Memory: Factorize virtual memory reservation/allocation code in function

Utilities/VirtualMemory.h

@@ -0,0 +1,22 @@
+#pragma once
+
+namespace memory_helper
+{
+	/**
+	* Reserve size bytes of virtual memory and returns it.
+	* The memory should be commited before usage.
+	*/
+	void* reserve_memory(size_t size);
+
+	/**
+	* Commit page_size bytes of virtual memory starting at pointer.
+	* That is, bake reserved memory with physical memory.
+	* pointer should belong to a range of reserved memory.
+	*/
+	void commit_page_memory(void* pointer, size_t page_size);
+
+	/**
+	* Free memory alloced via reserve_memory.
+	*/
+	void free_reserved_memory(void* pointer, size_t size);
+}