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authorDominik Sliwa <dominik.sliwa@toradex.com>2018-10-30 16:31:29 +0100
committerDominik Sliwa <dominik.sliwa@toradex.com>2018-10-31 11:54:38 +0100
commit56e86c626df3dbf74c1021210636a7c5d92a49ce (patch)
tree54ba9581ad14d838d8926e4e6d673befad1f932c /freertos/Source/portable/MemMang/heap_2.c
parent4dfc5493fec8f6290457446b0478695b153da60a (diff)
Signed-off-by: Dominik Sliwa <dominik.sliwa@toradex.com>
Diffstat (limited to 'freertos/Source/portable/MemMang/heap_2.c')
-rw-r--r--freertos/Source/portable/MemMang/heap_2.c314
1 files changed, 0 insertions, 314 deletions
diff --git a/freertos/Source/portable/MemMang/heap_2.c b/freertos/Source/portable/MemMang/heap_2.c
deleted file mode 100644
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--- a/freertos/Source/portable/MemMang/heap_2.c
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-/*
- 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!
-*/
-
-/*
- * A sample implementation of pvPortMalloc() and vPortFree() that permits
- * allocated blocks to be freed, but does not combine adjacent free blocks
- * into a single larger block (and so will fragment memory). See heap_4.c for
- * an equivalent that does combine adjacent blocks into single larger blocks.
- *
- * See heap_1.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 )
-
-/*
- * Initialises the heap structures before their first use.
- */
-static void prvHeapInit( void );
-
-/* 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 */
-
-
-/* Define the linked list structure. This is used to link free blocks in order
-of their size. */
-typedef struct A_BLOCK_LINK
-{
- struct A_BLOCK_LINK *pxNextFreeBlock; /*<< The next free block in the list. */
- size_t xBlockSize; /*<< The size of the free block. */
-} BlockLink_t;
-
-
-static const uint16_t heapSTRUCT_SIZE = ( ( sizeof ( BlockLink_t ) + ( portBYTE_ALIGNMENT - 1 ) ) & ~portBYTE_ALIGNMENT_MASK );
-#define heapMINIMUM_BLOCK_SIZE ( ( size_t ) ( heapSTRUCT_SIZE * 2 ) )
-
-/* Create a couple of list links to mark the start and end of the list. */
-static BlockLink_t xStart, xEnd;
-
-/* Keeps track of the number of free bytes remaining, but says nothing about
-fragmentation. */
-static size_t xFreeBytesRemaining = configADJUSTED_HEAP_SIZE;
-
-/* STATIC FUNCTIONS ARE DEFINED AS MACROS TO MINIMIZE THE FUNCTION CALL DEPTH. */
-
-/*
- * Insert a block into the list of free blocks - which is ordered by size of
- * the block. Small blocks at the start of the list and large blocks at the end
- * of the list.
- */
-#define prvInsertBlockIntoFreeList( pxBlockToInsert ) \
-{ \
-BlockLink_t *pxIterator; \
-size_t xBlockSize; \
- \
- xBlockSize = pxBlockToInsert->xBlockSize; \
- \
- /* Iterate through the list until a block is found that has a larger size */ \
- /* than the block we are inserting. */ \
- for( pxIterator = &xStart; pxIterator->pxNextFreeBlock->xBlockSize < xBlockSize; pxIterator = pxIterator->pxNextFreeBlock ) \
- { \
- /* There is nothing to do here - just iterate to the correct position. */ \
- } \
- \
- /* Update the list to include the block being inserted in the correct */ \
- /* position. */ \
- pxBlockToInsert->pxNextFreeBlock = pxIterator->pxNextFreeBlock; \
- pxIterator->pxNextFreeBlock = pxBlockToInsert; \
-}
-/*-----------------------------------------------------------*/
-
-void *pvPortMalloc( size_t xWantedSize )
-{
-BlockLink_t *pxBlock, *pxPreviousBlock, *pxNewBlockLink;
-static BaseType_t xHeapHasBeenInitialised = pdFALSE;
-void *pvReturn = NULL;
-
- vTaskSuspendAll();
- {
- /* If this is the first call to malloc then the heap will require
- initialisation to setup the list of free blocks. */
- if( xHeapHasBeenInitialised == pdFALSE )
- {
- prvHeapInit();
- xHeapHasBeenInitialised = pdTRUE;
- }
-
- /* The wanted size is increased so it can contain a BlockLink_t
- structure in addition to the requested amount of bytes. */
- if( xWantedSize > 0 )
- {
- xWantedSize += heapSTRUCT_SIZE;
