unsigned int clock_interrupt = 0;

externC void

cyg_package_start( void )

{

    CYG_TEST_INIT();

    CYG_TEST_INFO( "Calling cyg_uitron_start()" );

    set_interrupt_number();

    cyg_uitron_start();

}

extern "C" {

    void task1( unsigned int arg );

    void task2( unsigned int arg );

    void task3( unsigned int arg );

    void task4( unsigned int arg );

}

volatile int intercom = 0;

INT scratch = 0;

// Plan: replace (by direct intervention) the ISR and DSR of the regular

// timer interrupt; be sure to ack the clock intr using the appropriate hal

// macros.

// 

// The new ISR(s) will simply use the interrupt-safe signalling functions

// to control a 2nd task.  Main task will check on the state thereof.

//

// We must test the ixxx_yyy() funcs with the scheduler already locked

// also, by direct sched calls on the KAPI.  This must verify that the

// signal only happens when the scheduler unlocks.

// 

// The 4 producer ops are:

//     iwup_tsk ( ID tskid );

//     isig_sem ( ID semid );

//     iset_flg ( ID flgid, UINT setptn );

//     isnd_msg ( ID mbxid, T_MSG *pk_msg );

//

// and return macros are:

//     ret_wup( ID tskid );

//     ret_int();

//

// These ISRs perform the producer ops on all available objects in turn.

// Tasks 2-4

// Semas 1-4

// Flags 1-4 with marching bit data; they'll all be set to 0x1ff eventually

// Mboxes 1-4 with an arbitrary pointer

enum {

    NOTHING = 0,

    SLP,

    SEM,

    FLG,

    MBX,

    EXIT

};

#define ACK_CLOCK() CYG_MACRO_START                             \

    HAL_CLOCK_RESET( CYGNUM_HAL_INTERRUPT_RTC,                  \

                     CYGNUM_KERNEL_COUNTERS_RTC_PERIOD );       \

    HAL_INTERRUPT_ACKNOWLEDGE( CYGNUM_HAL_INTERRUPT_RTC );      \

CYG_MACRO_END

#define CHECK_TID() CYG_MACRO_START                     \

    int my_tid;                                         \

    ER ercd;                                            \

    ercd = get_tid( &my_tid );                          \

    CYG_TEST_CHECK( E_OK == ercd, "get_tid bad ercd" ); \

    CYG_TEST_CHECK( 0 == my_tid, "tid not 0 in ISR" );  \

CYG_MACRO_END

unsigned int

isr_wup_tsk( unsigned int vector, unsigned int data )

{

    // Hit TASKS in range 2..4

    static int wtid = 2;

    ACK_CLOCK();

    CHECK_TID();

    iwup_tsk( wtid );

    wtid++;

    if ( 5 == wtid ) wtid = 2;

    ret_int();

}

unsigned int

isr_ret_wup( unsigned int vector, unsigned int data )

{

    // Hit TASKS in range 2..4

    static int rwid = 2;

    ACK_CLOCK();

    CHECK_TID();

    rwid++;

    if ( 6 == rwid ) rwid = 3;

    ret_wup( rwid - 1 );

}

unsigned int

isr_sig_sem( unsigned int vector, unsigned int data )

{

    // Hit SEMAS in range 1..3

    static int ssid = 1;

    ACK_CLOCK();

    CHECK_TID();

    isig_sem( ssid );

    ssid++;

    if ( ssid == 4 ) ssid = 1;

    ret_int();

}

unsigned int

isr_set_flg( unsigned int vector, unsigned int data )

{

    // Hit FLAGS in range 1..4

    static int sfid = 1;

    static int sfdata = 0xff;

    ACK_CLOCK();

    CHECK_TID();

    iset_flg( sfid, sfdata );

    sfid++;

    if ( sfid == 5 ) sfid = 1;

//    sfdata <<= 1;

//    if ( sfdata == 0x20 ) sfdata = 1; // so that eventually all 0x1f set

    ret_int();

}

unsigned int

isr_snd_msg( unsigned int vector, unsigned int data )

