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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Source/] [include/] [StackMacros.h] - Blame information for rev 572

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1 572 jeremybenn
/*
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    FreeRTOS V6.1.1 - Copyright (C) 2011 Real Time Engineers Ltd.
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    ***************************************************************************
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    *                                                                         *
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    * If you are:                                                             *
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    *                                                                         *
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    *    + New to FreeRTOS,                                                   *
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    *    + Wanting to learn FreeRTOS or multitasking in general quickly       *
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    *    + Looking for basic training,                                        *
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    *    + Wanting to improve your FreeRTOS skills and productivity           *
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    *                                                                         *
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    * then take a look at the FreeRTOS books - available as PDF or paperback  *
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    *                                                                         *
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    *        "Using the FreeRTOS Real Time Kernel - a Practical Guide"        *
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    *                  http://www.FreeRTOS.org/Documentation                  *
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    *                                                                         *
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    * A pdf reference manual is also available.  Both are usually delivered   *
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    * to your inbox within 20 minutes to two hours when purchased between 8am *
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    * and 8pm GMT (although please allow up to 24 hours in case of            *
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    * exceptional circumstances).  Thank you for your support!                *
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    *                                                                         *
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    ***************************************************************************
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    This file is part of the FreeRTOS distribution.
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    FreeRTOS is free software; you can redistribute it and/or modify it under
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    the terms of the GNU General Public License (version 2) as published by the
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    Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
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    ***NOTE*** The exception to the GPL is included to allow you to distribute
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    a combined work that includes FreeRTOS without being obliged to provide the
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    source code for proprietary components outside of the FreeRTOS kernel.
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    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT
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    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
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    more details. You should have received a copy of the GNU General Public
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    License and the FreeRTOS license exception along with FreeRTOS; if not it
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    can be viewed here: http://www.freertos.org/a00114.html and also obtained
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    by writing to Richard Barry, contact details for whom are available on the
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    FreeRTOS WEB site.
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    1 tab == 4 spaces!
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    http://www.FreeRTOS.org - Documentation, latest information, license and
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    contact details.
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    http://www.SafeRTOS.com - A version that is certified for use in safety
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    critical systems.
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    http://www.OpenRTOS.com - Commercial support, development, porting,
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    licensing and training services.
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*/
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#ifndef STACK_MACROS_H
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#define STACK_MACROS_H
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/*
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 * Call the stack overflow hook function if the stack of the task being swapped
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 * out is currently overflowed, or looks like it might have overflowed in the
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 * past.
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 *
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 * Setting configCHECK_FOR_STACK_OVERFLOW to 1 will cause the macro to check
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 * the current stack state only - comparing the current top of stack value to
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 * the stack limit.  Setting configCHECK_FOR_STACK_OVERFLOW to greater than 1
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 * will also cause the last few stack bytes to be checked to ensure the value
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 * to which the bytes were set when the task was created have not been
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 * overwritten.  Note this second test does not guarantee that an overflowed
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 * stack will always be recognised.
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 */
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/*-----------------------------------------------------------*/
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#if( configCHECK_FOR_STACK_OVERFLOW == 0 )
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        /* FreeRTOSConfig.h is not set to check for stack overflows. */
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        #define taskFIRST_CHECK_FOR_STACK_OVERFLOW()
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        #define taskSECOND_CHECK_FOR_STACK_OVERFLOW()
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#endif /* configCHECK_FOR_STACK_OVERFLOW == 0 */
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/*-----------------------------------------------------------*/
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#if( configCHECK_FOR_STACK_OVERFLOW == 1 )
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        /* FreeRTOSConfig.h is only set to use the first method of
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        overflow checking. */
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        #define taskSECOND_CHECK_FOR_STACK_OVERFLOW()
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#endif
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/*-----------------------------------------------------------*/
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#if( ( configCHECK_FOR_STACK_OVERFLOW > 0 ) && ( portSTACK_GROWTH < 0 ) )
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        /* Only the current stack state is to be checked. */
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        #define taskFIRST_CHECK_FOR_STACK_OVERFLOW()                                                                                                            \
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        {                                                                                                                                                                                                       \
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        extern void vApplicationStackOverflowHook( xTaskHandle *pxTask, signed char *pcTaskName );                      \
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                                                                                                                                                                                                                \
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                /* Is the currently saved stack pointer within the stack limit? */                                                              \
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                if( pxCurrentTCB->pxTopOfStack <= pxCurrentTCB->pxStack )                                                                               \
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                {                                                                                                                                                                                               \
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                        vApplicationStackOverflowHook( ( xTaskHandle ) pxCurrentTCB, pxCurrentTCB->pcTaskName );        \
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                }                                                                                                                                                                                               \
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        }
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#endif /* configCHECK_FOR_STACK_OVERFLOW > 0 */
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/*-----------------------------------------------------------*/
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#if( ( configCHECK_FOR_STACK_OVERFLOW > 0 ) && ( portSTACK_GROWTH > 0 ) )
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        /* Only the current stack state is to be checked. */
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        #define taskFIRST_CHECK_FOR_STACK_OVERFLOW()                                                                                                            \
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        {                                                                                                                                                                                                       \
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        extern void vApplicationStackOverflowHook( xTaskHandle *pxTask, signed char *pcTaskName );                      \
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                                                                                                                                                                                                                \
