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* include/fcntl.h: Declare __have_atfcts.
* 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.
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Ulrich Drepper
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Jan 20, 2006
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@@ -110,5 +110,7 @@ libc { | |
readlinkat; | ||
symlinkat; | ||
unlinkat; | ||
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ppoll; | ||
} | ||
} |
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@@ -0,0 +1,76 @@ | ||
/* 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. */ | ||
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#include <errno.h> | ||
#include <limits.h> | ||
#include <signal.h> | ||
#include <stddef.h> /* For NULL. */ | ||
#include <sys/poll.h> | ||
#include <sysdep-cancel.h> | ||
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int | ||
ppoll (struct pollfd *fds, nfds_t nfds, const struct timespec *timeout, | ||
const sigset_t *sigmask) | ||
{ | ||
int tval = -1; | ||
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/* 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; | ||
} | ||
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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); | ||
} | ||
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/* 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); | ||
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/* 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); | ||
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if (sigmask != NULL) | ||
__sigprocmask (SIG_SETMASK, &savemask, NULL); | ||
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return retval; | ||
} | ||
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#ifndef ppoll | ||
/* __poll handles cancellation. */ | ||
LIBC_CANCEL_HANDLED (); | ||
#endif |
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