{

    // Hit MBOXES in range 1..4

    static int smid = 1;

    ACK_CLOCK();

    CHECK_TID();

    isnd_msg( smid, (T_MSG *)&smid );

    smid++;

    if ( smid == 5 ) smid = 1;

    ret_int();

}

void attach_isr( unsigned int (*isr)(unsigned int, unsigned int) );

void detach_isr( unsigned int (*isr)(unsigned int, unsigned int) );

void lock_sched( void );

void unlock_sched( void );

volatile int count = -1;

/*

#define BIGDELAY  50000000

#define SMALLDELAY (BIGDELAY/SMALLLOOPS)

#define SMALLLOOPS 3

#define xxxLONGDELAY()                                     \

do {                                                    \

    int i;                                              \

    for ( i = 0; i < BIGDELAY; i++ )                    \

        if ( wakeups[ 4 ] > prewups[ 4 ] + 99 ) break;  \

} while ( 0 )

#define xxxDELAYLOCKSCHED()                                        \

do {                                                            \

    int i,j;                                                    \

    for ( j = 0; j < SMALLLOOPS; j++ ) {                        \

        lock_sched();                                           \

        for ( i = 0; i < SMALLDELAY; i++ )                      \

            if ( wakeups[ 4 ] > prewups[ 4 ] + 99 ) break;      \

        unlock_sched();                                         \

        if ( wakeups[ 4 ] > prewups[ 4 ] + 99 ) break;          \

    }                                                           \

} while ( 0 )

*/

#define SMALLDELAYHW  (5000000)

#define EVENTSHW      (     20)

#define SMALLDELAYSIM ( 100000)

#define EVENTSSIM     (      4)

#define SMALLDELAY (smalldelay)

#define EVENTS     (events)

static int smalldelay = SMALLDELAYHW;

static int events     = EVENTSHW;

#define LONGDELAY() do {                                        \

    count = 0;                                                  \

    do count++; while ( wakeups[ 4 ] < prewups[ 4 ] + EVENTS ); \

} while ( 0 )

#define DELAYLOCKSCHED()                                              \

do {                                                                  \

    count = 0;                                                        \

    int i;                                                            \

    do {                                                              \

        lock_sched();                                                 \

        for ( i = 0; i < SMALLDELAY; i++ ) {                          \

            count++;                                                  \

            if ( wakeups[ 4 ] >= prewups[ 4 ] + EVENTS )              \

                break;                                                \

        }                                                             \

        unlock_sched();                                               \

        CYG_TEST_INFO("  [Still iterating, please wait....]  ");      \

    } while ( wakeups[ 4 ] < prewups[ 4 ] + EVENTS );                 \

} while ( 0 )

#define DELAY()                                 \

if ( 1 & loops )                                \

    DELAYLOCKSCHED();                           \

else                                            \

    LONGDELAY();

volatile int wakeups[ 5 ] = { 0,0,0,0,0 };

volatile int prewups[ 5 ] = { 0,0,0,0,0 };

void task1( unsigned int arg )

{

    ER ercd;

    int loops;

    CYG_TEST_INFO( "Task 1 running" );

    if ( cyg_test_is_simulator ) {

        // take less time

        events     = EVENTSSIM;

    }

    // First test that dis_int() and ena_int() work for the clock interrupt

#ifdef CYGSEM_UITRON_BAD_PARAMS_RETURN_ERRORS

    ercd = ena_int( 123456789 ); // Hope this is large enough to error

    CYG_TEST_CHECK( E_PAR == ercd, "ena_int bad ercd !E_PAR" );

    ercd = dis_int( 123456789 );

    CYG_TEST_CHECK( E_PAR == ercd, "dis_int bad ercd !E_PAR" );

#endif

    // This may take too long on a sim...

    // On the synthetic target this test cannot run reliably - the

    // loop counting assumes exclusive access to the processor.

