1 files changed, 38 insertions, 0 deletions
diff --git a/src/arena.c b/src/arena.c
new file mode 100644
index 0000000..e38ad20
--- /dev/null
+++ b/src/arena.c
@@ -0,0 +1,38 @@
+/*
+ * arena.c
+ * arena allocator i wrote during a meeting in 30 mins
+ * imogen sorindeia thoms 2025
+ * */
+
+#include <stdlib.h>
+#include <stdint.h>
+
+#include "arena.h"
+
+/* initialize an arena with given capacity */
+mogi_arena_t mogi_arena_init(size_t size) {
+	mogi_arena_t a = {
+			.buffer = calloc(size, 1),
+			.capacity = size
+	};
+	return a;
+}
+
+/* get rid of entire arena */
+void mogi_arena_dispose(mogi_arena_t *a) {
+	if(NULL != a->buffer) {
+		free(a->buffer);
+	}
+}
+
+/* allocate space on arena
+ * TODO: alignment l m f a o
+ */
+uintptr_t mogi_arena_allocate(mogi_arena_t *a, size_t size) {
+	if((NULL == a->buffer) || ((a->posn + size) > a->capacity)) {
+		return (uintptr_t)0;
+	}
+	uintptr_t p = (uintptr_t)(a->buffer + a->posn);
+	a->posn += (uintptr_t)size;
+	return p;
+}