1 /* Copyright (C) 1996-1998,2001,2002,2003,2006 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
23 #include <sys/syscall.h>
24 #include <sys/select.h>
29 static int __NC(pselect)(int nfds, fd_set *readfds, fd_set *writefds,
30 fd_set *exceptfds, const struct timespec *timeout,
31 const sigset_t *sigmask)
37 /* Change nanosecond number to microseconds. This might mean losing
38 precision and therefore the `pselect` should be available. But
39 for now it is hardly found. */
41 TIMESPEC_TO_TIMEVAL (&tval, timeout);
43 /* The setting and restoring of the signal mask and the select call
44 should be an atomic operation. This can't be done without kernel
47 sigprocmask (SIG_SETMASK, sigmask, &savemask);
49 /* The comment below does not apply on uClibc, since we use __select_nocancel */
50 /* Note the pselect() is a cancellation point. But since we call
51 select() which itself is a cancellation point we do not have
52 to do anything here. */
53 retval = __NC(select)(nfds, readfds, writefds, exceptfds,
54 timeout != NULL ? &tval : NULL);
57 sigprocmask (SIG_SETMASK, &savemask, NULL);
61 CANCELLABLE_SYSCALL(int, pselect, (int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
62 const struct timespec *timeout, const sigset_t *sigmask),
63 (nfds, readfds, writefds, exceptfds, timeout, sigmask))