#ifndef CYGPKG_HAL_SYNTH    

    if ( ! cyg_test_is_simulator ) {

        SYSTIME t1, t2;

        CYG_TEST_INFO( "Testing masking of clock interrupt" );

        ercd = get_tim( &t1 );

        CYG_TEST_CHECK( E_OK == ercd, "get_tim bad ercd" );

        // Wait for a tick. This loop acts as a synchronizer for the loop

        // below, ensuring that it starts just after a tick.

        for ( loops = 0; loops < 10000000; loops++ ) {

            ercd = get_tim( &t2 );

            CYG_TEST_CHECK( E_OK == ercd, "get_tim bad ercd" );

            if ( t2 != t1 )

                break;

        }

        // Wait for next tick. Reset loops counter so we get the

        // approximate loop count of one clock tick.

        for ( loops = 0; loops < 10000000; loops++ ) {

            ercd = get_tim( &t1 );

            CYG_TEST_CHECK( E_OK == ercd, "get_tim bad ercd" );

            if ( t2 != t1 )

                break;

        }

        // save how many loops could be executed in one tick. Multiply

        // with 3 : we run loops in pairs below and add the time of

        // one extra to avoid small variations to trigger failures.

        intercom = loops * 3;

        ercd = ena_int( clock_interrupt ); // was initialized already

        CYG_TEST_CHECK( E_OK == ercd, "ena_int bad ercd" );

        ercd = get_tim( &t1 );

        CYG_TEST_CHECK( E_OK == ercd, "get_tim bad ercd" );

        // Wait for a tick

        for ( loops = intercom; loops > 0; loops-- ) {

            ercd = get_tim( &t2 );

            CYG_TEST_CHECK( E_OK == ercd, "get_tim bad ercd" );

            if ( t2 != t1 )

                break;

        }

        CYG_TEST_CHECK( 0 < loops, "No first tick" );

        // and a second one

        for (                 ; loops > 0; loops-- ) {

            ercd = get_tim( &t1 );

            CYG_TEST_CHECK( E_OK == ercd, "get_tim bad ercd" );

            if ( t2 != t1 )

                break;

        }

        CYG_TEST_CHECK( 0 < loops, "No second tick" );

        // The PowerPC cannot disable the timer interrupt (separately).

#ifndef CYGPKG_HAL_POWERPC

        ercd = dis_int( clock_interrupt ); // was initialized already

        CYG_TEST_CHECK( E_OK == ercd, "dis_int bad ercd" );

        ercd = get_tim( &t1 );

        CYG_TEST_CHECK( E_OK == ercd, "get_tim bad ercd" );

        // Wait for a tick (should not happen)

        for ( loops = intercom; loops > 0; loops-- ) {

            ercd = get_tim( &t2 );

            CYG_TEST_CHECK( E_OK == ercd, "get_tim bad ercd" );

            if ( t2 != t1 )

                break;

        }

        CYG_TEST_CHECK( 0 == loops, "A tick occured - should be masked" );

        CYG_TEST_CHECK( t1 == t2, "Times are different" );

        // Now enable it again and ensure all is well:

        ercd = ena_int( clock_interrupt );

        CYG_TEST_CHECK( E_OK == ercd, "ena_int bad ercd" );

#endif

        ercd = get_tim( &t1 );

        CYG_TEST_CHECK( E_OK == ercd, "get_tim bad ercd" );

        // Wait for a tick

        for ( loops = intercom; loops > 0; loops-- ) {

            ercd = get_tim( &t2 );

            CYG_TEST_CHECK( E_OK == ercd, "get_tim bad ercd" );

            if ( t2 != t1 )

                break;

        }

        CYG_TEST_CHECK( 0 < loops, "No first tick" );

        // and a second one

        for (                 ; loops > 0; loops-- ) {

            ercd = get_tim( &t1 );

            CYG_TEST_CHECK( E_OK == ercd, "get_tim bad ercd" );

            if ( t2 != t1 )

                break;

        }

        CYG_TEST_CHECK( 0 < loops, "No second tick" );

        CYG_TEST_PASS( "dis_int(), ena_int() OK" );

    }

#endif

    intercom = 0;

    ercd = get_tid( &scratch );

    CYG_TEST_CHECK( E_OK == ercd, "get_tid bad ercd" );

