mirror of
https://sourceware.org/git/glibc.git
synced 2024-09-20 00:19:57 +00:00
7c65e9001b
* sysdeps/unix/sysv/linux/faccessat.c: Use syscall if available. * sysdeps/unix/sysv/linux/fchmodat.c: Likewise. * sysdeps/unix/sysv/linux/fchownat.c: Likewise. * sysdeps/unix/sysv/linux/futimesat.c: Likewise. * sysdeps/unix/sysv/linux/linkat.c: Likewise. * sysdeps/unix/sysv/linux/mkdirat.c: Likewise. * sysdeps/unix/sysv/linux/openat.c: Likewise. * sysdeps/unix/sysv/linux/readlinkat.c: Likewise. * sysdeps/unix/sysv/linux/renameat.c: Likewise. * sysdeps/unix/sysv/linux/symlinkat.c: Likewise. * sysdeps/unix/sysv/linux/unlinkat.c: Likewise. * sysdeps/unix/sysv/linux/xmknodat.c: Likewise. * sysdeps/unix/sysv/linux/wordsize-64/fxstatat.c: Likewise. * sysdeps/unix/sysv/linux/kernel-features.h: Define __ASSUME_PSELECT, __ASSUME_PPOLL, and __ASSUME_ATFCTS if possible. * io/ppoll.c: New file. * io/Makefile (routines): Add ppoll. (CFLAGS-ppoll.c): Define. * io/Versions: Export ppoll for GLIBC_2.4. * io/sys/poll.h: Declare ppoll. * sysdeps/unix/sysv/linux/ppoll.c: New file. * misc/pselect.c: Make it possible to include this file to define the generic code as a static function. * sysdeps/unix/sysv/linux/pselect.c: New file.
77 lines
2.3 KiB
C
77 lines
2.3 KiB
C
/* Copyright (C) 2006 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@redhat.com>, 2006.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <errno.h>
|
|
#include <limits.h>
|
|
#include <signal.h>
|
|
#include <stddef.h> /* For NULL. */
|
|
#include <sys/poll.h>
|
|
#include <sysdep-cancel.h>
|
|
|
|
|
|
int
|
|
ppoll (struct pollfd *fds, nfds_t nfds, const struct timespec *timeout,
|
|
const sigset_t *sigmask)
|
|
{
|
|
int tval = -1;
|
|
|
|
/* poll uses a simple millisecond value. Convert it. */
|
|
if (timeout != NULL)
|
|
{
|
|
if (timeout->tv_sec < 0
|
|
|| timeout->tv_nsec < 0 || timeout->tv_nsec >= 1000000000)
|
|
{
|
|
__set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
|
|
if (timeout->tv_sec > INT_MAX / 1000
|
|
|| (timeout->tv_sec == INT_MAX / 1000
|
|
&& ((timeout->tv_nsec + 999999) / 1000000 > INT_MAX % 1000)))
|
|
/* We cannot represent the timeout in an int value. Wait
|
|
forever. */
|
|
tval = -1;
|
|
else
|
|
tval = (timeout->tv_sec * 1000
|
|
+ (timeout->tv_nsec + 999999) / 1000000);
|
|
}
|
|
|
|
/* The setting and restoring of the signal mask and the select call
|
|
should be an atomic operation. This can't be done without kernel
|
|
help. */
|
|
sigset_t savemask;
|
|
if (sigmask != NULL)
|
|
__sigprocmask (SIG_SETMASK, sigmask, &savemask);
|
|
|
|
/* Note the ppoll() is a cancellation point. But since we call
|
|
poll() which itself is a cancellation point we do not have
|
|
to do anything here. */
|
|
int retval = __poll (fds, nfds, tval);
|
|
|
|
if (sigmask != NULL)
|
|
__sigprocmask (SIG_SETMASK, &savemask, NULL);
|
|
|
|
return retval;
|
|
}
|
|
|
|
#ifndef ppoll
|
|
/* __poll handles cancellation. */
|
|
LIBC_CANCEL_HANDLED ();
|
|
#endif
|