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/*
    FreeRTOS V6.1.1 - Copyright (C) 2011 Real Time Engineers Ltd.
 
    ***************************************************************************
    *                                                                         *
    * If you are:                                                             *
    *                                                                         *
    *    + New to FreeRTOS,                                                   *
    *    + Wanting to learn FreeRTOS or multitasking in general quickly       *
    *    + Looking for basic training,                                        *
    *    + Wanting to improve your FreeRTOS skills and productivity           *
    *                                                                         *
    * then take a look at the FreeRTOS books - available as PDF or paperback  *
    *                                                                         *
    *        "Using the FreeRTOS Real Time Kernel - a Practical Guide"        *
    *                  http://www.FreeRTOS.org/Documentation                  *
    *                                                                         *
    * A pdf reference manual is also available.  Both are usually delivered   *
    * to your inbox within 20 minutes to two hours when purchased between 8am *
    * and 8pm GMT (although please allow up to 24 hours in case of            *
    * exceptional circumstances).  Thank you for your support!                *
    *                                                                         *
    ***************************************************************************
 
    This file is part of the FreeRTOS distribution.
 
    FreeRTOS is free software; you can redistribute it and/or modify it under
    the terms of the GNU General Public License (version 2) as published by the
    Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
    ***NOTE*** The exception to the GPL is included to allow you to distribute
    a combined work that includes FreeRTOS without being obliged to provide the
    source code for proprietary components outside of the FreeRTOS kernel.
    FreeRTOS 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 and the FreeRTOS license exception along with FreeRTOS; if not it
    can be viewed here: http://www.freertos.org/a00114.html and also obtained
    by writing to Richard Barry, contact details for whom are available on the
    FreeRTOS WEB site.
 
    1 tab == 4 spaces!
 
    http://www.FreeRTOS.org - Documentation, latest information, license and
    contact details.
 
    http://www.SafeRTOS.com - A version that is certified for use in safety
    critical systems.
 
    http://www.OpenRTOS.com - Commercial support, development, porting,
    licensing and training services.
*/
 
/*
 * This file contains some test scenarios that ensure tasks do not exit queue
 * send or receive functions prematurely.  A description of the tests is
 * included within the code.
 */
 
/* Kernel includes. */
#include "FreeRTOS.h"
#include "task.h"
#include "queue.h"
 
/* Demo includes. */
#include "blocktim.h"
 
/* Task priorities.  Allow these to be overridden. */
#ifndef bktPRIMARY_PRIORITY
        #define bktPRIMARY_PRIORITY                     ( 3 )
#endif
 
#ifndef bktSECONDARY_PRIORITY
        #define bktSECONDARY_PRIORITY           ( 2 )
#endif
 
/* Task behaviour. */
#define bktQUEUE_LENGTH                         ( 5 )
#define bktSHORT_WAIT                           ( ( ( portTickType ) 20 ) / portTICK_RATE_MS )
#define bktPRIMARY_BLOCK_TIME           ( 10 )
#define bktALLOWABLE_MARGIN                     ( 15 )
#define bktTIME_TO_BLOCK                        ( 175 )
#define bktDONT_BLOCK                           ( ( portTickType ) 0 )
#define bktRUN_INDICATOR                        ( ( unsigned portBASE_TYPE ) 0x55 )
 
/* The queue on which the tasks block. */
static xQueueHandle xTestQueue;
 
/* Handle to the secondary task is required by the primary task for calls
to vTaskSuspend/Resume(). */
static xTaskHandle xSecondary;
 
/* Used to ensure that tasks are still executing without error. */
static volatile portBASE_TYPE xPrimaryCycles = 0, xSecondaryCycles = 0;
static volatile portBASE_TYPE xErrorOccurred = pdFALSE;
 
/* Provides a simple mechanism for the primary task to know when the
secondary task has executed. */
static volatile unsigned portBASE_TYPE xRunIndicator;
 
/* The two test tasks.  Their behaviour is commented within the files. */
static void vPrimaryBlockTimeTestTask( void *pvParameters );
static void vSecondaryBlockTimeTestTask( void *pvParameters );
 
/*-----------------------------------------------------------*/
 
void vCreateBlockTimeTasks( void )
{
        /* Create the queue on which the two tasks block. */
    xTestQueue = xQueueCreate( bktQUEUE_LENGTH, sizeof( portBASE_TYPE ) );
 
        /* vQueueAddToRegistry() adds the queue to the queue registry, if one is
        in use.  The queue registry is provided as a means for kernel aware
        debuggers to locate queues and has no purpose if a kernel aware debugger
        is not being used.  The call to vQueueAddToRegistry() will be removed
        by the pre-processor if configQUEUE_REGISTRY_SIZE is not defined or is
        defined to be less than 1. */
        vQueueAddToRegistry( xTestQueue, ( signed char * ) "Block_Time_Queue" );
 