    CYG_TEST_CHECK( 1 == scratch, "tid not 1" );

    // start all other tasks (our prio is 1 by default)

    ercd = sta_tsk( 2, 222 );

    CYG_TEST_CHECK( E_OK == ercd, "sta_tsk 2 bad ercd" );

    ercd = sta_tsk( 3, 333 );

    CYG_TEST_CHECK( E_OK == ercd, "sta_tsk 3 bad ercd" );

    ercd = sta_tsk( 4, 444 );

    CYG_TEST_CHECK( E_OK == ercd, "sta_tsk 4 bad ercd" );

    // drop pri of other tasks all to 5

    ercd = chg_pri( 2, 5 );

    CYG_TEST_CHECK( E_OK == ercd, "chg_pri 2 bad ercd" );

    ercd = chg_pri( 3, 5 );

    CYG_TEST_CHECK( E_OK == ercd, "chg_pri 3 bad ercd" );

    ercd = chg_pri( 4, 5 );

    CYG_TEST_CHECK( E_OK == ercd, "chg_pri 4 bad ercd" );

    // Test sleep/wakeup

    intercom = SLP;

    // Drop our prio to lower; they will run in turn until asleep

    ercd = chg_pri( 1, 6 );

    CYG_TEST_CHECK( E_OK == ercd, "chg_pri 1 (self) bad ercd" );

    loops = 4;

    do {

        if ( 1 & loops )

            CYG_TEST_INFO( " (toggling scheduler lock) " );

        else

            CYG_TEST_INFO( " (unlocked scheduler) " );

        CYG_TEST_CHECK(          0 == wakeups[0], "init: Wakeups[0] hit" );

        CYG_TEST_CHECK(          0 == wakeups[1], "init: Wakeups[1] hit" );

        CYG_TEST_CHECK( prewups[2] == wakeups[2], "init: Wakeups[2] hit" );

        CYG_TEST_CHECK( prewups[3] == wakeups[3], "init: Wakeups[3] hit" );

        CYG_TEST_CHECK( prewups[4] == wakeups[4], "init: Wakeups[4] hit" );

        // -------- TIMERS AND TIMESLICING DISABLED ---------

        // install an isr that will wake them all up in turn

        attach_isr( isr_wup_tsk );

        DELAY();

        detach_isr( isr_wup_tsk );

        // -------- timers and timeslicing ENABLED ---------

        CYG_TEST_CHECK(         0 == wakeups[0], "iwup_tsk: Wakeups[0] hit" );

        CYG_TEST_CHECK(         0 == wakeups[1], "iwup_tsk: Wakeups[1] hit" );

        CYG_TEST_CHECK( prewups[2] < wakeups[2], "iwup_tsk: Wakeups[2] not hit" );

        CYG_TEST_CHECK( prewups[3] < wakeups[3], "iwup_tsk: Wakeups[3] not hit" );

        CYG_TEST_CHECK( prewups[4] < wakeups[4], "iwup_tsk: Wakeups[4] not hit" );

        diag_printf( "INFO:<(fg loops %10d) thread wakeups : %2d %2d %2d >\n", count,

                     wakeups[2] - prewups[2],

                     wakeups[3] - prewups[3],

                     wakeups[4] - prewups[4] );

        prewups[2] = wakeups[2];

        prewups[3] = wakeups[3];

        prewups[4] = wakeups[4];

        // -------- TIMERS AND TIMESLICING DISABLED ---------

        // install an isr that will wake them all up in turn

        attach_isr( isr_ret_wup );

        DELAY();

        detach_isr( isr_ret_wup );

        // -------- timers and timeslicing ENABLED ---------

        CYG_TEST_CHECK(         0 == wakeups[0], "ret_wup: Wakeups[0] hit" );

        CYG_TEST_CHECK(         0 == wakeups[1], "ret_wup: Wakeups[1] hit" );

        CYG_TEST_CHECK( prewups[2] < wakeups[2], "ret_wup: Wakeups[2] not hit" );

        CYG_TEST_CHECK( prewups[3] < wakeups[3], "ret_wup: Wakeups[3] not hit" );

