Simplify buddy_startup and remove buddy_cleanup

example.c

@@ -4,30 +4,24 @@
 
 int main(void)
 {
-    #define NUM_PAGES 16
-
     // This is the memory we will allocate from
-    char memory[NUM_PAGES * BUDDY_ALLOC_MAX_BLOCK_SIZE];
+    char memory[1 << 20];
 
-    struct page_info info[NUM_PAGES]; // This is required to keep track of allocation state
-    struct buddy_alloc alloc = buddy_startup(memory, sizeof(memory), info, NUM_PAGES);
+    struct buddy *alloc = buddy_startup(memory, sizeof(memory));
 
     // Allocate some memory (NULL is returned on failure)
-    // If the memory pool passed to the allocator was properly aligned,
-    // you can count to allocate any and all bytes of that pool.
-    char *str1 = buddy_malloc(&alloc, 32);
-    char *str2 = buddy_malloc(&alloc, 32);
+    char *str1 = buddy_malloc(alloc, 32);
+    char *str2 = buddy_malloc(alloc, 32);
 
     strncpy(str1, "Hello", 32);
     strncpy(str2, "world", 32);
 
     printf("%s, %s!\n", str1, str2);
 
-    buddy_free(&alloc, 32, str1);
-    buddy_free(&alloc, 32, str2);
+    buddy_free(alloc, 32, str1);
+    buddy_free(alloc, 32, str2);
 
-    buddy_free(&alloc, 32, str2); // Double frees are caught!
+    buddy_free(alloc, 32, str2); // Double frees are caught!
 
-    buddy_cleanup(&alloc);
     return 0;
-}
+}