mirror of
https://github.com/cesanta/mongoose.git
synced 2024-12-12 15:39:00 +08:00
211 lines
9.5 KiB
C
211 lines
9.5 KiB
C
/*
|
|
* FreeRTOS Kernel V10.4.3
|
|
* Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy of
|
|
* this software and associated documentation files (the "Software"), to deal in
|
|
* the Software without restriction, including without limitation the rights to
|
|
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
|
|
* the Software, and to permit persons to whom the Software is furnished to do so,
|
|
* subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in all
|
|
* copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
|
|
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
|
|
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
|
|
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*
|
|
* https://www.FreeRTOS.org
|
|
* https://github.com/FreeRTOS
|
|
*
|
|
*/
|
|
|
|
|
|
#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 "list.h"
|
|
|
|
/* Lint e9021, e961 and e750 are suppressed as a MISRA exception justified
|
|
* because the MPU ports require MPU_WRAPPERS_INCLUDED_FROM_API_FILE to be
|
|
* defined for the header files above, but not in this file, in order to
|
|
* generate the correct privileged Vs unprivileged linkage and placement. */
|
|
#undef MPU_WRAPPERS_INCLUDED_FROM_API_FILE /*lint !e961 !e750 !e9021. */
|
|
|
|
/*-----------------------------------------------------------
|
|
* PUBLIC LIST API documented in list.h
|
|
*----------------------------------------------------------*/
|
|
|
|
void vListInitialise( List_t * const pxList )
|
|
{
|
|
/* The list structure contains a list item which is used to mark the
|
|
* end of the list. To initialise the list the list end is inserted
|
|
* as the only list entry. */
|
|
pxList->pxIndex = ( ListItem_t * ) &( pxList->xListEnd ); /*lint !e826 !e740 !e9087 The mini list structure is used as the list end to save RAM. This is checked and valid. */
|
|
|
|
/* The list end value is the highest possible value in the list to
|
|
* ensure it remains at the end of the list. */
|
|
pxList->xListEnd.xItemValue = portMAX_DELAY;
|
|
|
|
/* The list end next and previous pointers point to itself so we know
|
|
* when the list is empty. */
|
|
pxList->xListEnd.pxNext = ( ListItem_t * ) &( pxList->xListEnd ); /*lint !e826 !e740 !e9087 The mini list structure is used as the list end to save RAM. This is checked and valid. */
|
|
pxList->xListEnd.pxPrevious = ( ListItem_t * ) &( pxList->xListEnd ); /*lint !e826 !e740 !e9087 The mini list structure is used as the list end to save RAM. This is checked and valid. */
|
|
|
|
pxList->uxNumberOfItems = ( UBaseType_t ) 0U;
|
|
|
|
/* Write known values into the list if
|
|
* configUSE_LIST_DATA_INTEGRITY_CHECK_BYTES is set to 1. */
|
|
listSET_LIST_INTEGRITY_CHECK_1_VALUE( pxList );
|
|
listSET_LIST_INTEGRITY_CHECK_2_VALUE( pxList );
|
|
}
|
|
/*-----------------------------------------------------------*/
|
|
|
|
void vListInitialiseItem( ListItem_t * const pxItem )
|
|
{
|
|
/* Make sure the list item is not recorded as being on a list. */
|
|
pxItem->pxContainer = NULL;
|
|
|
|
/* Write known values into the list item if
|
|
* configUSE_LIST_DATA_INTEGRITY_CHECK_BYTES is set to 1. */
|
|
listSET_FIRST_LIST_ITEM_INTEGRITY_CHECK_VALUE( pxItem );
|
|
listSET_SECOND_LIST_ITEM_INTEGRITY_CHECK_VALUE( pxItem );
|
|
}
|
|
/*-----------------------------------------------------------*/
|
|
|
|
void vListInsertEnd( List_t * const pxList,
|
|
ListItem_t * const pxNewListItem )
|
|
{
|
|
ListItem_t * const pxIndex = pxList->pxIndex;
|
|
|
|
/* Only effective when configASSERT() is also defined, these tests may catch
|
|
* the list data structures being overwritten in memory. They will not catch
|
|
* data errors caused by incorrect configuration or use of FreeRTOS. */
|
|
listTEST_LIST_INTEGRITY( pxList );
|
|
listTEST_LIST_ITEM_INTEGRITY( pxNewListItem );
|
|
|
|
/* Insert a new list item into pxList, but rather than sort the list,
|
|
* makes the new list item the last item to be removed by a call to
|
|
* listGET_OWNER_OF_NEXT_ENTRY(). */
|
|
pxNewListItem->pxNext = pxIndex;
|
|
pxNewListItem->pxPrevious = pxIndex->pxPrevious;
|
|
|
|
/* Only used during decision coverage testing. */
|
|
mtCOVERAGE_TEST_DELAY();
|
|
|
|
pxIndex->pxPrevious->pxNext = pxNewListItem;
|
|
pxIndex->pxPrevious = pxNewListItem;
|
|
|
|
/* Remember which list the item is in. */
|
|
pxNewListItem->pxContainer = pxList;
|
|
|
|
( pxList->uxNumberOfItems )++;
|
|
}
|
|
/*-----------------------------------------------------------*/
|
|
|
|
void vListInsert( List_t * const pxList,
|
|
ListItem_t * const pxNewListItem )
|
|
{
|
|
ListItem_t * pxIterator;
|
|
const TickType_t xValueOfInsertion = pxNewListItem->xItemValue;
|
|
|
|
/* Only effective when configASSERT() is also defined, these tests may catch
|
|
* the list data structures being overwritten in memory. They will not catch
|
|
* data errors caused by incorrect configuration or use of FreeRTOS. */
|
|
listTEST_LIST_INTEGRITY( pxList );
|
|
listTEST_LIST_ITEM_INTEGRITY( pxNewListItem );
|
|
|
|
/* Insert the new list item into the list, sorted in xItemValue order.