        CYG_TEST_CHECK( prewups[4] < wakeups[4], "ret_wup: Wakeups[4] not hit" );

        diag_printf( "INFO:<(fg loops %10d) thread ret_wups: %2d %2d %2d >\n", count,

                     wakeups[2] - prewups[2],

                     wakeups[3] - prewups[3],

                     wakeups[4] - prewups[4] );

        prewups[2] = wakeups[2];

        prewups[3] = wakeups[3];

        prewups[4] = wakeups[4];

        // move them on to waiting for a semaphore

        intercom = SEM;

        ercd = wup_tsk( 2 );

        CYG_TEST_CHECK( E_OK == ercd, "wup_tsk(2) bad ercd" );

        ercd = wup_tsk( 3 );

        CYG_TEST_CHECK( E_OK == ercd, "wup_tsk(3) bad ercd" );

        ercd = wup_tsk( 4 );

        CYG_TEST_CHECK( E_OK == ercd, "wup_tsk(4) bad ercd" );

        CYG_TEST_CHECK(              0 == wakeups[0], "wup_tsk: Wakeups[0] hit" );

        CYG_TEST_CHECK(              0 == wakeups[1], "wup_tsk: Wakeups[1] hit" );

        CYG_TEST_CHECK( prewups[2] + 1 == wakeups[2], "wup_tsk: Wakeups[2] not hit" );

        CYG_TEST_CHECK( prewups[3] + 1 == wakeups[3], "wup_tsk: Wakeups[3] not hit" );

        CYG_TEST_CHECK( prewups[4] + 1 == wakeups[4], "wup_tsk: Wakeups[4] not hit" );

        prewups[2] = wakeups[2];

        prewups[3] = wakeups[3];

        prewups[4] = wakeups[4];

        // -------- TIMERS AND TIMESLICING DISABLED ---------

        // install an isr that will wake them all up in turn

        attach_isr( isr_sig_sem );

        DELAY();

        detach_isr( isr_sig_sem );

        // -------- timers and timeslicing ENABLED ---------

        CYG_TEST_CHECK(         0 == wakeups[0], "isig_sem: Wakeups[0] hit" );

        CYG_TEST_CHECK(         0 == wakeups[1], "isig_sem: Wakeups[1] hit" );

        CYG_TEST_CHECK( prewups[2] < wakeups[2], "isig_sem: Wakeups[2] not hit" );

        CYG_TEST_CHECK( prewups[3] < wakeups[3], "isig_sem: Wakeups[3] not hit" );

        CYG_TEST_CHECK( prewups[4] < wakeups[4], "isig_sem: Wakeups[4] not hit" );

        diag_printf( "INFO:<(fg loops %10d) semaphore waits: %2d %2d %2d >\n", count,

                     wakeups[2] - prewups[2],

                     wakeups[3] - prewups[3],

                     wakeups[4] - prewups[4] );

        prewups[2] = wakeups[2];

        prewups[3] = wakeups[3];

        prewups[4] = wakeups[4];

        // move them on to waiting for a flag

        intercom = FLG;

        ercd = sig_sem( 1 );

        CYG_TEST_CHECK( E_OK == ercd, "sig_sem(1) bad ercd" );

        ercd = sig_sem( 2 );

        CYG_TEST_CHECK( E_OK == ercd, "sig_sem(2) bad ercd" );

        ercd = sig_sem( 3 );

        CYG_TEST_CHECK( E_OK == ercd, "sig_sem(3) bad ercd" );

        CYG_TEST_CHECK(              0 == wakeups[0], "sig_sem: Wakeups[0] hit" );

        CYG_TEST_CHECK(              0 == wakeups[1], "sig_sem: Wakeups[1] hit" );

        CYG_TEST_CHECK( prewups[2] + 1 == wakeups[2], "sig_sem: Wakeups[2] not hit" );

        CYG_TEST_CHECK( prewups[3] + 1 == wakeups[3], "sig_sem: Wakeups[3] not hit" );

