Move C/C++ sources to src subdirectory

src/allocator.h

@@ -0,0 +1,21 @@
+// Copyright (c) Vitaliy Filippov, 2019+
+// License: VNPL-1.1 (see README.md for details)
+
+#pragma once
+
+#include <stdint.h>
+
+// Hierarchical bitmap allocator
+class allocator
+{
+    uint64_t size;
+    uint64_t free;
+    uint64_t last_one_mask;
+    uint64_t *mask;
+public:
+    allocator(uint64_t blocks);
+    ~allocator();
+    void set(uint64_t addr, bool value);
+    uint64_t find_free();
+    uint64_t get_free_count();
+};