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/* Convert between lowlevel sigmask and libc representation of sigset_t.
Generic version.
Copyright (C) 1998-2021 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/>. */
/* Convert between an old-style 32-bit signal mask and a POSIX sigset_t. */
#include <sigsetops.h>
/* Perform *SET = MASK. Unused bits of *SET are set to 0.
Returns zero for success or -1 for errors (from sigaddset/sigemptyset). */
static inline int __attribute__ ((unused))
sigset_set_old_mask (sigset_t *set, int mask)
{
if (sizeof (__sigset_t) == sizeof (unsigned int))
*set = (unsigned int) mask;
else
{
unsigned int __sig;
if (__sigemptyset (set) < 0)
return -1;
for (__sig = 1; __sig < NSIG && __sig <= sizeof (mask) * 8; __sig++)
if (mask & __sigmask (__sig))
if (__sigaddset (set, __sig) < 0)
return -1;
}
return 0;
}
/* Return the sigmask corresponding to *SET.
Unused bits of *SET are thrown away. */
static inline int __attribute__ ((unused))
sigset_get_old_mask (const sigset_t *set)
{
if (sizeof (sigset_t) == sizeof (unsigned int))
return (unsigned int) *set;
else
{
unsigned int mask = 0;
unsigned int sig;
for (sig = 1; sig < NSIG && sig <= sizeof (mask) * 8; sig++)
if (__sigismember (set, sig))
mask |= __sigmask (sig);
return mask;
}
}
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