188 lines
7.4 KiB
C
188 lines
7.4 KiB
C
/*
|
|
FreeRTOS V9.0.0 - Copyright (C) 2016 Real Time Engineers Ltd.
|
|
All rights reserved
|
|
|
|
VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
|
|
|
|
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 on the following
|
|
link: http://www.freertos.org/a00114.html
|
|
|
|
***************************************************************************
|
|
* *
|
|
* FreeRTOS provides completely free yet professionally developed, *
|
|
* robust, strictly quality controlled, supported, and cross *
|
|
* platform software that is more than just the market leader, it *
|
|
* is the industry's de facto standard. *
|
|
* *
|
|
* Help yourself get started quickly while simultaneously helping *
|
|
* to support the FreeRTOS project by purchasing a FreeRTOS *
|
|
* tutorial book, reference manual, or both: *
|
|
* http://www.FreeRTOS.org/Documentation *
|
|
* *
|
|
***************************************************************************
|
|
|
|
http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading
|
|
the FAQ page "My application does not run, what could be wrong?". Have you
|
|
defined configASSERT()?
|
|
|
|
http://www.FreeRTOS.org/support - In return for receiving this top quality
|
|
embedded software for free we request you assist our global community by
|
|
participating in the support forum.
|
|
|
|
http://www.FreeRTOS.org/training - Investing in training allows your team to
|
|
be as productive as possible as early as possible. Now you can receive
|
|
FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
|
|
Ltd, and the world's leading authority on the world's leading RTOS.
|
|
|
|
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.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
|
|
Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
|
|
|
|
http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
|
|
Integrity Systems ltd. to sell under the OpenRTOS brand. Low cost OpenRTOS
|
|
licenses offer ticketed support, indemnification and commercial 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
|
|
|
|
#if( configSUPPORT_DYNAMIC_ALLOCATION == 0 )
|
|
#error This file must not be used if configSUPPORT_DYNAMIC_ALLOCATION is 0
|
|
#endif
|
|
|
|
/* 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. */
|
|
/* Allocate the memory for the heap. */
|
|
#if( configAPPLICATION_ALLOCATED_HEAP == 1 )
|
|
/* The application writer has already defined the array used for the RTOS
|
|
heap - probably so it can be placed in a special segment or address. */
|
|
extern uint8_t ucHeap[ configTOTAL_HEAP_SIZE ];
|
|
#else
|
|
static uint8_t ucHeap[ configTOTAL_HEAP_SIZE ];
|
|
#endif /* configAPPLICATION_ALLOCATED_HEAP */
|
|
|
|
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 );
|
|
}
|
|
( void ) 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 );
|
|
}
|
|
|
|
|
|
|