ObjFW  Check-in [3b41905658]

{
	struct kevent event;

	memset(&event, 0, sizeof(event));
	event.ident = object.fileDescriptorForReading;
	event.filter = EVFILT_READ;
	event.flags = EV_ADD;
	/*
	 * Ugly hack required for NetBSD: NetBSD used `intptr_t` for udata, but
#ifndef OF_NETBSD
	event.udata = object;
	 * switched this to `void *` in NetBSD 10.
	 */
	event.udata = (__typeof__(event.udata))object;
#else
	event.udata = (intptr_t)object;
#endif

	if (kevent(_kernelQueue, &event, 1, NULL, 0, NULL) != 0)
		@throw [OFObserveFailedException exceptionWithObserver: self
								 errNo: errno];

	[super addObjectForReading: object];
}

- (void)addObjectForWriting: (id <OFReadyForWritingObserving>)object
{
	struct kevent event;

	memset(&event, 0, sizeof(event));
	event.ident = object.fileDescriptorForWriting;
	event.filter = EVFILT_WRITE;
	event.flags = EV_ADD;
	/*
	 * Ugly hack required for NetBSD: NetBSD used `intptr_t` for udata, but
#ifndef OF_NETBSD
	event.udata = object;
	 * switched this to `void *` in NetBSD 10.
	 */
	event.udata = (__typeof__(event.udata))object;
#else
	event.udata = (intptr_t)object;
#endif

	if (kevent(_kernelQueue, &event, 1, NULL, 0, NULL) != 0)
		@throw [OFObserveFailedException exceptionWithObserver: self
								 errNo: errno];

	[super addObjectForWriting: object];
}