        /* Create the two test tasks. */
        xTaskCreate( vPrimaryBlockTimeTestTask, ( signed char * )"BTest1", configMINIMAL_STACK_SIZE, NULL, bktPRIMARY_PRIORITY, NULL );
        xTaskCreate( vSecondaryBlockTimeTestTask, ( signed char * )"BTest2", configMINIMAL_STACK_SIZE, NULL, bktSECONDARY_PRIORITY, &xSecondary );
}
/*-----------------------------------------------------------*/
 
static void vPrimaryBlockTimeTestTask( void *pvParameters )
{
portBASE_TYPE xItem, xData;
portTickType xTimeWhenBlocking;
portTickType xTimeToBlock, xBlockedTime;
 
        ( void ) pvParameters;
 
        for( ;; )
        {
                /*********************************************************************
        Test 1
 
        Simple block time wakeup test on queue receives. */
                for( xItem = 0; xItem < bktQUEUE_LENGTH; xItem++ )
                {
                        /* The queue is empty. Attempt to read from the queue using a block
                        time.  When we wake, ensure the delta in time is as expected. */
                        xTimeToBlock = bktPRIMARY_BLOCK_TIME << xItem;
 
                        xTimeWhenBlocking = xTaskGetTickCount();
 
                        /* We should unblock after xTimeToBlock having not received
                        anything on the queue. */
                        if( xQueueReceive( xTestQueue, &xData, xTimeToBlock ) != errQUEUE_EMPTY )
                        {
                                xErrorOccurred = pdTRUE;
                        }
 
                        /* How long were we blocked for? */
                        xBlockedTime = xTaskGetTickCount() - xTimeWhenBlocking;
 
                        if( xBlockedTime < xTimeToBlock )
                        {
                                /* Should not have blocked for less than we requested. */
                                xErrorOccurred = pdTRUE;
                        }
 
                        if( xBlockedTime > ( xTimeToBlock + bktALLOWABLE_MARGIN ) )
                        {
                                /* Should not have blocked for longer than we requested,
                                although we would not necessarily run as soon as we were
                                unblocked so a margin is allowed. */
                                xErrorOccurred = pdTRUE;
                        }
                }
 
                /*********************************************************************
        Test 2
 
        Simple block time wakeup test on queue sends.
 
                First fill the queue.  It should be empty so all sends should pass. */
                for( xItem = 0; xItem < bktQUEUE_LENGTH; xItem++ )
                {
                        if( xQueueSend( xTestQueue, &xItem, bktDONT_BLOCK ) != pdPASS )
                        {
                                xErrorOccurred = pdTRUE;
                        }
 
                        #if configUSE_PREEMPTION == 0
                                taskYIELD();
                        #endif
                }
 
                for( xItem = 0; xItem < bktQUEUE_LENGTH; xItem++ )
                {
                        /* The queue is full. Attempt to write to the queue using a block
                        time.  When we wake, ensure the delta in time is as expected. */
                        xTimeToBlock = bktPRIMARY_BLOCK_TIME << xItem;
 
                        xTimeWhenBlocking = xTaskGetTickCount();
 
                        /* We should unblock after xTimeToBlock having not received
                        anything on the queue. */
                        if( xQueueSend( xTestQueue, &xItem, xTimeToBlock ) != errQUEUE_FULL )
                        {
                                xErrorOccurred = pdTRUE;
                        }
 
                        /* How long were we blocked for? */
                        xBlockedTime = xTaskGetTickCount() - xTimeWhenBlocking;
 
                        if( xBlockedTime < xTimeToBlock )
                        {
                                /* Should not have blocked for less than we requested. */
                                xErrorOccurred = pdTRUE;
                        }
 
                        if( xBlockedTime > ( xTimeToBlock + bktALLOWABLE_MARGIN ) )
                        {
                                /* Should not have blocked for longer than we requested,
                                although we would not necessarily run as soon as we were
                                unblocked so a margin is allowed. */
                                xErrorOccurred = pdTRUE;
                        }
                }
 
                /*********************************************************************
        Test 3
 
                Wake the other task, it will block attempting to post to the queue.
                When we read from the queue the other task will wake, but before it
                can run we will post to the queue again.  When the other task runs it
                will find the queue still full, even though it was woken.  It should
                recognise that its block time has not expired and return to block for
                the remains of its block time.
 
