libBLOC

diff --git a/list/list_add.c b/list/list_add.c
new file mode 100644
index 0000000..276a158
--- /dev/null
+++ b/list/list_add.c
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2023 Barry
+ *
+ * This file is part of Barry's Little Objects in C Library (libBLOC).
+ *
+ * libBLOC is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later
+ * version.
+ *
+ * libBLOC is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTIBILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * libBLOC.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <BLOC/object.h>
+#include <BLOC/list.h>
+#include "../assert.h"
+#include "../object.h"
+#include "list.h"
+
+/* Add an object to a list */
+void
+list_add(List *list, void *obj)
+{
+	ASSERT(list);
+	ASSERT(obj);
+	struct ObjectHeader *header = object_header(obj);
+	ASSERT(header->magic == OBJECT_MAGIC);
+	if (list->type && list->type != header->type)
+		return;
+
+	struct IterableEntry *entry;
+	entry = malloc(sizeof(struct IterableEntry));
+	entry->prev = entry->next = NULL;
+	entry->obj = obj_get(obj);
+
+	obj_lock(list);
+	list->header.entries++;
+	if (!list->header.start) {
+		list->header.start = list->header.end = entry;
+	} else {
+		list->header.end->next = entry;
+		entry->prev = list->header.end;
+		list->header.end = entry;
+	}
+	obj_unlock(list);
+}