Added memory arena

Fixed frames in flight validation error in vulkan
Added some utility macros
Added function decorator macros
Added some consolidation headers/code include files

code/core/macros.h

@@ -1,9 +1,17 @@
 #if !defined(LD_CORE_MACROS_H_)
 #define LD_CORE_MACROS_H_
 
+#include <assert.h>
+
+#define Assert(exp) assert(exp)
+
 #define ArraySize(x) (sizeof(x) / sizeof((x)[0]))
 #define Min(a, b) ((a) < (b) ? (a) : (b))
 #define Max(a, b) ((a) > (b) ? (a) : (b))
+#define Clamp(min, x, max) (Min(Max(min, x), max))
+#define Clamp01(x) Clamp(0, x, 1)
+
+#define cast(x) (x)
 
 #define _Glue(a, b) a##b
 #define _Stringify(x) #x
@@ -11,5 +19,30 @@
 #define Glue(a, b) _Glue(a, b)
 #define Stringify(x) _Stringify(x)
 
+#if LANG_CPP
+	#define Alignof(x) alignof(x)
+#else
+	#define Alignof(x) _Alignof(x)
+#endif
+
+// Singly linked lists (named members)
+//
+#define SLL_EnqueueN(h, t, n, next) (((h) == 0) ? ((h) = (t) = (n), (n)->next = 0) : ((t)->next = (n), (t) = (n), (n)->next = 0))
+#define SLL_EnqueueFrontN(h, t, n, next) (((h) == 0) ? ((h) = (t) = (n), (n)->next = 0) : ((n)->next = (h), (h) = (n)))
+#define SLL_DequeueN(h, t, next) ((h) == (t) ? ((h) = 0, (t) = 0) : ((h) = (h)->next))
+
+#define SLL_PushN(h, n, next) ((n)->next = (h), (h) = (n))
+#define SLL_PopN(h, next) (((h) != 0) ? (h) = (h)->next : 0)
+
+#define function      static
+#define internal      static
+#define global_var    static
+#define local_persist static
+
+#if COMPILER_CL
+	#define thread_var __declspec(thread)
+#else
+	#define thread_var __thread
+#endif
 
 #endif  // LD_CORE_MACROS_H_