--- nono/lib/kevent.h	2026/04/29 17:05:05	1.1.1.1
+++ nono/lib/kevent.h	2026/04/29 17:05:08	1.1.1.2
@@ -4,8 +4,14 @@
 // Licensed under nono-license.txt
 //
 
+//
+// kqueue/kevent をいろいろ便利にする
+//
+
 #pragma once
 
+#include "header.h"
+
 #include <sys/types.h>
 #if defined(HAVE_SYS_EVENT_H)
 #include <sys/event.h>
@@ -18,5 +24,26 @@
 // udata の型は環境によって異なる
 using kevent_udata_t = decltype(kevent::udata);
 
+// udata と int の相互変換
+static inline kevent_udata_t
+EV_INT2UDATA(int x)
+{
+	return (kevent_udata_t)(intptr_t)x;
+}
+static inline int
+EV_UDATA2INT(kevent_udata_t x)
+{
+	return (int)(intptr_t)x;
+}
+
 #define kevent_set(k, e, n)		kevent((k), (e), (n), NULL, 0, NULL)
 #define kevent_poll(k, e, n, t)	kevent((k), NULL, 0, (e), (n), (t))
+
+static inline int
+kevent_add(int kq, int fd, int filter, int action, int udata)
+{
+	struct kevent kev;
+
+	EV_SET(&kev, fd, filter, action, 0, 0, EV_INT2UDATA(udata));
+	return kevent_set(kq, &kev, 1);
+}