trunk/include/sigdefs.h

/* @(#)sigdefs.h        1.5 02/01/19 Copyright 1997 J. Schilling */
/*
 *      Signal abstraction for BSD/SVR4 signals
 *
 *      Copyright (c) 1997 J. Schilling
 */
/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; see the file COPYING.  If not, write to the Free Software
 * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#ifndef _SIGDEFS_H
#define _SIGDEFS_H

#ifndef _MCONFIG_H
#include <mconfig.h>
#endif

#ifdef  HAVE_SIGSET
/*
 * Try to by default use the function that sets up signal handlers in a way
 * that does not reset the handler after it has been called.
 */
#define signal          sigset
#endif

#ifdef  HAVE_SIGPROCMASK
#define block_sigs(a)   { \
                                sigset_t        __new;  \
                                                        \
                                sigfillset(&__new);     \
                                sigprocmask(SIG_BLOCK, &__new, &a);\
                        }
#define unblock_sig(s)  { \
                                sigset_t        __new;  \
                                                        \
                                sigemptyset(&__new);    \
                                sigaddset(&__new, (s)); \
                                sigprocmask(SIG_UNBLOCK, &__new, NULL);\
                        }
#define restore_sigs(a) sigprocmask(SIG_SETMASK, &a, 0);

#else   /* !HAVE_SIGPROCMASK */

#define sigset_t        int
#define block_sigs(a)   a = sigblock(0xFFFFFFFF)
#define restore_sigs(a) sigsetmask(a);
#define unblock_sig(s)  { \
                                int     __old, __new;   \
                                                        \
                                block_sigs(__old);      \
                                __new = sigmask(s);     \
                                __new = __old & ~__new; \
                                sigsetmask(__new);      \
                        }

#endif  /* HAVE_SIGPROCMASK */

#endif  /* _SIGDEFS_H */
1	/* @(#)sigdefs.h 1.5 02/01/19 Copyright 1997 J. Schilling */
2	/*
3	* Signal abstraction for BSD/SVR4 signals
4	*
5	* Copyright (c) 1997 J. Schilling
6	*/
7	/*
8	* This program is free software; you can redistribute it and/or modify
9	* it under the terms of the GNU General Public License version 2
10	* as published by the Free Software Foundation.
11	*
12	* This program is distributed in the hope that it will be useful,
13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15	* GNU General Public License for more details.
16	*
17	* You should have received a copy of the GNU General Public License along with
18	* this program; see the file COPYING. If not, write to the Free Software
19	* Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20	*/
21
22	#ifndef _SIGDEFS_H
23	#define _SIGDEFS_H
24
25	#ifndef _MCONFIG_H
26	#include <mconfig.h>
27	#endif
28
29	#ifdef HAVE_SIGSET
30	/*
31	* Try to by default use the function that sets up signal handlers in a way
32	* that does not reset the handler after it has been called.
33	*/
34	#define signal sigset
35	#endif
36
37	#ifdef HAVE_SIGPROCMASK
38	#define block_sigs(a) { \
39	sigset_t __new; \
40	\
41	sigfillset(&__new); \
42	sigprocmask(SIG_BLOCK, &__new, &a);\
43	}
44	#define unblock_sig(s) { \
45	sigset_t __new; \
46	\
47	sigemptyset(&__new); \
48	sigaddset(&__new, (s)); \
49	sigprocmask(SIG_UNBLOCK, &__new, NULL);\
50	}
51	#define restore_sigs(a) sigprocmask(SIG_SETMASK, &a, 0);
52
53	#else /* !HAVE_SIGPROCMASK */
54
55	#define sigset_t int
56	#define block_sigs(a) a = sigblock(0xFFFFFFFF)
57	#define restore_sigs(a) sigsetmask(a);
58	#define unblock_sig(s) { \
59	int __old, __new; \
60	\
61	block_sigs(__old); \
62	__new = sigmask(s); \
63	__new = __old & ~__new; \
64	sigsetmask(__new); \
65	}
66
67	#endif /* HAVE_SIGPROCMASK */
68
69	#endif /* _SIGDEFS_H */