                Wake the other task so it blocks attempting to post to the already
                full queue. */
                xRunIndicator = 0;
                vTaskResume( xSecondary );
 
                /* We need to wait a little to ensure the other task executes. */
                while( xRunIndicator != bktRUN_INDICATOR )
                {
                        /* The other task has not yet executed. */
                        vTaskDelay( bktSHORT_WAIT );
                }
                /* Make sure the other task is blocked on the queue. */
                vTaskDelay( bktSHORT_WAIT );
                xRunIndicator = 0;
 
                for( xItem = 0; xItem < bktQUEUE_LENGTH; xItem++ )
                {
                        /* Now when we make space on the queue the other task should wake
                        but not execute as this task has higher priority. */
                        if( xQueueReceive( xTestQueue, &xData, bktDONT_BLOCK ) != pdPASS )
                        {
                                xErrorOccurred = pdTRUE;
                        }
 
                        /* Now fill the queue again before the other task gets a chance to
                        execute.  If the other task had executed we would find the queue
                        full ourselves, and the other task have set xRunIndicator. */
                        if( xQueueSend( xTestQueue, &xItem, bktDONT_BLOCK ) != pdPASS )
                        {
                                xErrorOccurred = pdTRUE;
                        }
 
                        if( xRunIndicator == bktRUN_INDICATOR )
                        {
                                /* The other task should not have executed. */
                                xErrorOccurred = pdTRUE;
                        }
 
                        /* Raise the priority of the other task so it executes and blocks
                        on the queue again. */
                        vTaskPrioritySet( xSecondary, bktPRIMARY_PRIORITY + 2 );
 
                        /* The other task should now have re-blocked without exiting the
                        queue function. */
                        if( xRunIndicator == bktRUN_INDICATOR )
                        {
                                /* The other task should not have executed outside of the
                                queue function. */
                                xErrorOccurred = pdTRUE;
                        }
 
                        /* Set the priority back down. */
                        vTaskPrioritySet( xSecondary, bktSECONDARY_PRIORITY );
                }
 
                /* Let the other task timeout.  When it unblockes it will check that it
                unblocked at the correct time, then suspend itself. */
                while( xRunIndicator != bktRUN_INDICATOR )
                {
                        vTaskDelay( bktSHORT_WAIT );
                }
                vTaskDelay( bktSHORT_WAIT );
                xRunIndicator = 0;
 
 
                /*********************************************************************
        Test 4
 
                As per test 3 - but with the send and receive the other way around.
                The other task blocks attempting to read from the queue.
 
                Empty the queue.  We should find that it is full. */
                for( xItem = 0; xItem < bktQUEUE_LENGTH; xItem++ )
                {
                        if( xQueueReceive( xTestQueue, &xData, bktDONT_BLOCK ) != pdPASS )
                        {
                                xErrorOccurred = pdTRUE;
                        }
                }
 
                /* Wake the other task so it blocks attempting to read from  the
                already empty queue. */
                vTaskResume( xSecondary );
 
                /* We need to wait a little to ensure the other task executes. */
                while( xRunIndicator != bktRUN_INDICATOR )
                {
                        vTaskDelay( bktSHORT_WAIT );
                }
                vTaskDelay( bktSHORT_WAIT );
                xRunIndicator = 0;
 
                for( xItem = 0; xItem < bktQUEUE_LENGTH; xItem++ )
                {
                        /* Now when we place an item on the queue the other task should
                        wake but not execute as this task has higher priority. */
                        if( xQueueSend( xTestQueue, &xItem, bktDONT_BLOCK ) != pdPASS )
                        {
                                xErrorOccurred = pdTRUE;
                        }
 
                        /* Now empty the queue again before the other task gets a chance to
                        execute.  If the other task had executed we would find the queue
                        empty ourselves, and the other task would be suspended. */
                        if( xQueueReceive( xTestQueue, &xData, bktDONT_BLOCK ) != pdPASS )
                        {
                                xErrorOccurred = pdTRUE;
                        }
 
                        if( xRunIndicator == bktRUN_INDICATOR )
                        {
                                /* The other task should not have executed. */
                                xErrorOccurred = pdTRUE;
                        }
 
                        /* Raise the priority of the other task so it executes and blocks
                        on the queue again. */
                        vTaskPrioritySet( xSecondary, bktPRIMARY_PRIORITY + 2 );
 
                        /* The other task should now have re-blocked without exiting the
                        queue function. */
                        if( xRunIndicator == bktRUN_INDICATOR )
                        {
                                /* The other task should not have executed outside of the
                                queue function. */
                                xErrorOccurred = pdTRUE;
                        }
                        vTaskPrioritySet( xSecondary, bktSECONDARY_PRIORITY );
                }
 
                /* Let the other task timeout.  When it unblockes it will check that it
                unblocked at the correct time, then suspend itself. */
                while( xRunIndicator != bktRUN_INDICATOR )
                {
                        vTaskDelay( bktSHORT_WAIT );
                }
                vTaskDelay( bktSHORT_WAIT );
 
                xPrimaryCycles++;
        }
}
/*-----------------------------------------------------------*/
 
static void vSecondaryBlockTimeTestTask( void *pvParameters )
{
portTickType xTimeWhenBlocking, xBlockedTime;
portBASE_TYPE xData;
 
        ( void ) pvParameters;
 
        for( ;; )
        {
                /*********************************************************************
        Test 1 and 2
 
                This task does does not participate in these tests. */
                vTaskSuspend( NULL );
 
                /*********************************************************************
        Test 3
 
