Make allocator a class

allocator.h

@@ -3,14 +3,14 @@
 #include <stdint.h>
 
 // Hierarchical bitmap allocator
-struct allocator
+class allocator
 {
     uint64_t size;
     uint64_t last_one_mask;
-    uint64_t mask[];
+    uint64_t *mask;
+public:
+    allocator(uint64_t blocks);
+    ~allocator();
+    void set(uint64_t addr, bool value);
+    uint64_t find_free();
 };
-
-allocator *allocator_create(uint64_t blocks);
-void allocator_destroy(allocator *alloc);
-void allocator_set(allocator *alloc, uint64_t addr, bool value);
-uint64_t allocator_find_free(allocator *alloc);