Edit File: sigset.h
/* __sig_atomic_t, __sigset_t, and related definitions. Linux version. Copyright (C) 1991, 1992, 1994, 1996, 1997, 2007 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. */ #ifndef _SIGSET_H_types # define _SIGSET_H_types 1 typedef int __sig_atomic_t; /* A `sigset_t' has a bit for each signal. */ # define _SIGSET_NWORDS (1024 / (8 * sizeof (unsigned long int))) typedef struct { unsigned long int __val[_SIGSET_NWORDS]; } __sigset_t; #endif /* We only want to define these functions if <signal.h> was actually included; otherwise we were included just to define the types. Since we are namespace-clean, it wouldn't hurt to define extra macros. But trouble can be caused by functions being defined (e.g., any global register vars declared later will cause compilation errors). */ #if !defined _SIGSET_H_fns && defined _SIGNAL_H # define _SIGSET_H_fns 1 # ifndef _EXTERN_INLINE # define _EXTERN_INLINE __extern_inline # endif /* Return a mask that includes the bit for SIG only. */ # define __sigmask(sig) \ (((unsigned long int) 1) << (((sig) - 1) % (8 * sizeof (unsigned long int)))) /* Return the word index for SIG. */ # define __sigword(sig) (((sig) - 1) / (8 * sizeof (unsigned long int))) # if defined __GNUC__ && __GNUC__ >= 2 # define __sigemptyset(set) \ (__extension__ ({ int __cnt = _SIGSET_NWORDS; \ sigset_t *__set = (set); \ while (--__cnt >= 0) __set->__val[__cnt] = 0; \ 0; })) # define __sigfillset(set) \ (__extension__ ({ int __cnt = _SIGSET_NWORDS; \ sigset_t *__set = (set); \ while (--__cnt >= 0) __set->__val[__cnt] = ~0UL; \ 0; })) # ifdef __USE_GNU /* The POSIX does not specify for handling the whole signal set in one command. This is often wanted and so we define three more functions here. */ # define __sigisemptyset(set) \ (__extension__ ({ int __cnt = _SIGSET_NWORDS; \ const sigset_t *__set = (set); \ int __ret = __set->__val[--__cnt]; \ while (!__ret && --__cnt >= 0) \ __ret = __set->__val[__cnt]; \ __ret == 0; })) # define __sigandset(dest, left, right) \ (__extension__ ({ int __cnt = _SIGSET_NWORDS; \ sigset_t *__dest = (dest); \ const sigset_t *__left = (left); \ const sigset_t *__right = (right); \ while (--__cnt >= 0) \ __dest->__val[__cnt] = (__left->__val[__cnt] \ & __right->__val[__cnt]); \ 0; })) # define __sigorset(dest, left, right) \ (__extension__ ({ int __cnt = _SIGSET_NWORDS; \ sigset_t *__dest = (dest); \ const sigset_t *__left = (left); \ const sigset_t *__right = (right); \ while (--__cnt >= 0) \ __dest->__val[__cnt] = (__left->__val[__cnt] \ | __right->__val[__cnt]); \ 0; })) # endif # endif /* These functions needn't check for a bogus signal number -- error checking is done in the non __ versions. */ extern int __sigismember (__const __sigset_t *, int); extern int __sigaddset (__sigset_t *, int); extern int __sigdelset (__sigset_t *, int); # ifdef __USE_EXTERN_INLINES # define __SIGSETFN(NAME, BODY, CONST) \ _EXTERN_INLINE int \ NAME (CONST __sigset_t *__set, int __sig) \ { \ unsigned long int __mask = __sigmask (__sig); \ unsigned long int __word = __sigword (__sig); \ return BODY; \ } __SIGSETFN (__sigismember, (__set->__val[__word] & __mask) ? 1 : 0, __const) __SIGSETFN (__sigaddset, ((__set->__val[__word] |= __mask), 0), ) __SIGSETFN (__sigdelset, ((__set->__val[__word] &= ~__mask), 0), ) # undef __SIGSETFN # endif #endif /* ! _SIGSET_H_fns. */
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