mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-30 08:40:07 +00:00
ad4f43a234
This patch simplify sigpause by remobing the single thread optimization since it will be handled already by the __sigsuspend call. Checked on x86_64-linux-gnu. * sysdeps/posix/sigpause.c (do_sigpause): Remove. (__sigpause): Rely on __sigsuspend to implement single thread optimization. Add LIBC_CANCEL_HANDLED for cancellation marking. Signed-off-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> Reviewed-by: Zack Weinberg <zackw@panix.com>
76 lines
2.3 KiB
C
76 lines
2.3 KiB
C
/* Copyright (C) 1991-2017 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
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#define sigpause __rename_sigpause
|
|
#include <errno.h>
|
|
#include <signal.h>
|
|
#include <stddef.h> /* For NULL. */
|
|
#undef sigpause
|
|
|
|
#include <sigset-cvt-mask.h>
|
|
#include <sysdep-cancel.h>
|
|
|
|
int
|
|
__sigpause (int sig_or_mask, int is_sig)
|
|
{
|
|
sigset_t set;
|
|
|
|
if (is_sig != 0)
|
|
{
|
|
/* The modern X/Open implementation is requested. */
|
|
if (__sigprocmask (0, NULL, &set) < 0
|
|
|| sigdelset (&set, sig_or_mask) < 0)
|
|
return -1;
|
|
}
|
|
else if (sigset_set_old_mask (&set, sig_or_mask) < 0)
|
|
return -1;
|
|
|
|
/* Note the sigpause() is a cancellation point. But since we call
|
|
sigsuspend() which itself is a cancellation point we do not have
|
|
to do anything here. */
|
|
return __sigsuspend (&set);
|
|
}
|
|
libc_hidden_def (__sigpause)
|
|
|
|
/* We have to provide a default version of this function since the
|
|
standards demand it. The version which is a bit more reasonable is
|
|
the BSD version. So make this the default. */
|
|
int
|
|
__attribute__ ((weak))
|
|
__default_sigpause (int mask)
|
|
{
|
|
return __sigpause (mask, 0);
|
|
}
|
|
#undef sigpause
|
|
weak_alias (__default_sigpause, sigpause)
|
|
strong_alias (__default_sigpause, __libc_sigpause)
|
|
|
|
|
|
/* We have to provide a default version of this function since the
|
|
standards demand it. The version which is a bit more reasonable is
|
|
the BSD version. So make this the default. */
|
|
int
|
|
__attribute__ ((weak))
|
|
__xpg_sigpause (int sig)
|
|
{
|
|
return __sigpause (sig, 1);
|
|
}
|
|
strong_alias (__xpg_sigpause, __libc___xpg_sigpause)
|
|
|
|
/* __sigsuspend handles cancellation. */
|
|
LIBC_CANCEL_HANDLED ();
|