mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-12 06:10:10 +00:00
dd535f4f19
It was raised on libc-help [1] that some Linux kernel interfaces expect
the libc to define __USE_TIME_BITS64 to indicate the time_t size for the
kABI. Different than defined by the initial y2038 design document [2],
the __USE_TIME_BITS64 is only defined for ABIs that support more than
one time_t size (by defining the _TIME_BITS for each module).
The 64 bit time_t redirects are now enabled using a different internal
define (__USE_TIME64_REDIRECTS). There is no expected change in semantic
or code generation.
Checked on x86_64-linux-gnu, i686-linux-gnu, aarch64-linux-gnu, and
arm-linux-gnueabi
[1] https://sourceware.org/pipermail/libc-help/2024-January/006557.html
[2] https://sourceware.org/glibc/wiki/Y2038ProofnessDesign
Reviewed-by: DJ Delorie <dj@redhat.com>
(cherry picked from commit a4ed0471d7)
91 lines
3.0 KiB
C
91 lines
3.0 KiB
C
/* Compatibility definitions for System V `poll' interface.
|
|
Copyright (C) 1994-2024 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
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, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef _SYS_POLL_H
|
|
#define _SYS_POLL_H 1
|
|
|
|
#include <features.h>
|
|
|
|
/* Get the platform dependent bits of `poll'. */
|
|
#include <bits/poll.h>
|
|
#ifdef __USE_GNU
|
|
# include <bits/types/__sigset_t.h>
|
|
# include <bits/types/struct_timespec.h>
|
|
#endif
|
|
|
|
|
|
/* Type used for the number of file descriptors. */
|
|
typedef unsigned long int nfds_t;
|
|
|
|
/* Data structure describing a polling request. */
|
|
struct pollfd
|
|
{
|
|
int fd; /* File descriptor to poll. */
|
|
short int events; /* Types of events poller cares about. */
|
|
short int revents; /* Types of events that actually occurred. */
|
|
};
|
|
|
|
|
|
__BEGIN_DECLS
|
|
|
|
/* Poll the file descriptors described by the NFDS structures starting at
|
|
FDS. If TIMEOUT is nonzero and not -1, allow TIMEOUT milliseconds for
|
|
an event to occur; if TIMEOUT is -1, block until an event occurs.
|
|
Returns the number of file descriptors with events, zero if timed out,
|
|
or -1 for errors.
|
|
|
|
This function is a cancellation point and therefore not marked with
|
|
__THROW. */
|
|
extern int poll (struct pollfd *__fds, nfds_t __nfds, int __timeout)
|
|
__fortified_attr_access (__write_only__, 1, 2);
|
|
|
|
#ifdef __USE_GNU
|
|
/* Like poll, but before waiting the threads signal mask is replaced
|
|
with that specified in the fourth parameter. For better usability,
|
|
the timeout value is specified using a TIMESPEC object.
|
|
|
|
This function is a cancellation point and therefore not marked with
|
|
__THROW. */
|
|
extern int ppoll (struct pollfd *__fds, nfds_t __nfds,
|
|
const struct timespec *__timeout,
|
|
const __sigset_t *__ss)
|
|
__fortified_attr_access (__write_only__, 1, 2);
|
|
|
|
# ifdef __USE_TIME64_REDIRECTS
|
|
# ifdef __REDIRECT
|
|
extern int __REDIRECT (ppoll, (struct pollfd *__fds, nfds_t __nfds,
|
|
const struct timespec *__timeout,
|
|
const __sigset_t *__ss),
|
|
__ppoll64)
|
|
__fortified_attr_access (__write_only__, 1, 2);
|
|
# else
|
|
# define ppoll __ppoll64
|
|
# endif
|
|
# endif
|
|
#endif
|
|
|
|
__END_DECLS
|
|
|
|
|
|
/* Define some inlines helping to catch common problems. */
|
|
#if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function
|
|
# include <bits/poll2.h>
|
|
#endif
|
|
|
|
#endif /* sys/poll.h */
|