beginning to lift vmem ops out of the arena

code/os/os.h

@@ -0,0 +1,22 @@
+#ifdef INTELLISENSE_DIRECTIVES
+#	pragma once
+#	include "context_cracking.h"
+#endif
+
+#if !defined(OS_FEATURE_GRAPHICAL)
+#	define OS_FEATURE_GRAPHICAL 0
+#endif
+
+#if !defined(OS_GFX_STUB)
+#	define OS_GFX_STUB 0
+#endif
+
+#if OS_WINDOWS
+#	include "core/win32/os_core_win32.h"
+#elif OS_LINUX
+#	include "core/linux/os_core_linux.h"
+#else
+#	error OS core layer not implemented for this operating system.
+#endif
+
+#include "core/os_core.h"