                The first thing we do is attempt to read from the queue.  It should be
                full so we block.  Note the time before we block so we can check the
                wake time is as per that expected. */
                xTimeWhenBlocking = xTaskGetTickCount();
 
                /* We should unblock after bktTIME_TO_BLOCK having not sent
                anything to the queue. */
                xData = 0;
                xRunIndicator = bktRUN_INDICATOR;
                if( xQueueSend( xTestQueue, &xData, bktTIME_TO_BLOCK ) != errQUEUE_FULL )
                {
                        xErrorOccurred = pdTRUE;
                }
 
                /* How long were we inside the send function? */
                xBlockedTime = xTaskGetTickCount() - xTimeWhenBlocking;
 
                /* We should not have blocked for less time than bktTIME_TO_BLOCK. */
                if( xBlockedTime < bktTIME_TO_BLOCK )
                {
                        xErrorOccurred = pdTRUE;
                }
 
                /* We should of not blocked for much longer than bktALLOWABLE_MARGIN
                either.  A margin is permitted as we would not necessarily run as
                soon as we unblocked. */
                if( xBlockedTime > ( bktTIME_TO_BLOCK + bktALLOWABLE_MARGIN ) )
                {
                        xErrorOccurred = pdTRUE;
                }
 
                /* Suspend ready for test 3. */
                xRunIndicator = bktRUN_INDICATOR;
                vTaskSuspend( NULL );
 
                /*********************************************************************
        Test 4
 
                As per test three, but with the send and receive reversed. */
                xTimeWhenBlocking = xTaskGetTickCount();
 
                /* We should unblock after bktTIME_TO_BLOCK having not received
                anything on the queue. */
                xRunIndicator = bktRUN_INDICATOR;
                if( xQueueReceive( xTestQueue, &xData, bktTIME_TO_BLOCK ) != errQUEUE_EMPTY )
                {
                        xErrorOccurred = pdTRUE;
                }
 
                xBlockedTime = xTaskGetTickCount() - xTimeWhenBlocking;
 
                /* We should not have blocked for less time than bktTIME_TO_BLOCK. */
                if( xBlockedTime < bktTIME_TO_BLOCK )
                {
                        xErrorOccurred = pdTRUE;
                }
 
                /* We should of not blocked for much longer than bktALLOWABLE_MARGIN
                either.  A margin is permitted as we would not necessarily run as soon
                as we unblocked. */
                if( xBlockedTime > ( bktTIME_TO_BLOCK + bktALLOWABLE_MARGIN ) )
                {
                        xErrorOccurred = pdTRUE;
                }
 
                xRunIndicator = bktRUN_INDICATOR;
 
                xSecondaryCycles++;
        }
}
/*-----------------------------------------------------------*/
 
portBASE_TYPE xAreBlockTimeTestTasksStillRunning( void )
{
static portBASE_TYPE xLastPrimaryCycleCount = 0, xLastSecondaryCycleCount = 0;
portBASE_TYPE xReturn = pdPASS;
 
        /* Have both tasks performed at least one cycle since this function was
        last called? */
        if( xPrimaryCycles == xLastPrimaryCycleCount )
        {
                xReturn = pdFAIL;
        }
 
        if( xSecondaryCycles == xLastSecondaryCycleCount )
        {
                xReturn = pdFAIL;
        }
 
        if( xErrorOccurred == pdTRUE )
        {
                xReturn = pdFAIL;
        }
 
        xLastSecondaryCycleCount = xSecondaryCycles;
        xLastPrimaryCycleCount = xPrimaryCycles;
 
        return xReturn;
}

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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [Common/] [Minimal/] [blocktim.c] - Blame information for rev 790

