Initial commit

arena.h

@@ -0,0 +1,12 @@
+
+#include <stddef.h> // ptrdiff_t
+
+struct arena {
+    void *start,
+         *next;
+    ptrdiff_t cap;
+} __attribute__((aligned(64)));
+
+struct arena* arena_new();
+void arena_reset(struct arena *a);
+void* arena_alloc(struct arena *a, size_t len);