/*\r
- FreeRTOS V7.6.0 - Copyright (C) 2013 Real Time Engineers Ltd.\r
- All rights reserved\r
-\r
- VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.\r
-\r
- ***************************************************************************\r
- * *\r
- * FreeRTOS provides completely free yet professionally developed, *\r
- * robust, strictly quality controlled, supported, and cross *\r
- * platform software that has become a de facto standard. *\r
- * *\r
- * Help yourself get started quickly and support the FreeRTOS *\r
- * project by purchasing a FreeRTOS tutorial book, reference *\r
- * manual, or both from: http://www.FreeRTOS.org/Documentation *\r
- * *\r
- * Thank you! *\r
- * *\r
- ***************************************************************************\r
-\r
- This file is part of the FreeRTOS distribution.\r
-\r
- FreeRTOS is free software; you can redistribute it and/or modify it under\r
- the terms of the GNU General Public License (version 2) as published by the\r
- Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.\r
-\r
- >>! NOTE: The modification to the GPL is included to allow you to distribute\r
- >>! a combined work that includes FreeRTOS without being obliged to provide\r
- >>! the source code for proprietary components outside of the FreeRTOS\r
- >>! kernel.\r
-\r
- FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY\r
- WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS\r
- FOR A PARTICULAR PURPOSE. Full license text is available from the following\r
- link: http://www.freertos.org/a00114.html\r
-\r
- 1 tab == 4 spaces!\r
-\r
- ***************************************************************************\r
- * *\r
- * Having a problem? Start by reading the FAQ "My application does *\r
- * not run, what could be wrong?" *\r
- * *\r
- * http://www.FreeRTOS.org/FAQHelp.html *\r
- * *\r
- ***************************************************************************\r
-\r
- http://www.FreeRTOS.org - Documentation, books, training, latest versions,\r
- license and Real Time Engineers Ltd. contact details.\r
-\r
- http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,\r
- including FreeRTOS+Trace - an indispensable productivity tool, a DOS\r
- compatible FAT file system, and our tiny thread aware UDP/IP stack.\r
-\r
- http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High\r
- Integrity Systems to sell under the OpenRTOS brand. Low cost OpenRTOS\r
- licenses offer ticketed support, indemnification and middleware.\r
-\r
- http://www.SafeRTOS.com - High Integrity Systems also provide a safety\r
- engineered and independently SIL3 certified version for use in safety and\r
- mission critical applications that require provable dependability.\r
-\r
- 1 tab == 4 spaces!\r
-*/\r
+ * FreeRTOS Kernel V10.3.0\r
+ * Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.\r
+ *\r
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of\r
+ * this software and associated documentation files (the "Software"), to deal in\r
+ * the Software without restriction, including without limitation the rights to\r
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of\r
+ * the Software, and to permit persons to whom the Software is furnished to do so,\r
+ * subject to the following conditions:\r
+ *\r
+ * The above copyright notice and this permission notice shall be included in all\r
