-/*
- * Copyright 2000 Massachusetts Institute of Technology
- *
- * Permission to use, copy, modify, and distribute this software and
- * its documentation for any purpose and without fee is hereby
- * granted, provided that both the above copyright notice and this
- * permission notice appear in all copies, that both the above
- * copyright notice and this permission notice appear in all
- * supporting documentation, and that the name of M.I.T. not be used
- * in advertising or publicity pertaining to distribution of the
- * software without specific, written prior permission. M.I.T. makes
- * no representations about the suitability of this software for any
- * purpose. It is provided "as is" without express or implied
- * warranty.
- *
- * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
- * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
- * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#if (defined(VARIANT_CANCELABLE) || defined(VARIANT_PRE1050)) && __DARWIN_NON_CANCELABLE != 0
-#error cancellable call vs. __DARWIN_NON_CANCELABLE mismatch
-#endif
-
-#ifdef VARIANT_DARWINEXTSN
-#define _DARWIN_UNLIMITED_SELECT
-#endif /* VARIANT_DARWINEXTSN */
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: src/lib/libc/gen/pselect.c,v 1.6 2002/10/12 16:13:37 mike Exp $");
-
-#include "namespace.h"
-#include <sys/types.h>
-#include <sys/select.h>
-#include <sys/time.h>
-#include <unistd.h>
-
-#include <errno.h>
-#include <signal.h>
-#include "un-namespace.h"
-
-__weak_reference(__pselect, pselect);
-
-// Returns -1 and sets errno in contrast to pthread_sigmask which returns errno
-extern int __pthread_sigmask(int, const sigset_t *, sigset_t *);
-
-/*
- * Emulate the POSIX 1003.1g-2000 `pselect' interface. This is the
- * same as the traditional BSD `select' function, except that it uses
- * a timespec rather than a timeval, doesn't modify the timeout argument,
- * and allows the user to specify a signal mask to apply during the select.
- */
-int
-__pselect(int count, fd_set * __restrict rfds, fd_set * __restrict wfds,
- fd_set * __restrict efds, const struct timespec * __restrict timo,
- const sigset_t * __restrict mask)
-{
- sigset_t omask;
- struct timeval tvtimo, *tvp;
- int rv, sverrno;
-
- if (timo) {
- TIMESPEC_TO_TIMEVAL(&tvtimo, timo);
- tvp = &tvtimo;
- } else
- tvp = 0;
-
- if (mask != 0) {
- rv = __pthread_sigmask(SIG_SETMASK, mask, &omask);
- if (rv != 0)
- return rv;
- }
-
- rv = _select(count, rfds, wfds, efds, tvp);
- if (mask != 0) {
- sverrno = errno;
- __pthread_sigmask(SIG_SETMASK, &omask, (sigset_t *)0);
- errno = sverrno;
- }
-
- return rv;
-}
projects / apple / libc.git / commitdiff
