git.sur5r.net Git - freertos/blob - FreeRTOS/Demo/RL78_E2Studio_GCC/src/FreeRTOS_Source/include/StackMacros.h

   1 /*\r
   2     FreeRTOS V7.4.0 - Copyright (C) 2013 Real Time Engineers Ltd.\r
   3 \r
   4     FEATURES AND PORTS ARE ADDED TO FREERTOS ALL THE TIME.  PLEASE VISIT\r
   5     http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.\r
   6 \r
   7     ***************************************************************************\r
   8      *                                                                       *\r
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  10      *    Complete, revised, and edited pdf reference manuals are also       *\r
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  16      *    the FreeRTOS project to continue with its mission of providing     *\r
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  19      *                                                                       *\r
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  22      *    Thank you for using FreeRTOS, and thank you for your support!      *\r
  23      *                                                                       *\r
  24     ***************************************************************************\r
  25 \r
  26 \r
  27     This file is part of the FreeRTOS distribution.\r
  28 \r
  29     FreeRTOS is free software; you can redistribute it and/or modify it under\r
  30     the terms of the GNU General Public License (version 2) as published by the\r
  31     Free Software Foundation AND MODIFIED BY the FreeRTOS exception.\r
  32 \r
  33     >>>>>>NOTE<<<<<< The modification to the GPL is included to allow you to\r
  34     distribute a combined work that includes FreeRTOS without being obliged to\r
  35     provide the source code for proprietary components outside of the FreeRTOS\r
  36     kernel.\r
  37 \r
  38     FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY\r
  39     WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS\r
  40     FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more\r
  41     details. You should have received a copy of the GNU General Public License\r
  42     and the FreeRTOS license exception along with FreeRTOS; if not itcan be\r
  43     viewed here: http://www.freertos.org/a00114.html and also obtained by\r
  44     writing to Real Time Engineers Ltd., contact details for whom are available\r
  45     on the FreeRTOS WEB site.\r
  46 \r
  47     1 tab == 4 spaces!\r
  48 \r
  49     ***************************************************************************\r
  50      *                                                                       *\r
  51      *    Having a problem?  Start by reading the FAQ "My application does   *\r
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  53      *                                                                       *\r
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  56     ***************************************************************************\r
  57 \r
  58 \r
  59     http://www.FreeRTOS.org - Documentation, books, training, latest versions, \r
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  65 \r
  66     http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High \r
  67     Integrity Systems, who sell the code with commercial support, \r
  68     indemnification and middleware, under the OpenRTOS brand.\r
  69     \r
  70     http://www.SafeRTOS.com - High Integrity Systems also provide a safety \r
  71     engineered and independently SIL3 certified version for use in safety and \r
  72     mission critical applications that require provable dependability.\r
  73 */\r
  74 \r
  75 #ifndef STACK_MACROS_H\r
  76 #define STACK_MACROS_H\r
  77 \r
  78 /*\r
  79  * Call the stack overflow hook function if the stack of the task being swapped\r
  80  * out is currently overflowed, or looks like it might have overflowed in the\r
  81  * past.\r
  82  *\r
  83  * Setting configCHECK_FOR_STACK_OVERFLOW to 1 will cause the macro to check\r
  84  * the current stack state only - comparing the current top of stack value to\r
  85  * the stack limit.  Setting configCHECK_FOR_STACK_OVERFLOW to greater than 1\r
  86  * will also cause the last few stack bytes to be checked to ensure the value\r
  87  * to which the bytes were set when the task was created have not been\r
  88  * overwritten.  Note this second test does not guarantee that an overflowed\r
  89  * stack will always be recognised.\r
  90  */\r
  91 \r
  92 /*-----------------------------------------------------------*/\r
  93 \r
  94 #if( configCHECK_FOR_STACK_OVERFLOW == 0 )\r
  95 \r
  96         /* FreeRTOSConfig.h is not set to check for stack overflows. */\r
  97         #define taskFIRST_CHECK_FOR_STACK_OVERFLOW()\r
  98         #define taskSECOND_CHECK_FOR_STACK_OVERFLOW()\r
  99 \r
 100 #endif /* configCHECK_FOR_STACK_OVERFLOW == 0 */\r
 101 /*-----------------------------------------------------------*/\r
 102 \r
 103 #if( configCHECK_FOR_STACK_OVERFLOW == 1 )\r
 104 \r
 105         /* FreeRTOSConfig.h is only set to use the first method of\r
 106         overflow checking. */\r
 107         #define taskSECOND_CHECK_FOR_STACK_OVERFLOW()\r
 108 \r
 109 #endif\r
 110 /*-----------------------------------------------------------*/\r
 111 \r
 112 #if( ( configCHECK_FOR_STACK_OVERFLOW > 0 ) && ( portSTACK_GROWTH < 0 ) )\r
 113 \r
 114         /* Only the current stack state is to be checked. */\r
 115         #define taskFIRST_CHECK_FOR_STACK_OVERFLOW()                                                                                                            \\r
 116         {                                                                                                                                                                                                       \\r
 117                 /* Is the currently saved stack pointer within the stack limit? */                                                              \\r
 118                 if( pxCurrentTCB->pxTopOfStack <= pxCurrentTCB->pxStack )                                                                               \\r
 119                 {                                                                                                                                                                                               \\r
 120                         vApplicationStackOverflowHook( ( xTaskHandle ) pxCurrentTCB, pxCurrentTCB->pcTaskName );        \\r
 121                 }                                                                                                                                                                                               \\r
 122         }\r
 123 \r
 124 #endif /* configCHECK_FOR_STACK_OVERFLOW > 0 */\r
 125 /*-----------------------------------------------------------*/\r
 126 \r
 127 #if( ( configCHECK_FOR_STACK_OVERFLOW > 0 ) && ( portSTACK_GROWTH > 0 ) )\r
 128 \r
 129         /* Only the current stack state is to be checked. */\r
 130         #define taskFIRST_CHECK_FOR_STACK_OVERFLOW()                                                                                                            \\r
 131         {                                                                                                                                                                                                       \\r
 132                                                                                                                                                                                                                 \\r
 133                 /* Is the currently saved stack pointer within the stack limit? */                                                              \\r
 134                 if( pxCurrentTCB->pxTopOfStack >= pxCurrentTCB->pxEndOfStack )                                                                  \\r
 135                 {                                                                                                                                                                                               \\r
 136                         vApplicationStackOverflowHook( ( xTaskHandle ) pxCurrentTCB, pxCurrentTCB->pcTaskName );        \\r
