Changeset 94e75cf in mainline

Timestamp:

2020-06-12T16:40:42Z (5 years ago)

Author:

Martin Decky <martin@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

128359eb

Parents:

265be8a

Message:

Compute the memory area overhead more precisely

The memory area not only contains the desired block, but also its header
and footer.

File:

• uspace/lib/c/generic/malloc.c (modified) (1 diff)

uspace/lib/c/generic/malloc.c

@@ -81 +81 @@
         (sizeof(heap_block_head_t) + sizeof(heap_block_foot_t))
 
+/** Calculate real size of a heap block.
+ *
+ * Add header and footer size.
+ *
+ */
+#define GROSS_SIZE(size)  ((size) + STRUCT_OVERHEAD)
+
+/** Calculate net size of a heap block.
+ *
+ * Subtract header and footer size.
+ *
+ */
+#define NET_SIZE(size)  ((size) - STRUCT_OVERHEAD)
+
 /** Overhead of each area. */
 #define AREA_OVERHEAD(size) \
-        (ALIGN_UP(size + sizeof(heap_area_t), BASE_ALIGN))
-
-/** Calculate real size of a heap block.
- *
- * Add header and footer size.
- *
- */
-#define GROSS_SIZE(size)  ((size) + STRUCT_OVERHEAD)
-
-/** Calculate net size of a heap block.
- *
- * Subtract header and footer size.
- *
- */
-#define NET_SIZE(size)  ((size) - STRUCT_OVERHEAD)
+        (ALIGN_UP(GROSS_SIZE(size) + sizeof(heap_area_t), BASE_ALIGN))
 
 /** Get first block in heap area.