Line No.	Rev	Author	Line
1	606	jeremybenn	`/*`
2			`FreeRTOS V6.1.1 - Copyright (C) 2011 Real Time Engineers Ltd.`
3
4			`***************************************************************************`
5			`* *`
6			`* If you are: *`
7			`* *`
8			`* + New to FreeRTOS, *`
9			`* + Wanting to learn FreeRTOS or multitasking in general quickly *`
10			`* + Looking for basic training, *`
11			`* + Wanting to improve your FreeRTOS skills and productivity *`
12			`* *`
13			`* then take a look at the FreeRTOS books - available as PDF or paperback *`
14			`* *`
15			`* "Using the FreeRTOS Real Time Kernel - a Practical Guide" *`
16			`* http://www.FreeRTOS.org/Documentation *`
17			`* *`
18			`* A pdf reference manual is also available. Both are usually delivered *`
19			`* to your inbox within 20 minutes to two hours when purchased between 8am *`
20			`* and 8pm GMT (although please allow up to 24 hours in case of *`
21			`* exceptional circumstances). Thank you for your support! *`
22			`* *`
23			`***************************************************************************`
24
25			`This file is part of the FreeRTOS distribution.`
26
27			`FreeRTOS is free software; you can redistribute it and/or modify it under`
28			`the terms of the GNU General Public License (version 2) as published by the`
29			`Free Software Foundation AND MODIFIED BY the FreeRTOS exception.`
30			`*NOTE* The exception to the GPL is included to allow you to distribute`
31			`a combined work that includes FreeRTOS without being obliged to provide the`
32			`source code for proprietary components outside of the FreeRTOS kernel.`
33			`FreeRTOS is distributed in the hope that it will be useful, but WITHOUT`
34			`ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or`
35			`FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for`
36			`more details. You should have received a copy of the GNU General Public`
37			`License and the FreeRTOS license exception along with FreeRTOS; if not it`
38			`can be viewed here: http://www.freertos.org/a00114.html and also obtained`
39			`by writing to Richard Barry, contact details for whom are available on the`
40			`FreeRTOS WEB site.`
41
42			`1 tab == 4 spaces!`
43
44			`http://www.FreeRTOS.org - Documentation, latest information, license and`
45			`contact details.`
46
47			`http://www.SafeRTOS.com - A version that is certified for use in safety`
48			`critical systems.`
49
50			`http://www.OpenRTOS.com - Commercial support, development, porting,`
51			`licensing and training services.`
52			`*/`
53
54			`/*`
55			`* This file contains some test scenarios that ensure tasks do not exit queue`
56			`* send or receive functions prematurely. A description of the tests is`
57			`* included within the code.`
58			`*/`
59
60			`/* Kernel includes. */`
61			`#include "FreeRTOS.h"`
62			`#include "task.h"`
63			`#include "queue.h"`
64
65			`/* Demo includes. */`
66			`#include "blocktim.h"`
67
68			`/* Task priorities. Allow these to be overridden. */`
69			`#ifndef bktPRIMARY_PRIORITY`
70			`#define bktPRIMARY_PRIORITY ( 3 )`
71			`#endif`
72
73			`#ifndef bktSECONDARY_PRIORITY`
74			`#define bktSECONDARY_PRIORITY ( 2 )`
75			`#endif`
76
77			`/* Task behaviour. */`
78			`#define bktQUEUE_LENGTH ( 5 )`
79			`#define bktSHORT_WAIT ( ( ( portTickType ) 20 ) / portTICK_RATE_MS )`
80			`#define bktPRIMARY_BLOCK_TIME ( 10 )`
81			`#define bktALLOWABLE_MARGIN ( 15 )`
82			`#define bktTIME_TO_BLOCK ( 175 )`
83			`#define bktDONT_BLOCK ( ( portTickType ) 0 )`
84			`#define bktRUN_INDICATOR ( ( unsigned portBASE_TYPE ) 0x55 )`
85
86			`/* The queue on which the tasks block. */`
87			`static xQueueHandle xTestQueue;`
88
89			`/* Handle to the secondary task is required by the primary task for calls`
90			`to vTaskSuspend/Resume(). */`
91			`static xTaskHandle xSecondary;`
92
93			`/* Used to ensure that tasks are still executing without error. */`
94			`static volatile portBASE_TYPE xPrimaryCycles = 0, xSecondaryCycles = 0;`
95			`static volatile portBASE_TYPE xErrorOccurred = pdFALSE;`
96
97			`/* Provides a simple mechanism for the primary task to know when the`
98			`secondary task has executed. */`
99			`static volatile unsigned portBASE_TYPE xRunIndicator;`
100
101			`/* The two test tasks. Their behaviour is commented within the files. */`
102			`static void vPrimaryBlockTimeTestTask( void *pvParameters );`
103			`static void vSecondaryBlockTimeTestTask( void *pvParameters );`
104
105			`/-----------------------------------------------------------/`
106
107			`void vCreateBlockTimeTasks( void )`
