mirror of
https://sourceware.org/git/glibc.git
synced 2025-11-03 20:53:13 +03:00
112 lines
2.8 KiB
C
112 lines
2.8 KiB
C
/* Copyright (C) 1997,1998,2000,2002-2004,2005 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, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <errno.h>
|
|
#include <signal.h>
|
|
#define __need_NULL
|
|
#include <stddef.h>
|
|
#include <string.h>
|
|
|
|
#include <sysdep-cancel.h>
|
|
#include <sys/syscall.h>
|
|
#include <bp-checks.h>
|
|
|
|
#ifdef __NR_rt_sigtimedwait
|
|
|
|
/* Return any pending signal or wait for one for the given time. */
|
|
static int
|
|
do_sigwait (const sigset_t *set, int *sig)
|
|
{
|
|
int ret;
|
|
|
|
#ifdef SIGCANCEL
|
|
sigset_t tmpset;
|
|
if (set != NULL
|
|
&& (__builtin_expect (__sigismember (set, SIGCANCEL), 0)
|
|
# ifdef SIGSETXID
|
|
|| __builtin_expect (__sigismember (set, SIGSETXID), 0)
|
|
# endif
|
|
))
|
|
{
|
|
/* Create a temporary mask without the bit for SIGCANCEL set. */
|
|
// We are not copying more than we have to.
|
|
memcpy (&tmpset, set, _NSIG / 8);
|
|
__sigdelset (&tmpset, SIGCANCEL);
|
|
# ifdef SIGSETXID
|
|
__sigdelset (&tmpset, SIGSETXID);
|
|
# endif
|
|
set = &tmpset;
|
|
}
|
|
#endif
|
|
|
|
/* XXX The size argument hopefully will have to be changed to the
|
|
real size of the user-level sigset_t. */
|
|
#ifdef INTERNAL_SYSCALL
|
|
INTERNAL_SYSCALL_DECL (err);
|
|
do
|
|
ret = INTERNAL_SYSCALL (rt_sigtimedwait, err, 4, CHECK_SIGSET (set),
|
|
NULL, NULL, _NSIG / 8);
|
|
while (INTERNAL_SYSCALL_ERROR_P (ret, err)
|
|
&& INTERNAL_SYSCALL_ERRNO (ret, err) == EINTR);
|
|
if (! INTERNAL_SYSCALL_ERROR_P (ret, err))
|
|
{
|
|
*sig = ret;
|
|
ret = 0;
|
|
}
|
|
else
|
|
ret = INTERNAL_SYSCALL_ERRNO (ret, err);
|
|
#else
|
|
do
|
|
ret = INLINE_SYSCALL (rt_sigtimedwait, 4, CHECK_SIGSET (set),
|
|
NULL, NULL, _NSIG / 8);
|
|
while (ret == -1 && errno == EINTR);
|
|
if (ret != -1)
|
|
{
|
|
*sig = ret;
|
|
ret = 0;
|
|
}
|
|
else
|
|
ret = errno;
|
|
#endif
|
|
|
|
return ret;
|
|
}
|
|
|
|
int
|
|
__sigwait (set, sig)
|
|
const sigset_t *set;
|
|
int *sig;
|
|
{
|
|
if (SINGLE_THREAD_P)
|
|
return do_sigwait (set, sig);
|
|
|
|
int oldtype = LIBC_CANCEL_ASYNC ();
|
|
|
|
int result = do_sigwait (set, sig);
|
|
|
|
LIBC_CANCEL_RESET (oldtype);
|
|
|
|
return result;
|
|
}
|
|
libc_hidden_def (__sigwait)
|
|
weak_alias (__sigwait, sigwait)
|
|
#else
|
|
# include <sysdeps/posix/sigwait.c>
|
|
#endif
|
|
strong_alias (__sigwait, __libc_sigwait)
|