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                /* Is the currently saved stack pointer within the stack limit? */                                                              \
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                if( pxCurrentTCB->pxTopOfStack >= pxCurrentTCB->pxEndOfStack )                                                                  \
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                {                                                                                                                                                                                               \
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                        vApplicationStackOverflowHook( ( xTaskHandle ) pxCurrentTCB, pxCurrentTCB->pcTaskName );        \
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                }                                                                                                                                                                                               \
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        }
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#endif /* configCHECK_FOR_STACK_OVERFLOW == 1 */
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/*-----------------------------------------------------------*/
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#if( ( configCHECK_FOR_STACK_OVERFLOW > 1 ) && ( portSTACK_GROWTH < 0 ) )
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        #define taskSECOND_CHECK_FOR_STACK_OVERFLOW()                                                                                                                                                                                                   \
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        {                                                                                                                                                                                                                                                                                               \
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        extern void vApplicationStackOverflowHook( xTaskHandle *pxTask, signed char *pcTaskName );                                                                                                              \
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        static const unsigned char ucExpectedStackBytes[] = {   tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE,                 \
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                                                                                                                                tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE,         \
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                                                                                                                                tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE,         \
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                                                                                                                                tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE,         \
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                                                                                                                                tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE };       \
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                                                                                                                                                                                                                                                                                                        \
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                                                                                                                                                                                                                                                                                                        \
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                /* Has the extremity of the task stack ever been written over? */                                                                                                                                                       \
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                if( memcmp( ( void * ) pxCurrentTCB->pxStack, ( void * ) ucExpectedStackBytes, sizeof( ucExpectedStackBytes ) ) != 0 )                                           \
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                {                                                                                                                                                                                                                                                                                       \
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                        vApplicationStackOverflowHook( ( xTaskHandle ) pxCurrentTCB, pxCurrentTCB->pcTaskName );                                                                                                \
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                }                                                                                                                                                                                                                                                                                       \
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        }
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#endif /* #if( configCHECK_FOR_STACK_OVERFLOW > 1 ) */
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/*-----------------------------------------------------------*/
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#if( ( configCHECK_FOR_STACK_OVERFLOW > 1 ) && ( portSTACK_GROWTH > 0 ) )
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        #define taskSECOND_CHECK_FOR_STACK_OVERFLOW()                                                                                                                                                                                                   \
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        {                                                                                                                                                                                                                                                                                               \
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        extern void vApplicationStackOverflowHook( xTaskHandle *pxTask, signed char *pcTaskName );                                                                                                              \
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        char *pcEndOfStack = ( char * ) pxCurrentTCB->pxEndOfStack;                                                                                                                                                                             \
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        static const unsigned char ucExpectedStackBytes[] = {   tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE,                 \
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                                                                                                                                tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE,         \
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                                                                                                                                tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE,         \
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                                                                                                                                tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE,         \
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                                                                                                                                tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE };       \
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                                                                                                                                                                                                                                                                                                        \
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                                                                                                                                                                                                                                                                                                        \
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                pcEndOfStack -= sizeof( ucExpectedStackBytes );                                                                                                                                                                                         \
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                                                                                                                                                                                                                                                                                                        \
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                /* Has the extremity of the task stack ever been written over? */                                                                                                                                                       \
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                if( memcmp( ( void * ) pcEndOfStack, ( void * ) ucExpectedStackBytes, sizeof( ucExpectedStackBytes ) ) != 0 )                                                            \
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                {                                                                                                                                                                                                                                                                                       \
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                        vApplicationStackOverflowHook( ( xTaskHandle ) pxCurrentTCB, pxCurrentTCB->pcTaskName );                                                                                                \
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                }                                                                                                                                                                                                                                                                                       \
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        }
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#endif /* #if( configCHECK_FOR_STACK_OVERFLOW > 1 ) */
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/*-----------------------------------------------------------*/
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#endif /* STACK_MACROS_H */
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