 137                 }                                                                                                                                                                                               \\r
 138         }\r
 139 \r
 140 #endif /* configCHECK_FOR_STACK_OVERFLOW == 1 */\r
 141 /*-----------------------------------------------------------*/\r
 142 \r
 143 #if( ( configCHECK_FOR_STACK_OVERFLOW > 1 ) && ( portSTACK_GROWTH < 0 ) )\r
 144 \r
 145         #define taskSECOND_CHECK_FOR_STACK_OVERFLOW()                                                                                                                                                                                           \\r
 146         {                                                                                                                                                                                                                                                                                       \\r
 147         static const unsigned char ucExpectedStackBytes[] = {   tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE,         \\r
 148                                                                                                                         tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE,         \\r
 149                                                                                                                         tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE,         \\r
 150                                                                                                                         tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE,         \\r
 151                                                                                                                         tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE };       \\r
 152                                                                                                                                                                                                                                                                                                 \\r
 153                                                                                                                                                                                                                                                                                                 \\r
 154                 /* Has the extremity of the task stack ever been written over? */                                                                                                                                               \\r
 155                 if( memcmp( ( void * ) pxCurrentTCB->pxStack, ( void * ) ucExpectedStackBytes, sizeof( ucExpectedStackBytes ) ) != 0 )                                  \\r
 156                 {                                                                                                                                                                                                                                                                               \\r
 157                         vApplicationStackOverflowHook( ( xTaskHandle ) pxCurrentTCB, pxCurrentTCB->pcTaskName );                                                                                        \\r
 158                 }                                                                                                                                                                                                                                                                               \\r
 159         }\r
 160 \r
 161 #endif /* #if( configCHECK_FOR_STACK_OVERFLOW > 1 ) */\r
 162 /*-----------------------------------------------------------*/\r
 163 \r
 164 #if( ( configCHECK_FOR_STACK_OVERFLOW > 1 ) && ( portSTACK_GROWTH > 0 ) )\r
 165 \r
 166         #define taskSECOND_CHECK_FOR_STACK_OVERFLOW()                                                                                                                                                                                           \\r
 167         {                                                                                                                                                                                                                                                                                       \\r
 168         char *pcEndOfStack = ( char * ) pxCurrentTCB->pxEndOfStack;                                                                                                                                                                     \\r
 169         static const unsigned char ucExpectedStackBytes[] = {   tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE,         \\r
 170                                                                                                                         tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE,         \\r
 171                                                                                                                         tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE,         \\r
 172                                                                                                                         tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE,         \\r
 173                                                                                                                         tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE };       \\r
 174                                                                                                                                                                                                                                                                                                 \\r
 175                                                                                                                                                                                                                                                                                                 \\r
 176                 pcEndOfStack -= sizeof( ucExpectedStackBytes );                                                                                                                                                                                 \\r
 177                                                                                                                                                                                                                                                                                                 \\r
 178                 /* Has the extremity of the task stack ever been written over? */                                                                                                                                               \\r
 179                 if( memcmp( ( void * ) pcEndOfStack, ( void * ) ucExpectedStackBytes, sizeof( ucExpectedStackBytes ) ) != 0 )                                                   \\r
 180                 {                                                                                                                                                                                                                                                                               \\r
 181                         vApplicationStackOverflowHook( ( xTaskHandle ) pxCurrentTCB, pxCurrentTCB->pcTaskName );                                                                                        \\r
 182                 }                                                                                                                                                                                                                                                                               \\r
 183         }\r
 184 \r
 185 #endif /* #if( configCHECK_FOR_STACK_OVERFLOW > 1 ) */\r
 186 /*-----------------------------------------------------------*/\r
 187 \r
 188 #endif /* STACK_MACROS_H */\r
 189 \r