108			`{`
109			`/* Create the queue on which the two tasks block. */`
110			`xTestQueue = xQueueCreate( bktQUEUE_LENGTH, sizeof( portBASE_TYPE ) );`
111
112			`/* vQueueAddToRegistry() adds the queue to the queue registry, if one is`
113			`in use. The queue registry is provided as a means for kernel aware`
114			`debuggers to locate queues and has no purpose if a kernel aware debugger`
115			`is not being used. The call to vQueueAddToRegistry() will be removed`
116			`by the pre-processor if configQUEUE_REGISTRY_SIZE is not defined or is`
117			`defined to be less than 1. */`
118			`vQueueAddToRegistry( xTestQueue, ( signed char * ) "Block_Time_Queue" );`
119
120			`/* Create the two test tasks. */`
121			`xTaskCreate( vPrimaryBlockTimeTestTask, ( signed char * )"BTest1", configMINIMAL_STACK_SIZE, NULL, bktPRIMARY_PRIORITY, NULL );`
122			`xTaskCreate( vSecondaryBlockTimeTestTask, ( signed char * )"BTest2", configMINIMAL_STACK_SIZE, NULL, bktSECONDARY_PRIORITY, &xSecondary );`
123			`}`
124			`/-----------------------------------------------------------/`
125
126			`static void vPrimaryBlockTimeTestTask( void *pvParameters )`
127			`{`
128			`portBASE_TYPE xItem, xData;`
129			`portTickType xTimeWhenBlocking;`
130			`portTickType xTimeToBlock, xBlockedTime;`
131
132			`( void ) pvParameters;`
133
134			`for( ;; )`
135			`{`
136			`/*********************************************************************`
137			`Test 1`
138
139			`Simple block time wakeup test on queue receives. */`
140			`for( xItem = 0; xItem < bktQUEUE_LENGTH; xItem++ )`
141			`{`
142			`/* The queue is empty. Attempt to read from the queue using a block`
143			`time. When we wake, ensure the delta in time is as expected. */`
144			`xTimeToBlock = bktPRIMARY_BLOCK_TIME << xItem;`
145
146			`xTimeWhenBlocking = xTaskGetTickCount();`
147
148			`/* We should unblock after xTimeToBlock having not received`
149			`anything on the queue. */`
150			`if( xQueueReceive( xTestQueue, &xData, xTimeToBlock ) != errQUEUE_EMPTY )`
151			`{`
152			`xErrorOccurred = pdTRUE;`
153			`}`
154
155			`/* How long were we blocked for? */`
156			`xBlockedTime = xTaskGetTickCount() - xTimeWhenBlocking;`
157
158			`if( xBlockedTime < xTimeToBlock )`
159			`{`
160			`/* Should not have blocked for less than we requested. */`
161			`xErrorOccurred = pdTRUE;`
162			`}`
163
164			`if( xBlockedTime > ( xTimeToBlock + bktALLOWABLE_MARGIN ) )`
165			`{`
166			`/* Should not have blocked for longer than we requested,`
167			`although we would not necessarily run as soon as we were`
168			`unblocked so a margin is allowed. */`
169			`xErrorOccurred = pdTRUE;`
170			`}`
171			`}`
172
173			`/*********************************************************************`
174			`Test 2`
175
176			`Simple block time wakeup test on queue sends.`
177
178			`First fill the queue. It should be empty so all sends should pass. */`
179			`for( xItem = 0; xItem < bktQUEUE_LENGTH; xItem++ )`
180			`{`
181			`if( xQueueSend( xTestQueue, &xItem, bktDONT_BLOCK ) != pdPASS )`
182			`{`
183			`xErrorOccurred = pdTRUE;`
184			`}`
185
186			`#if configUSE_PREEMPTION == 0`
187			`taskYIELD();`
188			`#endif`
189			`}`
190
191			`for( xItem = 0; xItem < bktQUEUE_LENGTH; xItem++ )`
192			`{`
193			`/* The queue is full. Attempt to write to the queue using a block`
194			`time. When we wake, ensure the delta in time is as expected. */`
195			`xTimeToBlock = bktPRIMARY_BLOCK_TIME << xItem;`
196
197			`xTimeWhenBlocking = xTaskGetTickCount();`
198
199			`/* We should unblock after xTimeToBlock having not received`
200			`anything on the queue. */`
201			`if( xQueueSend( xTestQueue, &xItem, xTimeToBlock ) != errQUEUE_FULL )`
202			`{`
203			`xErrorOccurred = pdTRUE;`
204			`}`
205
206			`/* How long were we blocked for? */`
207			`xBlockedTime = xTaskGetTickCount() - xTimeWhenBlocking;`
208
209			`if( xBlockedTime < xTimeToBlock )`
210			`{`
211			`/* Should not have blocked for less than we requested. */`
212			`xErrorOccurred = pdTRUE;`
213			`}`
214
215			`if( xBlockedTime > ( xTimeToBlock + bktALLOWABLE_MARGIN ) )`
216			`{`
217			`/* Should not have blocked for longer than we requested,`
218			`although we would not necessarily run as soon as we were`
219			`unblocked so a margin is allowed. */`
220			`xErrorOccurred = pdTRUE;`
221			`}`
222			`}`
223
224			`/*********************************************************************`
225			`Test 3`
226
227			`Wake the other task, it will block attempting to post to the queue.`
