compat/linux/linux_event.c

615 	struct eventfd *efd;
628 	efd = malloc(sizeof(*efd), M_EPOLL, M_WAITOK | M_ZERO);
629 	efd->efd_flags = flags;
630 	efd->efd_count = initval;
631 	mtx_init(&efd->efd_lock, "eventfd", NULL, MTX_DEF);
633 	knlist_init_mtx(&efd->efd_sel.si_note, &efd->efd_lock);
639 	finit(fp, fflags, DTYPE_LINUXEFD, efd, &eventfdops);
666 	struct eventfd *efd;
668 	efd = fp->f_data;
669 	if (fp->f_type != DTYPE_LINUXEFD || efd == NULL)
672 	seldrain(&efd->efd_sel);
673 	knlist_destroy(&efd->efd_sel.si_note);
676 	mtx_destroy(&efd->efd_lock);
677 	free(efd, M_EPOLL);
686 	struct eventfd *efd;
690 	efd = fp->f_data;
691 	if (fp->f_type != DTYPE_LINUXEFD || efd == NULL)
698 	mtx_lock(&efd->efd_lock);
700 	if (efd->efd_count == 0) {
701 		if ((efd->efd_flags & LINUX_O_NONBLOCK) != 0) {
702 			mtx_unlock(&efd->efd_lock);
705 		error = mtx_sleep(&efd->efd_count, &efd->efd_lock, PCATCH, "lefdrd", 0);
710 		if ((efd->efd_flags & LINUX_EFD_SEMAPHORE) != 0) {
712 			--efd->efd_count;
714 			count = efd->efd_count;
715 			efd->efd_count = 0;
717 		KNOTE_LOCKED(&efd->efd_sel.si_note, 0);
718 		selwakeup(&efd->efd_sel);
719 		wakeup(&efd->efd_count);
720 		mtx_unlock(&efd->efd_lock);
723 		mtx_unlock(&efd->efd_lock);
732 	struct eventfd *efd;
736 	efd = fp->f_data;
737 	if (fp->f_type != DTYPE_LINUXEFD || efd == NULL)
749 	mtx_lock(&efd->efd_lock);
751 	if (UINT64_MAX - efd->efd_count <= count) {
752 		if ((efd->efd_flags & LINUX_O_NONBLOCK) != 0) {
753 			mtx_unlock(&efd->efd_lock);
758 		error = mtx_sleep(&efd->efd_count, &efd->efd_lock,
764 		efd->efd_count += count;
765 		KNOTE_LOCKED(&efd->efd_sel.si_note, 0);
766 		selwakeup(&efd->efd_sel);
767 		wakeup(&efd->efd_count);
769 	mtx_unlock(&efd->efd_lock);
778 	struct eventfd *efd;
781 	efd = fp->f_data;
782 	if (fp->f_type != DTYPE_LINUXEFD || efd == NULL)
785 	mtx_lock(&efd->efd_lock);
786 	if ((events & (POLLIN|POLLRDNORM)) && efd->efd_count > 0)
788 	if ((events & (POLLOUT|POLLWRNORM)) && UINT64_MAX - 1 > efd->efd_count)
791 		selrecord(td, &efd->efd_sel);
792 	mtx_unlock(&efd->efd_lock);
801 	struct eventfd *efd;
803 	efd = fp->f_data;
804 	if (fp->f_type != DTYPE_LINUXEFD || efd == NULL)
807 	mtx_lock(&efd->efd_lock);
816 		mtx_unlock(&efd->efd_lock);
820 	kn->kn_hook = efd;
821 	knlist_add(&efd->efd_sel.si_note, kn, 1);
822 	mtx_unlock(&efd->efd_lock);
830 	struct eventfd *efd = kn->kn_hook;
832 	mtx_lock(&efd->efd_lock);
833 	knlist_remove(&efd->efd_sel.si_note, kn, 1);
834 	mtx_unlock(&efd->efd_lock);
841 	struct eventfd *efd = kn->kn_hook;
844 	mtx_assert(&efd->efd_lock, MA_OWNED);
845 	ret = (efd->efd_count > 0);
854 	struct eventfd *efd = kn->kn_hook;
857 	mtx_assert(&efd->efd_lock, MA_OWNED);
858 	ret = (UINT64_MAX - 1 > efd->efd_count);
877 	struct eventfd *efd;
879 	efd = fp->f_data;
880 	if (fp->f_type != DTYPE_LINUXEFD || efd == NULL)
887 			efd->efd_flags |= LINUX_O_NONBLOCK;
889 			efd->efd_flags &= ~LINUX_O_NONBLOCK;