|
|
*
|
|
* If the list already contains a list item with the same item value then the
|
|
* new list item should be placed after it. This ensures that TCBs which are
|
|
* stored in ready lists (all of which have the same xItemValue value) get a
|
|
* share of the CPU. However, if the xItemValue is the same as the back marker
|
|
* the iteration loop below will not end. Therefore the value is checked
|
|
* first, and the algorithm slightly modified if necessary. */
|
|
if( xValueOfInsertion == portMAX_DELAY )
|
|
{
|
|
pxIterator = pxList->xListEnd.pxPrevious;
|
|
}
|
|
else
|
|
{
|
|
/* *** NOTE ***********************************************************
|
|
* If you find your application is crashing here then likely causes are
|
|
* listed below. In addition see https://www.FreeRTOS.org/FAQHelp.html for
|
|
* more tips, and ensure configASSERT() is defined!
|
|
* https://www.FreeRTOS.org/a00110.html#configASSERT
|
|
*
|
|
* 1) Stack overflow -
|
|
* see https://www.FreeRTOS.org/Stacks-and-stack-overflow-checking.html
|
|
* 2) Incorrect interrupt priority assignment, especially on Cortex-M
|
|
* parts where numerically high priority values denote low actual
|
|
* interrupt priorities, which can seem counter intuitive. See
|
|
* https://www.FreeRTOS.org/RTOS-Cortex-M3-M4.html and the definition
|
|
* of configMAX_SYSCALL_INTERRUPT_PRIORITY on
|
|
* https://www.FreeRTOS.org/a00110.html
|
|
* 3) Calling an API function from within a critical section or when
|
|
* the scheduler is suspended, or calling an API function that does
|
|
* not end in "FromISR" from an interrupt.
|
|
* 4) Using a queue or semaphore before it has been initialised or
|
|
* before the scheduler has been started (are interrupts firing
|
|
* before vTaskStartScheduler() has been called?).
|
|
**********************************************************************/
|
|
|
|
for( pxIterator = ( ListItem_t * ) &( pxList->xListEnd ); pxIterator->pxNext->xItemValue <= xValueOfInsertion; pxIterator = pxIterator->pxNext ) /*lint !e826 !e740 !e9087 The mini list structure is used as the list end to save RAM. This is checked and valid. *//*lint !e440 The iterator moves to a different value, not xValueOfInsertion. */
|
|
{
|
|
/* There is nothing to do here, just iterating to the wanted
|
|
* insertion position. */
|
|
}
|
|
}
|
|
|
|
pxNewListItem->pxNext = pxIterator->pxNext;
|
|
pxNewListItem->pxNext->pxPrevious = pxNewListItem;
|
|
pxNewListItem->pxPrevious = pxIterator;
|
|
pxIterator->pxNext = pxNewListItem;
|
|
|
|
/* Remember which list the item is in. This allows fast removal of the
|
|
* item later. */
|
|
pxNewListItem->pxContainer = pxList;
|
|
|
|
( pxList->uxNumberOfItems )++;
|
|
}
|
|
/*-----------------------------------------------------------*/
|
|
|
|
UBaseType_t uxListRemove( ListItem_t * const pxItemToRemove )
|
|
{
|
|
/* The list item knows which list it is in. Obtain the list from the list
|
|
* item. */
|
|
List_t * const pxList = pxItemToRemove->pxContainer;
|
|
|
|
pxItemToRemove->pxNext->pxPrevious = pxItemToRemove->pxPrevious;
|
|
pxItemToRemove->pxPrevious->pxNext = pxItemToRemove->pxNext;
|
|
|
|
/* Only used during decision coverage testing. */
|
|
mtCOVERAGE_TEST_DELAY();
|
|
|
|
/* Make sure the index is left pointing to a valid item. */
|
|
if( pxList->pxIndex == pxItemToRemove )
|
|
{
|
|
pxList->pxIndex = pxItemToRemove->pxPrevious;
|
|
}
|
|
else
|
|
{
|
|
mtCOVERAGE_TEST_MARKER();
|
|
}
|
|
|
|
pxItemToRemove->pxContainer = NULL;
|
|
( pxList->uxNumberOfItems )--;
|
|
|
|
return pxList->uxNumberOfItems;
|
|
}
|
|
/*-----------------------------------------------------------*/
|