implemented arena allocator

core/arena.c

@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: BSD-3-Clause
+#include "arena.h"
+#include <stdlib.h>
+
+struct arena_allocator *arena_init(usize size)
+{
+	struct arena_allocator *allocator = (struct arena_allocator *) malloc(sizeof(struct arena_allocator));
+	allocator->size = size;
+	allocator->base = (usize) malloc(size);
+	allocator->position = 0;
+
+	return allocator;
+}
+
+void arena_deinit(struct arena_allocator *allocator)
+{
+	free((void *)allocator->base);
+	free((void *)allocator);
+}
+
+void *arena_alloc(struct arena_allocator *allocator, usize size)
+{
+	void *ptr = (void *)(allocator->base + allocator->position);
+	allocator->position += size;
+	return ptr;
+}
+
+void *arena_zalloc(struct arena_allocator *allocator, usize size)
+{
+	void *ptr = arena_alloc(allocator, size);
+	for (usize i=0; i < size; i++) {
+		((u8 *)ptr)[i] = 0x0;
+	}
+
+	return ptr;
+}
+
+void arena_bump(struct arena_allocator *allocator)
+{
+	allocator->position = 0;
+}