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109 lines
3.5 KiB
C
109 lines
3.5 KiB
C
/* __sigset_t manipulators. Linux version.
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Copyright (C) 1991-2019 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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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<http://www.gnu.org/licenses/>. */
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#ifndef _SIGSETOPS_H
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#define _SIGSETOPS_H 1
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#include <signal.h>
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/* Return a mask that includes the bit for SIG only. */
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# define __sigmask(sig) \
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(((unsigned long int) 1) << (((sig) - 1) % (8 * sizeof (unsigned long int))))
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/* Return the word index for SIG. */
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# define __sigword(sig) (((sig) - 1) / (8 * sizeof (unsigned long int)))
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# define __sigemptyset(set) \
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(__extension__ ({ \
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int __cnt = _SIGSET_NWORDS; \
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sigset_t *__set = (set); \
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while (--__cnt >= 0) \
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__set->__val[__cnt] = 0; \
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(void)0; \
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}))
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# define __sigfillset(set) \
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(__extension__ ({ \
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int __cnt = _SIGSET_NWORDS; \
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sigset_t *__set = (set); \
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while (--__cnt >= 0) \
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__set->__val[__cnt] = ~0UL; \
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(void)0; \
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}))
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# define __sigisemptyset(set) \
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(__extension__ ({ \
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int __cnt = _SIGSET_NWORDS; \
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const sigset_t *__set = (set); \
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int __ret = __set->__val[--__cnt]; \
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while (!__ret && --__cnt >= 0) \
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__ret = __set->__val[__cnt]; \
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__ret == 0; \
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}))
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# define __sigandset(dest, left, right) \
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(__extension__ ({ \
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int __cnt = _SIGSET_NWORDS; \
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sigset_t *__dest = (dest); \
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const sigset_t *__left = (left); \
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const sigset_t *__right = (right); \
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while (--__cnt >= 0) \
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__dest->__val[__cnt] = (__left->__val[__cnt] \
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& __right->__val[__cnt]); \
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(void)0; \
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}))
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# define __sigorset(dest, left, right) \
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(__extension__ ({ \
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int __cnt = _SIGSET_NWORDS; \
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sigset_t *__dest = (dest); \
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const sigset_t *__left = (left); \
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const sigset_t *__right = (right); \
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while (--__cnt >= 0) \
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__dest->__val[__cnt] = (__left->__val[__cnt] \
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| __right->__val[__cnt]); \
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(void)0; \
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}))
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/* These macros needn't check for a bogus signal number;
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error checking is done in the non-__ versions. */
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# define __sigismember(set, sig) \
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(__extension__ ({ \
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unsigned long int __mask = __sigmask (sig); \
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unsigned long int __word = __sigword (sig); \
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(set)->__val[__word] & __mask ? 1 : 0; \
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}))
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# define __sigaddset(set, sig) \
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(__extension__ ({ \
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unsigned long int __mask = __sigmask (sig); \
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unsigned long int __word = __sigword (sig); \
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(set)->__val[__word] |= __mask; \
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(void)0; \
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}))
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# define __sigdelset(set, sig) \
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(__extension__ ({ \
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unsigned long int __mask = __sigmask (sig); \
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unsigned long int __word = __sigword (sig); \
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(set)->__val[__word] &= ~__mask; \
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(void)0; \
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}))
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#endif /* bits/sigsetops.h */
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