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+/* syspoll.h - System-dependent definitions for the poll function.
+ Copyright (C) 2022 Free Software Foundation, Inc.
+
+This file is part of GNU Emacs.
+
+GNU Emacs 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.
+
+GNU Emacs is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY 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 GNU Emacs. If not, see <https://www.gnu.org/licenses/>. */
+
+#ifndef SYSPOLL_H
+#define SYSPOLL_H 1
+
+#if !defined (DOS_NT) && !defined (WINDOWSNT)
+#include <sys/poll.h>
+
+extern int fd_sets_to_pollfds (emacs_fd_set *, emacs_fd_set *, int);
+extern void pollfds_to_fd_sets (emacs_fd_set *, emacs_fd_set *, int);
+extern int timespec_to_timeout (const struct timespec *);
+extern int emacs_pselect (int, emacs_fd_set *, emacs_fd_set *,
+ emacs_fd_set *, const struct timespec *,
+ const sigset_t *);
+#endif
+#endif