+ * copies or substantial portions of the Software.\r
+ *\r
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\r
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS\r
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR\r
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER\r
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN\r
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\r
+ *\r
+ * http://www.FreeRTOS.org\r
+ * http://aws.amazon.com/freertos\r
+ *\r
+ * 1 tab == 4 spaces!\r
+ */\r
\r
/*\r
* A sample implementation of pvPortMalloc() and vPortFree() that combines\r
\r
#undef MPU_WRAPPERS_INCLUDED_FROM_API_FILE\r
\r
+#if( configSUPPORT_DYNAMIC_ALLOCATION == 0 )\r
+ #error This file must not be used if configSUPPORT_DYNAMIC_ALLOCATION is 0\r
+#endif\r
+\r
/* Block sizes must not get too small. */\r
-#define heapMINIMUM_BLOCK_SIZE ( ( size_t ) ( heapSTRUCT_SIZE * 2 ) )\r
+#define heapMINIMUM_BLOCK_SIZE ( ( size_t ) ( xHeapStructSize << 1 ) )\r
\r
/* Assumes 8bit bytes! */\r
#define heapBITS_PER_BYTE ( ( size_t ) 8 )\r
\r
-/* A few bytes might be lost to byte aligning the heap start address. */\r
-#define heapADJUSTED_HEAP_SIZE ( configTOTAL_HEAP_SIZE - portBYTE_ALIGNMENT )\r
-\r
/* Allocate the memory for the heap. */\r
-static unsigned char ucHeap[ configTOTAL_HEAP_SIZE ];\r
+#if( configAPPLICATION_ALLOCATED_HEAP == 1 )\r
+ /* The application writer has already defined the array used for the RTOS\r
+ heap - probably so it can be placed in a special segment or address. */\r
+ extern uint8_t ucHeap[ configTOTAL_HEAP_SIZE ];\r
+#else\r
+ static uint8_t ucHeap[ configTOTAL_HEAP_SIZE ];\r
+#endif /* configAPPLICATION_ALLOCATED_HEAP */\r
\r
/* Define the linked list structure. This is used to link free blocks in order\r
of their memory address. */\r
{\r
struct A_BLOCK_LINK *pxNextFreeBlock; /*<< The next free block in the list. */\r
size_t xBlockSize; /*<< The size of the free block. */\r
-} xBlockLink;\r
+} BlockLink_t;\r
\r
/*-----------------------------------------------------------*/\r
\r
* the block in front it and/or the block behind it if the memory blocks are\r
* adjacent to each other.\r
*/\r
-static void prvInsertBlockIntoFreeList( xBlockLink *pxBlockToInsert );\r
+static void prvInsertBlockIntoFreeList( BlockLink_t *pxBlockToInsert );\r
\r
/*\r
* Called automatically to setup the required heap structures the first time\r
\r
/* The size of the structure placed at the beginning of each allocated memory\r
block must by correctly byte aligned. */\r
-static const unsigned short heapSTRUCT_SIZE = ( ( sizeof ( xBlockLink ) + ( portBYTE_ALIGNMENT - 1 ) ) & ~portBYTE_ALIGNMENT_MASK );\r
-\r
-/* Ensure the pxEnd pointer will end up on the correct byte alignment. */\r
-static const size_t xTotalHeapSize = ( ( size_t ) heapADJUSTED_HEAP_SIZE ) & ( ( size_t ) ~portBYTE_ALIGNMENT_MASK );\r
+static const size_t xHeapStructSize = ( sizeof( BlockLink_t ) + ( ( size_t ) ( portBYTE_ALIGNMENT - 1 ) ) ) & ~( ( size_t ) portBYTE_ALIGNMENT_MASK );\r
\r
/* Create a couple of list links to mark the start and end of the list. */\r
-static xBlockLink xStart, *pxEnd = NULL;\r
+static BlockLink_t xStart, *pxEnd = NULL;\r
\r
-/* Keeps track of the number of free bytes remaining, but says nothing about\r
-fragmentation. */\r