228			`When we read from the queue the other task will wake, but before it`
229			`can run we will post to the queue again. When the other task runs it`
230			`will find the queue still full, even though it was woken. It should`
231			`recognise that its block time has not expired and return to block for`
232			`the remains of its block time.`
233
234			`Wake the other task so it blocks attempting to post to the already`
235			`full queue. */`
236			`xRunIndicator = 0;`
237			`vTaskResume( xSecondary );`
238
239			`/* We need to wait a little to ensure the other task executes. */`
240			`while( xRunIndicator != bktRUN_INDICATOR )`
241			`{`
242			`/* The other task has not yet executed. */`
243			`vTaskDelay( bktSHORT_WAIT );`
244			`}`
245			`/* Make sure the other task is blocked on the queue. */`
246			`vTaskDelay( bktSHORT_WAIT );`
247			`xRunIndicator = 0;`
248
249			`for( xItem = 0; xItem < bktQUEUE_LENGTH; xItem++ )`
250			`{`
251			`/* Now when we make space on the queue the other task should wake`
252			`but not execute as this task has higher priority. */`
253			`if( xQueueReceive( xTestQueue, &xData, bktDONT_BLOCK ) != pdPASS )`
254			`{`
255			`xErrorOccurred = pdTRUE;`
256			`}`
257
258			`/* Now fill the queue again before the other task gets a chance to`
259			`execute. If the other task had executed we would find the queue`
260			`full ourselves, and the other task have set xRunIndicator. */`
261			`if( xQueueSend( xTestQueue, &xItem, bktDONT_BLOCK ) != pdPASS )`
262			`{`
263			`xErrorOccurred = pdTRUE;`
264			`}`
265
266			`if( xRunIndicator == bktRUN_INDICATOR )`
267			`{`
268			`/* The other task should not have executed. */`
269			`xErrorOccurred = pdTRUE;`
270			`}`
271
272			`/* Raise the priority of the other task so it executes and blocks`
273			`on the queue again. */`
274			`vTaskPrioritySet( xSecondary, bktPRIMARY_PRIORITY + 2 );`
275
276			`/* The other task should now have re-blocked without exiting the`
277			`queue function. */`
278			`if( xRunIndicator == bktRUN_INDICATOR )`
279			`{`
280			`/* The other task should not have executed outside of the`
281			`queue function. */`
282			`xErrorOccurred = pdTRUE;`
283			`}`
284
285			`/* Set the priority back down. */`
286			`vTaskPrioritySet( xSecondary, bktSECONDARY_PRIORITY );`
287			`}`
288
289			`/* Let the other task timeout. When it unblockes it will check that it`
290			`unblocked at the correct time, then suspend itself. */`
291			`while( xRunIndicator != bktRUN_INDICATOR )`
292			`{`
293			`vTaskDelay( bktSHORT_WAIT );`
294			`}`
295			`vTaskDelay( bktSHORT_WAIT );`
296			`xRunIndicator = 0;`
297
298
299			`/*********************************************************************`
300			`Test 4`
301
302			`As per test 3 - but with the send and receive the other way around.`
303			`The other task blocks attempting to read from the queue.`
304
305			`Empty the queue. We should find that it is full. */`
306			`for( xItem = 0; xItem < bktQUEUE_LENGTH; xItem++ )`
307			`{`
308			`if( xQueueReceive( xTestQueue, &xData, bktDONT_BLOCK ) != pdPASS )`
309			`{`
310			`xErrorOccurred = pdTRUE;`
311			`}`
312			`}`
313
314			`/* Wake the other task so it blocks attempting to read from the`
315			`already empty queue. */`
316			`vTaskResume( xSecondary );`
317
318			`/* We need to wait a little to ensure the other task executes. */`
319			`while( xRunIndicator != bktRUN_INDICATOR )`
320			`{`
321			`vTaskDelay( bktSHORT_WAIT );`
322			`}`
323			`vTaskDelay( bktSHORT_WAIT );`
324			`xRunIndicator = 0;`
325
326			`for( xItem = 0; xItem < bktQUEUE_LENGTH; xItem++ )`
327			`{`
328			`/* Now when we place an item on the queue the other task should`
329			`wake but not execute as this task has higher priority. */`
330			`if( xQueueSend( xTestQueue, &xItem, bktDONT_BLOCK ) != pdPASS )`
331			`{`
332			`xErrorOccurred = pdTRUE;`
333			`}`
334
335			`/* Now empty the queue again before the other task gets a chance to`
336			`execute. If the other task had executed we would find the queue`
337			`empty ourselves, and the other task would be suspended. */`
338			`if( xQueueReceive( xTestQueue, &xData, bktDONT_BLOCK ) != pdPASS )`
339			`{`
340			`xErrorOccurred = pdTRUE;`
341			`}`
342
343			`if( xRunIndicator == bktRUN_INDICATOR )`
344			`{`
345			`/* The other task should not have executed. */`
346			`xErrorOccurred = pdTRUE;`
347			`}`
348
349			`/* Raise the priority of the other task so it executes and blocks`
350			`on the queue again. */`
351			`vTaskPrioritySet( xSecondary, bktPRIMARY_PRIORITY + 2 );`
352
