Add configUSE_MINI_LIST_ITEM configuration option to enable the MiniListItem_t type. (#433)

* Add configUSE_MINI_LIST_ITEM configuration option to enable the MiniListItem_t type.

When configUSE_MINI_LIST_ITEM == 0:
	MiniListItem_t and ListItem_t are both typedefs of struct xLIST_ITEM.

When configUSE_MINI_LIST_ITEM == 1 (the default in projdefs.h):
	MiniListItem_t is a typedef of struct xMINI_LIST_ITEM, which contains 3 fewer fields than a struct xLIST_ITEM.
	This configuration saves approximately sizeof(TickType_t) + 2 * sizeof( void * ) bytes of ram, however it also violates strict aliasing rules which some compilers depend on for optimization.

configUSE_MINI_LIST_ITEM defaults to 1 when not defined.

* Add pp_indent_brace option to uncrustify config

Improves compliance with the FreeRTOS code style guide:
https://www.freertos.org/FreeRTOS-Coding-Standard-and-Style-Guide.html

1 files changed, 11 insertions, 0 deletions

diff --git a/list.c b/list.c
index 2dc598ce3..fb32854a6 100644
--- a/list.c
+++ b/list.c
@@ -54,6 +54,8 @@ void vListInitialise( List_t * const pxList )
      * 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. */

 

+    listSET_FIRST_LIST_ITEM_INTEGRITY_CHECK_VALUE( &( pxList->xListEnd ) );

+

     /* 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;

@@ -63,6 +65,15 @@ void vListInitialise( List_t * const pxList )
     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. */

 

+    /* Initialize the remaining fields of xListEnd when it is a proper ListItem_t */

+    #if ( configUSE_MINI_LIST_ITEM == 0 )

+    {

+        pxList->xListEnd.pvOwner = NULL;

+        pxList->xListEnd.pxContainer = NULL;

+        listSET_SECOND_LIST_ITEM_INTEGRITY_CHECK_VALUE( &( pxList->xListEnd ) );

+    }

+    #endif

+

     pxList->uxNumberOfItems = ( UBaseType_t ) 0U;

 

     /* Write known values into the list if