Updated free list interface

I realized my existing interface wouldn't work
if the coalescing or adding of a new node replaced
the head of the list, as there was no way to
communicate that back to the caller. As a result,
I've updated those interfaces to accept a pointer
to the free list head pointer. This will let them
change the free list head in alloc.c if necessary.

1 files changed, 3 insertions, 9 deletions

diff --git a/src/alloc.c b/src/alloc.c
index c13b1e8..830e49f 100644
--- a/src/alloc.c
+++ b/src/alloc.c
@@ -12,13 +12,7 @@
 #include "alloc.h"
 #include "constants.h"
 #include "free_list.h"
-
-typedef struct header {
-  size_t size;
-  size_t magic_number;
-} header;
-
-static_assert(sizeof(header) % ALIGNMENT == 0, "Header improperly aligned");
+#include "alloc_header.h"
 
 static void *heap_start = 0;
 static void *heap_end = 0;
@@ -59,7 +53,7 @@ void *allocate(size_t size) {
   /* first check for a suitable memory block on the free list */
   free_nd *nd = fl_find_first_fit(free_list, size);
   if (nd) {
-    void *return_region = fl_split_node(free_list, nd, size);
+    void *return_region = fl_split_node(&free_list, nd, size);
   }
 
   /*
@@ -82,6 +76,6 @@ void *allocate(size_t size) {
 }
 
 void release(void *ptr) {
-  fl_add_node(free_list, ptr);
+  fl_add_node(&free_list, ptr);
   fl_coalesce_nodes(free_list);
 }