        CYG_TEST_CHECK( prewups[4] + 1 == wakeups[4], "sig_sem: Wakeups[4] not hit" );

        prewups[2] = wakeups[2];

        prewups[3] = wakeups[3];

        prewups[4] = wakeups[4];

        // -------- TIMERS AND TIMESLICING DISABLED ---------

        // install an isr that will wake them all up in turn

        attach_isr( isr_set_flg );

        DELAY();

        detach_isr( isr_set_flg );

        // -------- timers and timeslicing ENABLED ---------

        CYG_TEST_CHECK(         0 == wakeups[0], "iset_flg: Wakeups[0] hit" );

        CYG_TEST_CHECK(         0 == wakeups[1], "iset_flg: Wakeups[1] hit" );

        CYG_TEST_CHECK( prewups[2] < wakeups[2], "iset_flg: Wakeups[2] not hit" );

        CYG_TEST_CHECK( prewups[3] < wakeups[3], "iset_flg: Wakeups[3] not hit" );

        CYG_TEST_CHECK( prewups[4] < wakeups[4], "iset_flg: Wakeups[4] not hit" );

        diag_printf( "INFO:<(fg loops %10d) flag waits/sets: %2d %2d %2d >\n", count,

                     wakeups[2] - prewups[2],

                     wakeups[3] - prewups[3],

                     wakeups[4] - prewups[4] );

        prewups[2] = wakeups[2];

        prewups[3] = wakeups[3];

        prewups[4] = wakeups[4];

        // move them on to waiting for a message box

        intercom = MBX;

        ercd = set_flg( 2, 0xfff );

        CYG_TEST_CHECK( E_OK == ercd, "set_flg(2) bad ercd" );

        ercd = set_flg( 3, 0xfff );

        CYG_TEST_CHECK( E_OK == ercd, "set_flg(3) bad ercd" );

        ercd = set_flg( 4, 0xfff );

        CYG_TEST_CHECK( E_OK == ercd, "set_flg(4) bad ercd" );

        CYG_TEST_CHECK(              0 == wakeups[0], "set_flg: Wakeups[0] hit" );

        CYG_TEST_CHECK(              0 == wakeups[1], "set_flg: Wakeups[1] hit" );

        CYG_TEST_CHECK( prewups[2] + 1 == wakeups[2], "set_flg: Wakeups[2] not hit" );

        CYG_TEST_CHECK( prewups[3] + 1 == wakeups[3], "set_flg: Wakeups[3] not hit" );

        CYG_TEST_CHECK( prewups[4] + 1 == wakeups[4], "set_flg: Wakeups[4] not hit" );

        prewups[2] = wakeups[2];

        prewups[3] = wakeups[3];

        prewups[4] = wakeups[4];

        // -------- TIMERS AND TIMESLICING DISABLED ---------

        // install an isr that will wake them all up in turn

        attach_isr( isr_snd_msg );

        DELAY();

        detach_isr( isr_snd_msg );

        // -------- timers and timeslicing ENABLED ---------

        CYG_TEST_CHECK(         0 == wakeups[0], "isnd_msg: Wakeups[0] hit" );

        CYG_TEST_CHECK(         0 == wakeups[1], "isnd_msg: Wakeups[1] hit" );

        CYG_TEST_CHECK( prewups[2] < wakeups[2], "isnd_msg: Wakeups[2] not hit" );

        CYG_TEST_CHECK( prewups[3] < wakeups[3], "isnd_msg: Wakeups[3] not hit" );

        CYG_TEST_CHECK( prewups[4] < wakeups[4], "isnd_msg: Wakeups[4] not hit" );

        diag_printf( "INFO:<(fg loops %10d) message rec'pts: %2d %2d %2d >\n", count,

                     wakeups[2] - prewups[2],

                     wakeups[3] - prewups[3],

                     wakeups[4] - prewups[4] );

        prewups[2] = wakeups[2];

        prewups[3] = wakeups[3];

        prewups[4] = wakeups[4];

        // move them on to exiting, all done

        if ( 1 == loops )

            // then we are about to exit

            intercom = EXIT;

        else

            intercom = SLP;