-static size_t xFreeBytesRemaining = ( ( size_t ) heapADJUSTED_HEAP_SIZE ) & ( ( size_t ) ~portBYTE_ALIGNMENT_MASK );\r
-static size_t xMinimumEverFreeBytesRemaining = ( ( size_t ) heapADJUSTED_HEAP_SIZE ) & ( ( size_t ) ~portBYTE_ALIGNMENT_MASK );\r
+/* Keeps track of the number of calls to allocate and free memory as well as the\r
+number of free bytes remaining, but says nothing about fragmentation. */\r
+static size_t xFreeBytesRemaining = 0U;\r
+static size_t xMinimumEverFreeBytesRemaining = 0U;\r
+static size_t xNumberOfSuccessfulAllocations = 0;\r
+static size_t xNumberOfSuccessfulFrees = 0;\r
\r
/* Gets set to the top bit of an size_t type. When this bit in the xBlockSize\r
-member of an xBlockLink structure is set then the block belongs to the\r
+member of an BlockLink_t structure is set then the block belongs to the\r
application. When the bit is free the block is still part of the free heap\r
space. */\r
static size_t xBlockAllocatedBit = 0;\r
\r
void *pvPortMalloc( size_t xWantedSize )\r
{\r
-xBlockLink *pxBlock, *pxPreviousBlock, *pxNewBlockLink;\r
+BlockLink_t *pxBlock, *pxPreviousBlock, *pxNewBlockLink;\r
void *pvReturn = NULL;\r
\r
vTaskSuspendAll();\r
}\r
\r
/* Check the requested block size is not so large that the top bit is\r
- set. The top bit of the block size member of the xBlockLink structure\r
+ set. The top bit of the block size member of the BlockLink_t structure\r
is used to determine who owns the block - the application or the\r
kernel, so it must be free. */\r
if( ( xWantedSize & xBlockAllocatedBit ) == 0 )\r
{\r
- /* The wanted size is increased so it can contain a xBlockLink\r
+ /* The wanted size is increased so it can contain a BlockLink_t\r
structure in addition to the requested amount of bytes. */\r
if( xWantedSize > 0 )\r
{\r
- xWantedSize += heapSTRUCT_SIZE;\r
+ xWantedSize += xHeapStructSize;\r
\r
/* Ensure that blocks are always aligned to the required number\r
of bytes. */\r
{\r
/* Byte alignment required. */\r
xWantedSize += ( portBYTE_ALIGNMENT - ( xWantedSize & portBYTE_ALIGNMENT_MASK ) );\r
+ configASSERT( ( xWantedSize & portBYTE_ALIGNMENT_MASK ) == 0 );\r
}\r
else\r
{\r
if( pxBlock != pxEnd )\r
{\r
/* Return the memory space pointed to - jumping over the\r
- xBlockLink structure at its start. */\r
- pvReturn = ( void * ) ( ( ( unsigned char * ) pxPreviousBlock->pxNextFreeBlock ) + heapSTRUCT_SIZE );\r
+ BlockLink_t structure at its start. */\r
+ pvReturn = ( void * ) ( ( ( uint8_t * ) pxPreviousBlock->pxNextFreeBlock ) + xHeapStructSize );\r
\r
/* This block is being returned for use so must be taken out\r
of the list of free blocks. */\r
block following the number of bytes requested. The void\r
cast is used to prevent byte alignment warnings from the\r
compiler. */\r
- pxNewBlockLink = ( void * ) ( ( ( unsigned char * ) pxBlock ) + xWantedSize );\r
+ pxNewBlockLink = ( void * ) ( ( ( uint8_t * ) pxBlock ) + xWantedSize );\r
+ configASSERT( ( ( ( size_t ) pxNewBlockLink ) & portBYTE_ALIGNMENT_MASK ) == 0 );\r
\r
/* Calculate the sizes of two blocks split from the\r
single block. */\r
pxBlock->xBlockSize = xWantedSize;\r
\r
/* Insert the new block into the list of free blocks. */\r
- prvInsertBlockIntoFreeList( ( pxNewBlockLink ) );\r
+ prvInsertBlockIntoFreeList( pxNewBlockLink );\r
}\r
else\r
{\r
by the application and has no "next" block. */\r
pxBlock->xBlockSize |= xBlockAllocatedBit;\r
