Much more progress, still doesn't compile.

src/c/memory/memory.c

@@ -7,20 +7,41 @@
  *  Licensed under GPL version 2.0, or, at your option, any later version.
  */
 
+#include <stdbool.h>
 #include <stdio.h>
 
+#include "memory/memory.h"
+#include "memory/node.h"
+#include "memory/pointer.h"
+
 /**
  * @brief Freelists for each size class.
- * 
- * TODO: I don't know if that +1 is needed, my mind gets confused by arrays
- * indexed from zero. But it does little harm.
  */
-struct pso_pointer freelists[MAX_SIZE_CLASS + 1];
+struct pso_pointer freelists[MAX_SIZE_CLASS];
 
+/**
+ * @brief Flag to prevent re-initialisation.
+ */
+bool memory_initialised = false;
 
-int initialise_memory( int node ) {
-    for (uint8_t i = 0; i <= MAX_SIZE_CLASS; i++) {
-        freelists[i] = nil;
+/**
+ * @brief Initialise the memory allocation system.
+ *
+ * Essentially, just set up the freelists; allocating pages will then happen
+ * automatically as objects are requested.
+ * 
+ * @param node the index number of the node we are initialising.
+ * @return int 
+ */
+struct pso_pointer initialise_memory( uint32_t node ) {
+    if (memory_initialised) {
+        // TODO: throw an exception
+    } else {
+        for (uint8_t i = 0; i <= MAX_SIZE_CLASS; i++) {
+            freelists[i] = nil;
+        }
+        memory_initialised = true;
     }
-    
+
+    return t;
 }