-
- /* Ensure that blocks are always aligned to the required number of bytes. */
- if( ( xWantedSize & portBYTE_ALIGNMENT_MASK ) != 0 )
- {
- /* Byte alignment required. */
- xWantedSize += ( portBYTE_ALIGNMENT - ( xWantedSize & portBYTE_ALIGNMENT_MASK ) );
- }
- }
-
- if( ( xWantedSize > 0 ) && ( xWantedSize < configADJUSTED_HEAP_SIZE ) )
- {
- /* Blocks are stored in byte order - traverse the list from the start
- (smallest) block until one of adequate size is found. */
- pxPreviousBlock = &xStart;
- pxBlock = xStart.pxNextFreeBlock;
- while( ( pxBlock->xBlockSize < xWantedSize ) && ( pxBlock->pxNextFreeBlock != NULL ) )
- {
- pxPreviousBlock = pxBlock;
- pxBlock = pxBlock->pxNextFreeBlock;
- }
-
- /* If we found the end marker then a block of adequate size was not found. */
- if( pxBlock != &xEnd )
- {
- /* Return the memory space - jumping over the BlockLink_t structure
- at its start. */
- pvReturn = ( void * ) ( ( ( uint8_t * ) pxPreviousBlock->pxNextFreeBlock ) + heapSTRUCT_SIZE );
-
- /* This block is being returned for use so must be taken out of the
- list of free blocks. */
- pxPreviousBlock->pxNextFreeBlock = pxBlock->pxNextFreeBlock;
-
- /* If the block is larger than required it can be split into two. */
- if( ( pxBlock->xBlockSize - xWantedSize ) > heapMINIMUM_BLOCK_SIZE )
- {
- /* This block is to be split into two. Create a new block
- following the number of bytes requested. The void cast is
- used to prevent byte alignment warnings from the compiler. */
- pxNewBlockLink = ( void * ) ( ( ( uint8_t * ) pxBlock ) + xWantedSize );
-
- /* Calculate the sizes of two blocks split from the single
- block. */
- pxNewBlockLink->xBlockSize = pxBlock->xBlockSize - xWantedSize;
- pxBlock->xBlockSize = xWantedSize;
-
- /* Insert the new block into the list of free blocks. */
- prvInsertBlockIntoFreeList( ( pxNewBlockLink ) );
- }
-
- xFreeBytesRemaining -= pxBlock->xBlockSize;
- }
- }
-
- 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 )
-{
-uint8_t *puc = ( uint8_t * ) pv;
-BlockLink_t *pxLink;
-
- if( pv != NULL )
- {
- /* The memory being freed will have an BlockLink_t structure immediately
- before it. */
- puc -= heapSTRUCT_SIZE;
-
- /* This unexpected casting is to keep some compilers from issuing
- byte alignment warnings. */
- pxLink = ( void * ) puc;
-
- vTaskSuspendAll();
- {
- /* Add this block to the list of free blocks. */
- prvInsertBlockIntoFreeList( ( ( BlockLink_t * ) pxLink ) );
- xFreeBytesRemaining += pxLink->xBlockSize;
- traceFREE( pv, pxLink->xBlockSize );
- }
- ( void ) xTaskResumeAll();
- }
-}
-/*-----------------------------------------------------------*/
-
-size_t xPortGetFreeHeapSize( void )
-{
- return xFreeBytesRemaining;
-}
-/*-----------------------------------------------------------*/
-
-void vPortInitialiseBlocks( void )
-{
- /* This just exists to keep the linker quiet. */
-}
-/*-----------------------------------------------------------*/
-
-static void prvHeapInit( void )
-{
-BlockLink_t *pxFirstFreeBlock;
-uint8_t *pucAlignedHeap;
-
- /* Ensure the heap starts on a correctly aligned boundary. */
- pucAlignedHeap = ( uint8_t * ) ( ( ( portPOINTER_SIZE_TYPE ) &ucHeap[ portBYTE_ALIGNMENT ] ) & ( ~( ( portPOINTER_SIZE_TYPE ) portBYTE_ALIGNMENT_MASK ) ) );
-
- /* xStart is used to hold a pointer to the first item in the list of free
- blocks. The void cast is used to prevent compiler warnings. */
- xStart.pxNextFreeBlock = ( void * ) pucAlignedHeap;
- xStart.xBlockSize = ( size_t ) 0;
-
- /* xEnd is used to mark the end of the list of free blocks. */
- xEnd.xBlockSize = configADJUSTED_HEAP_SIZE;
- xEnd.pxNextFreeBlock = NULL;
-
- /* To start with there is a single free block that is sized to take up the
- entire heap space. */
- pxFirstFreeBlock = ( void * ) pucAlignedHeap;
- pxFirstFreeBlock->xBlockSize = configADJUSTED_HEAP_SIZE;
- pxFirstFreeBlock->pxNextFreeBlock = &xEnd;
-}
-/*-----------------------------------------------------------*/