pxBlock->pxNextFreeBlock = NULL;\r
+ xNumberOfSuccessfulAllocations++;\r
}\r
else\r
{\r
\r
traceMALLOC( pvReturn, xWantedSize );\r
}\r
- xTaskResumeAll();\r
+ ( void ) xTaskResumeAll();\r
\r
#if( configUSE_MALLOC_FAILED_HOOK == 1 )\r
{\r
}\r
#endif\r
\r
+ configASSERT( ( ( ( size_t ) pvReturn ) & ( size_t ) portBYTE_ALIGNMENT_MASK ) == 0 );\r
return pvReturn;\r
}\r
/*-----------------------------------------------------------*/\r
\r
void vPortFree( void *pv )\r
{\r
-unsigned char *puc = ( unsigned char * ) pv;\r
-xBlockLink *pxLink;\r
+uint8_t *puc = ( uint8_t * ) pv;\r
+BlockLink_t *pxLink;\r
\r
if( pv != NULL )\r
{\r
- /* The memory being freed will have an xBlockLink structure immediately\r
+ /* The memory being freed will have an BlockLink_t structure immediately\r
before it. */\r
- puc -= heapSTRUCT_SIZE;\r
+ puc -= xHeapStructSize;\r
\r
/* This casting is to keep the compiler from issuing warnings. */\r
pxLink = ( void * ) puc;\r
{\r
/* Add this block to the list of free blocks. */\r
xFreeBytesRemaining += pxLink->xBlockSize;\r
- prvInsertBlockIntoFreeList( ( ( xBlockLink * ) pxLink ) );\r
traceFREE( pv, pxLink->xBlockSize );\r
+ prvInsertBlockIntoFreeList( ( ( BlockLink_t * ) pxLink ) );\r
+ xNumberOfSuccessfulFrees++;\r
}\r
- xTaskResumeAll();\r
+ ( void ) xTaskResumeAll();\r
}\r
else\r
{\r
\r
static void prvHeapInit( void )\r
{\r
-xBlockLink *pxFirstFreeBlock;\r
-unsigned char *pucHeapEnd, *pucAlignedHeap;\r
+BlockLink_t *pxFirstFreeBlock;\r
+uint8_t *pucAlignedHeap;\r
+size_t uxAddress;\r
+size_t xTotalHeapSize = configTOTAL_HEAP_SIZE;\r
\r
/* Ensure the heap starts on a correctly aligned boundary. */\r
- pucAlignedHeap = ( unsigned char * ) ( ( ( portPOINTER_SIZE_TYPE ) &ucHeap[ portBYTE_ALIGNMENT ] ) & ( ( portPOINTER_SIZE_TYPE ) ~portBYTE_ALIGNMENT_MASK ) );\r
+ uxAddress = ( size_t ) ucHeap;\r
+\r
+ if( ( uxAddress & portBYTE_ALIGNMENT_MASK ) != 0 )\r
+ {\r
+ uxAddress += ( portBYTE_ALIGNMENT - 1 );\r
+ uxAddress &= ~( ( size_t ) portBYTE_ALIGNMENT_MASK );\r
+ xTotalHeapSize -= uxAddress - ( size_t ) ucHeap;\r
+ }\r
+\r
+ pucAlignedHeap = ( uint8_t * ) uxAddress;\r
\r
/* xStart is used to hold a pointer to the first item in the list of free\r
blocks. The void cast is used to prevent compiler warnings. */\r
\r
/* pxEnd is used to mark the end of the list of free blocks and is inserted\r
at the end of the heap space. */\r
- pucHeapEnd = pucAlignedHeap + xTotalHeapSize;\r
- pucHeapEnd -= heapSTRUCT_SIZE;\r
- pxEnd = ( void * ) pucHeapEnd;\r
- configASSERT( ( ( ( unsigned long ) pxEnd ) & ( ( unsigned long ) portBYTE_ALIGNMENT_MASK ) ) == 0UL );\r
+ uxAddress = ( ( size_t ) pucAlignedHeap ) + xTotalHeapSize;\r
+ uxAddress -= xHeapStructSize;\r
+ uxAddress &= ~( ( size_t ) portBYTE_ALIGNMENT_MASK );\r
+ pxEnd = ( void * ) uxAddress;\r
pxEnd->xBlockSize = 0;\r
pxEnd->pxNextFreeBlock = NULL;\r
\r
/* To start with there is a single free block that is sized to take up the\r
entire heap space, minus the space taken by pxEnd. */\r
pxFirstFreeBlock = ( void * ) pucAlignedHeap;\r
- pxFirstFreeBlock->xBlockSize = xTotalHeapSize - heapSTRUCT_SIZE;\r
+ pxFirstFreeBlock->xBlockSize = uxAddress - ( size_t ) pxFirstFreeBlock;\r
pxFirstFreeBlock->pxNextFreeBlock = pxEnd;\r
\r
- /* The heap now contains pxEnd. */\r
- xFreeBytesRemaining -= heapSTRUCT_SIZE;\r
