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List proofs and signoff (#194)

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Nathan Chong 2020-08-27 14:59:12 -04:00 • committed by GitHub
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FreeRTOS/Test/VeriFast/list/vListInitialise.c Normal file
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/*
* FreeRTOS VeriFast Proofs
* Copyright (C) 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.
*/
#include "proof/list.h"
/*@
predicate xLIST_uninitialised(struct xLIST *l) =
l->uxNumberOfItems |-> _ &*&
l->pxIndex |-> _ &*&
l->xListEnd.xItemValue |-> _ &*&
l->xListEnd.pxNext |-> _ &*&
l->xListEnd.pxPrevious |-> _ &*&
l->xListEnd.pvOwner |-> _ &*&
l->xListEnd.pxContainer |-> _ &*&
struct_xLIST_ITEM_padding(&l->xListEnd);
@*/
void vListInitialise( List_t * const pxList )
/*@requires xLIST_uninitialised(pxList);@*/
/*@ensures xLIST(pxList, 0, ?end, end, singleton(end), singleton(portMAX_DELAY));@*/
{
/*@open xLIST_uninitialised(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 );
#ifdef VERIFAST /*< ***change MiniList_t to ListItem_t*** */
pxList->xListEnd.pxContainer = pxList;
#endif
/*@ListItem_t *end = &(pxList->xListEnd);@*/
/*@close xLIST_ITEM(end, portMAX_DELAY, _, _, pxList);@*/
/*@close DLS(end, end, end, end, singleton(end), singleton(portMAX_DELAY), pxList);@*/
/*@close xLIST(pxList, 0, end, end, singleton(end), singleton(portMAX_DELAY));@*/
}