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66 lines
2.0 KiB
C
66 lines
2.0 KiB
C
/* Convert between lowlevel sigmask and libc representation of sigset_t.
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Generic version.
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Copyright (C) 1998-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Joe Keane <jgk@jgk.org>.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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/* Convert between an old-style 32-bit signal mask and a POSIX sigset_t. */
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#include <sigsetops.h>
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/* Perform *SET = MASK. Unused bits of *SET are set to 0.
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Returns zero for success or -1 for errors (from sigaddset/sigemptyset). */
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static inline int __attribute__ ((unused))
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sigset_set_old_mask (sigset_t *set, int mask)
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{
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if (sizeof (__sigset_t) == sizeof (unsigned int))
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*set = (unsigned int) mask;
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else
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{
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unsigned int __sig;
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if (__sigemptyset (set) < 0)
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return -1;
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for (__sig = 1; __sig < NSIG && __sig <= sizeof (mask) * 8; __sig++)
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if (mask & sigmask (__sig))
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if (__sigaddset (set, __sig) < 0)
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return -1;
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}
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return 0;
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}
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/* Return the sigmask corresponding to *SET.
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Unused bits of *SET are thrown away. */
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static inline int __attribute__ ((unused))
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sigset_get_old_mask (const sigset_t *set)
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{
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if (sizeof (sigset_t) == sizeof (unsigned int))
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return (unsigned int) *set;
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else
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{
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unsigned int mask = 0;
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unsigned int sig;
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for (sig = 1; sig < NSIG && sig <= sizeof (mask) * 8; sig++)
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if (__sigismember (set, sig))
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mask |= sigmask (sig);
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return mask;
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}
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}
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