+ /* Only one block exists - and it covers the entire usable heap space. */\r
+ xMinimumEverFreeBytesRemaining = pxFirstFreeBlock->xBlockSize;\r
+ xFreeBytesRemaining = pxFirstFreeBlock->xBlockSize;\r
\r
/* Work out the position of the top bit in a size_t variable. */\r
xBlockAllocatedBit = ( ( size_t ) 1 ) << ( ( sizeof( size_t ) * heapBITS_PER_BYTE ) - 1 );\r
}\r
/*-----------------------------------------------------------*/\r
\r
-static void prvInsertBlockIntoFreeList( xBlockLink *pxBlockToInsert )\r
+static void prvInsertBlockIntoFreeList( BlockLink_t *pxBlockToInsert )\r
{\r
-xBlockLink *pxIterator;\r
-unsigned char *puc;\r
+BlockLink_t *pxIterator;\r
+uint8_t *puc;\r
\r
/* Iterate through the list until a block is found that has a higher address\r
than the block being inserted. */\r
\r
/* Do the block being inserted, and the block it is being inserted after\r
make a contiguous block of memory? */\r
- puc = ( unsigned char * ) pxIterator;\r
- if( ( puc + pxIterator->xBlockSize ) == ( unsigned char * ) pxBlockToInsert )\r
+ puc = ( uint8_t * ) pxIterator;\r
+ if( ( puc + pxIterator->xBlockSize ) == ( uint8_t * ) pxBlockToInsert )\r
{\r
pxIterator->xBlockSize += pxBlockToInsert->xBlockSize;\r
pxBlockToInsert = pxIterator;\r
\r
/* Do the block being inserted, and the block it is being inserted before\r
make a contiguous block of memory? */\r
- puc = ( unsigned char * ) pxBlockToInsert;\r
- if( ( puc + pxBlockToInsert->xBlockSize ) == ( unsigned char * ) pxIterator->pxNextFreeBlock )\r
+ puc = ( uint8_t * ) pxBlockToInsert;\r
+ if( ( puc + pxBlockToInsert->xBlockSize ) == ( uint8_t * ) pxIterator->pxNextFreeBlock )\r
{\r
if( pxIterator->pxNextFreeBlock != pxEnd )\r
{\r
mtCOVERAGE_TEST_MARKER();\r
}\r
}\r
+/*-----------------------------------------------------------*/\r
+\r
+void vPortGetHeapStats( HeapStats_t *pxHeapStats )\r
+{\r
+BlockLink_t *pxBlock;\r
+size_t xBlocks = 0, xMaxSize = 0, xMinSize = portMAX_DELAY; /* portMAX_DELAY used as a portable way of getting the maximum value. */\r
+\r
+ vTaskSuspendAll();\r
+ {\r
+ pxBlock = xStart.pxNextFreeBlock;\r
+\r
+ /* pxBlock will be NULL if the heap has not been initialised. The heap\r
+ is initialised automatically when the first allocation is made. */\r
+ if( pxBlock != NULL )\r
+ {\r
+ do\r
+ {\r
+ /* Increment the number of blocks and record the largest block seen\r
+ so far. */\r
+ xBlocks++;\r
+\r
+ if( pxBlock->xBlockSize > xMaxSize )\r
+ {\r
+ xMaxSize = pxBlock->xBlockSize;\r
+ }\r
+\r
+ if( pxBlock->xBlockSize < xMinSize )\r
+ {\r
+ xMinSize = pxBlock->xBlockSize;\r
+ }\r
+\r
+ /* Move to the next block in the chain until the last block is\r
+ reached. */\r
+ pxBlock = pxBlock->pxNextFreeBlock;\r
+ } while( pxBlock != pxEnd );\r
+ }\r
+ }\r
+ xTaskResumeAll();\r
+\r
+ pxHeapStats->xSizeOfLargestFreeBlockInBytes = xMaxSize;\r
+ pxHeapStats->xSizeOfSmallestFreeBlockInBytes = xMinSize;\r
+ pxHeapStats->xNumberOfFreeBlocks = xBlocks;\r
+\r
+ taskENTER_CRITICAL();\r
+ {\r
+ pxHeapStats->xAvailableHeapSpaceInBytes = xFreeBytesRemaining;\r
+ pxHeapStats->xNumberOfSuccessfulAllocations = xNumberOfSuccessfulAllocations;\r
+ pxHeapStats->xNumberOfSuccessfulFrees = xNumberOfSuccessfulFrees;\r
+ pxHeapStats->xMinimumEverFreeBytesRemaining = xMinimumEverFreeBytesRemaining;\r
+ }\r
+ taskEXIT_CRITICAL();\r
+}\r
\r
projects / freertos / blobdiff