/* | |
FreeRTOS V7.6.0 - Copyright (C) 2013 Real Time Engineers Ltd. | |
All rights reserved | |
VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION. | |
*************************************************************************** | |
* * | |
* FreeRTOS provides completely free yet professionally developed, * | |
* robust, strictly quality controlled, supported, and cross * | |
* platform software that has become a de facto standard. * | |
* * | |
* Help yourself get started quickly and support the FreeRTOS * | |
* project by purchasing a FreeRTOS tutorial book, reference * | |
* manual, or both from: http://www.FreeRTOS.org/Documentation * | |
* * | |
* Thank you! * | |
* * | |
*************************************************************************** | |
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 modification 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. Full license text is available from the following | |
link: http://www.freertos.org/a00114.html | |
1 tab == 4 spaces! | |
*************************************************************************** | |
* * | |
* Having a problem? Start by reading the FAQ "My application does * | |
* not run, what could be wrong?" * | |
* * | |
* http://www.FreeRTOS.org/FAQHelp.html * | |
* * | |
*************************************************************************** | |
http://www.FreeRTOS.org - Documentation, books, training, latest versions, | |
license and Real Time Engineers Ltd. contact details. | |
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products, | |
including FreeRTOS+Trace - an indispensable productivity tool, a DOS | |
compatible FAT file system, and our tiny thread aware UDP/IP stack. | |
http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High | |
Integrity Systems to sell under the OpenRTOS brand. Low cost OpenRTOS | |
licenses offer ticketed support, indemnification and middleware. | |
http://www.SafeRTOS.com - High Integrity Systems also provide a safety | |
engineered and independently SIL3 certified version for use in safety and | |
mission critical applications that require provable dependability. | |
1 tab == 4 spaces! | |
*/ | |
/* | |
* The simplest possible implementation of pvPortMalloc(). Note that this | |
* implementation does NOT allow allocated memory to be freed again. | |
* | |
* See heap_2.c, heap_3.c and heap_4.c for alternative implementations, and the | |
* memory management pages of http://www.FreeRTOS.org for more information. | |
*/ | |
#include <stdlib.h> | |
/* Defining MPU_WRAPPERS_INCLUDED_FROM_API_FILE prevents task.h from redefining | |
all the API functions to use the MPU wrappers. That should only be done when | |
task.h is included from an application file. */ | |
#define MPU_WRAPPERS_INCLUDED_FROM_API_FILE | |
#include "FreeRTOS.h" | |
#include "task.h" | |
#undef MPU_WRAPPERS_INCLUDED_FROM_API_FILE | |
/* A few bytes might be lost to byte aligning the heap start address. */ | |
#define configADJUSTED_HEAP_SIZE ( configTOTAL_HEAP_SIZE - portBYTE_ALIGNMENT ) | |
/* Allocate the memory for the heap. */ | |
static uint8_t ucHeap[ configTOTAL_HEAP_SIZE ]; | |
static size_t xNextFreeByte = ( size_t ) 0; | |
/*-----------------------------------------------------------*/ | |
void *pvPortMalloc( size_t xWantedSize ) | |
{ | |
void *pvReturn = NULL; | |
static uint8_t *pucAlignedHeap = NULL; | |
/* Ensure that blocks are always aligned to the required number of bytes. */ | |
#if portBYTE_ALIGNMENT != 1 | |
if( xWantedSize & portBYTE_ALIGNMENT_MASK ) | |
{ | |
/* Byte alignment required. */ | |
xWantedSize += ( portBYTE_ALIGNMENT - ( xWantedSize & portBYTE_ALIGNMENT_MASK ) ); | |
} | |
#endif | |
vTaskSuspendAll(); | |
{ | |
if( pucAlignedHeap == NULL ) | |
{ | |
/* Ensure the heap starts on a correctly aligned boundary. */ | |
pucAlignedHeap = ( uint8_t * ) ( ( ( portPOINTER_SIZE_TYPE ) &ucHeap[ portBYTE_ALIGNMENT ] ) & ( ( portPOINTER_SIZE_TYPE ) ~portBYTE_ALIGNMENT_MASK ) ); | |
} | |
/* Check there is enough room left for the allocation. */ | |
if( ( ( xNextFreeByte + xWantedSize ) < configADJUSTED_HEAP_SIZE ) && | |
( ( xNextFreeByte + xWantedSize ) > xNextFreeByte ) )/* Check for overflow. */ | |
{ | |
/* Return the next free byte then increment the index past this | |
block. */ | |
pvReturn = pucAlignedHeap + xNextFreeByte; | |
xNextFreeByte += xWantedSize; | |
} | |
traceMALLOC( pvReturn, xWantedSize ); | |
} | |
xTaskResumeAll(); | |
#if( configUSE_MALLOC_FAILED_HOOK == 1 ) | |
{ | |
if( pvReturn == NULL ) | |
{ | |
extern void vApplicationMallocFailedHook( void ); | |
vApplicationMallocFailedHook(); | |
} | |
} | |
#endif | |
return pvReturn; | |
} | |
/*-----------------------------------------------------------*/ | |
void vPortFree( void *pv ) | |
{ | |
/* Memory cannot be freed using this scheme. See heap_2.c, heap_3.c and | |
heap_4.c for alternative implementations, and the memory management pages of | |
http://www.FreeRTOS.org for more information. */ | |
( void ) pv; | |
/* Force an assert as it is invalid to call this function. */ | |
configASSERT( pv == NULL ); | |
} | |
/*-----------------------------------------------------------*/ | |
void vPortInitialiseBlocks( void ) | |
{ | |
/* Only required when static memory is not cleared. */ | |
xNextFreeByte = ( size_t ) 0; | |
} | |
/*-----------------------------------------------------------*/ | |
size_t xPortGetFreeHeapSize( void ) | |
{ | |
return ( configADJUSTED_HEAP_SIZE - xNextFreeByte ); | |
} | |