353			`/* The other task should now have re-blocked without exiting the`
354			`queue function. */`
355			`if( xRunIndicator == bktRUN_INDICATOR )`
356			`{`
357			`/* The other task should not have executed outside of the`
358			`queue function. */`
359			`xErrorOccurred = pdTRUE;`
360			`}`
361			`vTaskPrioritySet( xSecondary, bktSECONDARY_PRIORITY );`
362			`}`
363
364			`/* Let the other task timeout. When it unblockes it will check that it`
365			`unblocked at the correct time, then suspend itself. */`
366			`while( xRunIndicator != bktRUN_INDICATOR )`
367			`{`
368			`vTaskDelay( bktSHORT_WAIT );`
369			`}`
370			`vTaskDelay( bktSHORT_WAIT );`
371
372			`xPrimaryCycles++;`
373			`}`
374			`}`
375			`/-----------------------------------------------------------/`
376
377			`static void vSecondaryBlockTimeTestTask( void *pvParameters )`
378			`{`
379			`portTickType xTimeWhenBlocking, xBlockedTime;`
380			`portBASE_TYPE xData;`
381
382			`( void ) pvParameters;`
383
384			`for( ;; )`
385			`{`
386			`/*********************************************************************`
387			`Test 1 and 2`
388
389			`This task does does not participate in these tests. */`
390			`vTaskSuspend( NULL );`
391
392			`/*********************************************************************`
393			`Test 3`
394
395			`The first thing we do is attempt to read from the queue. It should be`
396			`full so we block. Note the time before we block so we can check the`
397			`wake time is as per that expected. */`
398			`xTimeWhenBlocking = xTaskGetTickCount();`
399
400			`/* We should unblock after bktTIME_TO_BLOCK having not sent`
401			`anything to the queue. */`
402			`xData = 0;`
403			`xRunIndicator = bktRUN_INDICATOR;`
404			`if( xQueueSend( xTestQueue, &xData, bktTIME_TO_BLOCK ) != errQUEUE_FULL )`
405			`{`
406			`xErrorOccurred = pdTRUE;`
407			`}`
408
409			`/* How long were we inside the send function? */`
410			`xBlockedTime = xTaskGetTickCount() - xTimeWhenBlocking;`
411
412			`/* We should not have blocked for less time than bktTIME_TO_BLOCK. */`
413			`if( xBlockedTime < bktTIME_TO_BLOCK )`
414			`{`
415			`xErrorOccurred = pdTRUE;`
416			`}`
417
418			`/* We should of not blocked for much longer than bktALLOWABLE_MARGIN`
419			`either. A margin is permitted as we would not necessarily run as`
420			`soon as we unblocked. */`
421			`if( xBlockedTime > ( bktTIME_TO_BLOCK + bktALLOWABLE_MARGIN ) )`
422			`{`
423			`xErrorOccurred = pdTRUE;`
424			`}`
425
426			`/* Suspend ready for test 3. */`
427			`xRunIndicator = bktRUN_INDICATOR;`
428			`vTaskSuspend( NULL );`
429
430			`/*********************************************************************`
431			`Test 4`
432
433			`As per test three, but with the send and receive reversed. */`
434			`xTimeWhenBlocking = xTaskGetTickCount();`
435
436			`/* We should unblock after bktTIME_TO_BLOCK having not received`
437			`anything on the queue. */`
438			`xRunIndicator = bktRUN_INDICATOR;`
439			`if( xQueueReceive( xTestQueue, &xData, bktTIME_TO_BLOCK ) != errQUEUE_EMPTY )`
440			`{`
441			`xErrorOccurred = pdTRUE;`
442			`}`
443
444			`xBlockedTime = xTaskGetTickCount() - xTimeWhenBlocking;`
445
446			`/* We should not have blocked for less time than bktTIME_TO_BLOCK. */`
447			`if( xBlockedTime < bktTIME_TO_BLOCK )`
448			`{`
449			`xErrorOccurred = pdTRUE;`
450			`}`
451
452			`/* We should of not blocked for much longer than bktALLOWABLE_MARGIN`
453			`either. A margin is permitted as we would not necessarily run as soon`
454			`as we unblocked. */`
455			`if( xBlockedTime > ( bktTIME_TO_BLOCK + bktALLOWABLE_MARGIN ) )`
456			`{`
457			`xErrorOccurred = pdTRUE;`
458			`}`
459
460			`xRunIndicator = bktRUN_INDICATOR;`
461
462			`xSecondaryCycles++;`
463			`}`
464			`}`
465			`/-----------------------------------------------------------/`
466
467			`portBASE_TYPE xAreBlockTimeTestTasksStillRunning( void )`
468			`{`
469			`static portBASE_TYPE xLastPrimaryCycleCount = 0, xLastSecondaryCycleCount = 0;`
470			`portBASE_TYPE xReturn = pdPASS;`
471
472			`/* Have both tasks performed at least one cycle since this function was`
473			`last called? */`
474			`if( xPrimaryCycles == xLastPrimaryCycleCount )`
475			`{`
476			`xReturn = pdFAIL;`
477			`}`
478
479			`if( xSecondaryCycles == xLastSecondaryCycleCount )`
480			`{`
481			`xReturn = pdFAIL;`
482			`}`
483
484			`if( xErrorOccurred == pdTRUE )`
485			`{`
486			`xReturn = pdFAIL;`
487			`}`
488
489			`xLastSecondaryCycleCount = xSecondaryCycles;`
490			`xLastPrimaryCycleCount = xPrimaryCycles;`
491
492			`return xReturn;`
493			`}`