[Fix] Type for pointers operations (FreeRTOS#550)

* fix type for pointers operations in some places: size_t -> portPOINTER_SIZE_TYPE

* fix pointer arithmetics

* fix xAddress type

Author: Octaviarius

portable/MemMang/heap_2.c

@@ -353,7 +353,7 @@ static void prvHeapInit( void ) /* PRIVILEGED_FUNCTION */
 
     /* To start with there is a single free block that is sized to take up the
      * entire heap space. */
-    pxFirstFreeBlock = ( void * ) pucAlignedHeap;
+    pxFirstFreeBlock = ( BlockLink_t * ) pucAlignedHeap;
     pxFirstFreeBlock->xBlockSize = configADJUSTED_HEAP_SIZE;
     pxFirstFreeBlock->pxNextFreeBlock = &xEnd;
 }

portable/MemMang/heap_4.c

@@ -377,17 +377,17 @@ static void prvHeapInit( void ) /* PRIVILEGED_FUNCTION */
 {
     BlockLink_t * pxFirstFreeBlock;
     uint8_t * pucAlignedHeap;
-    size_t uxAddress;
+    portPOINTER_SIZE_TYPE uxAddress;
     size_t xTotalHeapSize = configTOTAL_HEAP_SIZE;
 
     /* Ensure the heap starts on a correctly aligned boundary. */
-    uxAddress = ( size_t ) ucHeap;
+    uxAddress = ( portPOINTER_SIZE_TYPE ) ucHeap;
 
     if( ( uxAddress & portBYTE_ALIGNMENT_MASK ) != 0 )
     {
         uxAddress += ( portBYTE_ALIGNMENT - 1 );
-        uxAddress &= ~( ( size_t ) portBYTE_ALIGNMENT_MASK );
-        xTotalHeapSize -= uxAddress - ( size_t ) ucHeap;
+        uxAddress &= ~( ( portPOINTER_SIZE_TYPE ) portBYTE_ALIGNMENT_MASK );
+        xTotalHeapSize -= uxAddress - ( portPOINTER_SIZE_TYPE ) ucHeap;
     }
 
     pucAlignedHeap = ( uint8_t * ) uxAddress;
@@ -399,17 +399,17 @@ static void prvHeapInit( void ) /* PRIVILEGED_FUNCTION */
 
     /* pxEnd is used to mark the end of the list of free blocks and is inserted
      * at the end of the heap space. */
-    uxAddress = ( ( size_t ) pucAlignedHeap ) + xTotalHeapSize;
+    uxAddress = ( ( portPOINTER_SIZE_TYPE ) pucAlignedHeap ) + xTotalHeapSize;
     uxAddress -= xHeapStructSize;
-    uxAddress &= ~( ( size_t ) portBYTE_ALIGNMENT_MASK );
-    pxEnd = ( void * ) uxAddress;
+    uxAddress &= ~( ( portPOINTER_SIZE_TYPE ) portBYTE_ALIGNMENT_MASK );
+    pxEnd = ( BlockLink_t * ) uxAddress;
     pxEnd->xBlockSize = 0;
     pxEnd->pxNextFreeBlock = NULL;
 
     /* To start with there is a single free block that is sized to take up the
      * entire heap space, minus the space taken by pxEnd. */
-    pxFirstFreeBlock = ( void * ) pucAlignedHeap;
-    pxFirstFreeBlock->xBlockSize = uxAddress - ( size_t ) pxFirstFreeBlock;
+    pxFirstFreeBlock = ( BlockLink_t * ) pucAlignedHeap;
+    pxFirstFreeBlock->xBlockSize = ( size_t ) ( uxAddress - ( portPOINTER_SIZE_TYPE ) pxFirstFreeBlock );
     pxFirstFreeBlock->pxNextFreeBlock = pxEnd;
 
     /* Only one block exists - and it covers the entire usable heap space. */

portable/MemMang/heap_5.c

@@ -442,10 +442,10 @@ static void prvInsertBlockIntoFreeList( BlockLink_t * pxBlockToInsert )
 void vPortDefineHeapRegions( const HeapRegion_t * const pxHeapRegions )
 {
     BlockLink_t * pxFirstFreeBlockInRegion = NULL, * pxPreviousFreeBlock;
-    size_t xAlignedHeap;
+    portPOINTER_SIZE_TYPE xAlignedHeap;
     size_t xTotalRegionSize, xTotalHeapSize = 0;
     BaseType_t xDefinedRegions = 0;
-    size_t xAddress;
+    portPOINTER_SIZE_TYPE xAddress;
     const HeapRegion_t * pxHeapRegion;
 
     /* Can only call once! */
@@ -458,15 +458,15 @@ void vPortDefineHeapRegions( const HeapRegion_t * const pxHeapRegions )
         xTotalRegionSize = pxHeapRegion->xSizeInBytes;
 
         /* Ensure the heap region starts on a correctly aligned boundary. */
-        xAddress = ( size_t ) pxHeapRegion->pucStartAddress;
+        xAddress = ( portPOINTER_SIZE_TYPE ) pxHeapRegion->pucStartAddress;
 
         if( ( xAddress & portBYTE_ALIGNMENT_MASK ) != 0 )
         {
             xAddress += ( portBYTE_ALIGNMENT - 1 );
             xAddress &= ~portBYTE_ALIGNMENT_MASK;
 
             /* Adjust the size for the bytes lost to alignment. */
-            xTotalRegionSize -= xAddress - ( size_t ) pxHeapRegion->pucStartAddress;
+            xTotalRegionSize -= ( size_t ) ( xAddress - ( portPOINTER_SIZE_TYPE ) pxHeapRegion->pucStartAddress );
         }
 
         xAlignedHeap = xAddress;
@@ -506,7 +506,7 @@ void vPortDefineHeapRegions( const HeapRegion_t * const pxHeapRegions )
          * sized to take up the entire heap region minus the space taken by the
          * free block structure. */
         pxFirstFreeBlockInRegion = ( BlockLink_t * ) xAlignedHeap;
-        pxFirstFreeBlockInRegion->xBlockSize = xAddress - ( size_t ) pxFirstFreeBlockInRegion;
+        pxFirstFreeBlockInRegion->xBlockSize = ( size_t ) ( xAddress - ( portPOINTER_SIZE_TYPE ) pxFirstFreeBlockInRegion );
         pxFirstFreeBlockInRegion->pxNextFreeBlock = pxEnd;
 
         /* If this is not the first region that makes up the entire heap space