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/arena.h

@@ -0,0 +1,91 @@
+#if !defined(LD_CORE_ARENA_H_)
+#define LD_CORE_ARENA_H_
+
+#define AlignUp(x, a) (((x) + ~((a) - 1)) & ~((a) - 1))
+#define AlignDown(x, a) (((x)) & ~((a) - 1))
+
+#define KB(x) ((U64) (x) << 10)
+#define MB(x) ((U64) (x) << 20)
+#define GB(x) ((U64) (x) << 30)
+
+#if !defined(M_ARENA_CHAIN_RESERVE)
+	#define M_ARENA_CHAIN_RESERVE MB(4)
+#endif
+
+function void *M_ZeroSize(void *base, U64 size);
+function void *M_CopySize(void *dst, void *src, U64 size);
+
+typedef U32 M_ArenaFlags;
+enum {
+	// Arena is fixed size, so will not chain
+	M_ARENA_FIXED_SIZE = (1 << 0),
+	// Don't clear allocation
+	M_ARENA_NO_ZERO    = (1 << 1)
+
+};
+
+typedef union M_Arena M_Arena;
+union M_Arena {
+	struct {
+		M_Arena *current;
+		M_Arena *prev;
+
+		U64 base;
+		U64 limit;
+		U64 offset;
+
+		U64 committed;
+		U64 increment;
+
+		M_ArenaFlags flags;
+	};
+
+	U8 __pad[64];
+};
+
+typedef struct M_ArenaOpts M_ArenaOpts;
+struct M_ArenaOpts {
+	U64 initial;
+	U64 increment;
+
+	M_ArenaFlags flags;
+};
+
+typedef struct M_ArenaPushOpts M_ArenaPushOpts;
+struct M_ArenaPushOpts {
+	U64 count;
+	U64 align;
+
+	M_ArenaFlags flags;
+};
+
+function M_Arena *_M_ArenaAlloc(U64 limit, M_ArenaOpts *opts);
+function void    *_M_ArenaPush(M_Arena *arena, U64 esize, M_ArenaPushOpts *opts);
+function void    *_M_ArenaPushCopy(M_Arena *arena, void *src, U64 esize, M_ArenaPushOpts *opts);
+
+#define M_ArenaAlloc(limit, ...) _M_ArenaAlloc(limit, &(M_ArenaOpts) { .initial = MB(1), .increment = KB(64), ##__VA_ARGS__ })
+#define M_ArenaPush(arena, T, ...) (T *) _M_ArenaPush(arena, sizeof(T), &(M_ArenaOpts) { .count = 1, .align = Alignof(T), ##__VA_ARGS__ })
+#define M_ArenaPushCopy(arena, T, src, ...) (T *) _M_ArenaPush(arena, src, sizeof(T), &(M_ArenaOpts) { .count = 1, .align = Alignof(T), ##__VA_ARGS__ })
+
+function void M_ArenaReset(M_Arena *arena);
+function void M_ArenaRelease(M_Arena *arena);
+
+function U64 M_ArenaOffset(M_Arena *arena);
+
+function void M_ArenaPop(M_Arena *arena, U64 offset);
+function void M_ArenaPopSize(M_Arena *arena, U64 size);
+
+// Temporary memory
+
+typedef struct M_Temp M_Temp;
+struct M_Temp {
+	M_Arena *arena;
+	U64 offset;
+};
+
+function M_Temp M_TempAcquire(U64 count, M_Arena **conflicts);
+function void   M_TempRelease(M_Temp temp);
+
+#define M_TempScope(n, c) for (M_Temp temp = M_TempAcquire(n, c); temp.arena != 0; M_TempRelease(temp), temp.arena = 0)
+
+#endif  // LD_CORE_ARENA_H_