Manage int IDs via id_alloc

kernel/id/id_alloc.h

@@ -0,0 +1,21 @@
+#ifndef _KERNEL_ID_ID_ALLOC_H
+#define _KERNEL_ID_ID_ALLOC_H
+
+#include <libk/bm.h>
+#include <libk/std.h>
+#include <sync/spin_lock.h>
+
+struct id_alloc {
+  struct bm bm;
+  spin_lock_t lock;
+};
+
+int id_alloc (struct id_alloc* ida);
+
+void id_free (struct id_alloc* ida, int id);
+
+bool id_alloc_init (struct id_alloc* ida, size_t nbits);
+
+void id_alloc_fini (struct id_alloc* ida);
+
+#endif // _KERNEL_ID_ID_ALLOC_H