71 lines
1.8 KiB
C
71 lines
1.8 KiB
C
/* @(#)sigdefs.h 1.5 02/01/19 Copyright 1997 J. Schilling */
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/*
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* Signal abstraction for BSD/SVR4 signals
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*
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* Copyright (c) 1997 J. Schilling
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*/
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef _SIGDEFS_H
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#define _SIGDEFS_H
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#ifndef _MCONFIG_H
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#include <mconfig.h>
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#endif
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#ifdef HAVE_SIGSET
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/*
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* Try to by default use the function that sets up signal handlers in a way
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* that does not reset the handler after it has been called.
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*/
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#define signal sigset
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#endif
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#ifdef HAVE_SIGPROCMASK
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#define block_sigs(a) { \
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sigset_t __new; \
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\
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sigfillset(&__new); \
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sigprocmask(SIG_BLOCK, &__new, &a);\
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}
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#define unblock_sig(s) { \
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sigset_t __new; \
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\
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sigemptyset(&__new); \
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sigaddset(&__new, (s)); \
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sigprocmask(SIG_UNBLOCK, &__new, NULL);\
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}
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#define restore_sigs(a) sigprocmask(SIG_SETMASK, &a, 0);
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#else /* !HAVE_SIGPROCMASK */
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#define sigset_t int
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#define block_sigs(a) a = sigblock(0xFFFFFFFF)
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#define restore_sigs(a) sigsetmask(a);
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#define unblock_sig(s) { \
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int __old, __new; \
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\
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block_sigs(__old); \
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__new = sigmask(s); \
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__new = __old & ~__new; \
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sigsetmask(__new); \
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}
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#endif /* HAVE_SIGPROCMASK */
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#endif /* _SIGDEFS_H */
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