source: trunk/src/sed/gnulib-tests/signal.in.h@ 3613

Last change on this file since 3613 was 3611, checked in by bird, 10 months ago

vendor/sed/current: GNU sed 4.9 (sed-4.9.tar.xz sha256:6e226b732e1cd739464ad6862bd1a1aba42d7982922da7a53519631d24975181)
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1/* A GNU-like <signal.h>.
2
3 Copyright (C) 2006-2022 Free Software Foundation, Inc.
4
5 This file is free software: you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as
7 published by the Free Software Foundation; either version 2.1 of the
8 License, or (at your option) any later version.
9
10 This file is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public License
16 along with this program. If not, see <https://www.gnu.org/licenses/>. */
17
18#if __GNUC__ >= 3
19@PRAGMA_SYSTEM_HEADER@
20#endif
21@PRAGMA_COLUMNS@
22
23#if defined __need_sig_atomic_t || defined __need_sigset_t || defined _GL_ALREADY_INCLUDING_SIGNAL_H || (defined _SIGNAL_H && !defined __SIZEOF_PTHREAD_MUTEX_T)
24/* Special invocation convention:
25 - Inside glibc header files.
26 - On glibc systems we have a sequence of nested includes
27 <signal.h> -> <ucontext.h> -> <signal.h>.
28 In this situation, the functions are not yet declared, therefore we cannot
29 provide the C++ aliases.
30 - On glibc systems with GCC 4.3 we have a sequence of nested includes
31 <csignal> -> </usr/include/signal.h> -> <sys/ucontext.h> -> <signal.h>.
32 In this situation, some of the functions are not yet declared, therefore
33 we cannot provide the C++ aliases. */
34
35# @INCLUDE_NEXT@ @NEXT_SIGNAL_H@
36
37#else
38/* Normal invocation convention. */
39
40#ifndef _@GUARD_PREFIX@_SIGNAL_H
41
42#define _GL_ALREADY_INCLUDING_SIGNAL_H
43
44/* Define pid_t, uid_t.
45 Also, mingw defines sigset_t not in <signal.h>, but in <sys/types.h>.
46 On Solaris 10, <signal.h> includes <sys/types.h>, which eventually includes
47 us; so include <sys/types.h> now, before the second inclusion guard. */
48#include <sys/types.h>
49
50/* The include_next requires a split double-inclusion guard. */
51#@INCLUDE_NEXT@ @NEXT_SIGNAL_H@
52
53#undef _GL_ALREADY_INCLUDING_SIGNAL_H
54
55#ifndef _@GUARD_PREFIX@_SIGNAL_H
56#define _@GUARD_PREFIX@_SIGNAL_H
57
58/* For testing the OpenBSD version. */
59#if (@GNULIB_PTHREAD_SIGMASK@ || defined GNULIB_POSIXCHECK) \
60 && defined __OpenBSD__
61# include <sys/param.h>
62#endif
63
64/* Mac OS X 10.3, FreeBSD < 8.0, OpenBSD < 5.1, OSF/1 4.0, Solaris 2.6, Android,
65 OS/2 kLIBC declare pthread_sigmask in <pthread.h>, not in <signal.h>.
66 But avoid namespace pollution on glibc systems.*/
67#if (@GNULIB_PTHREAD_SIGMASK@ || defined GNULIB_POSIXCHECK) \
68 && ((defined __APPLE__ && defined __MACH__) \
69 || (defined __FreeBSD__ && __FreeBSD__ < 8) \
70 || (defined __OpenBSD__ && OpenBSD < 201205) \
71 || defined __osf__ || defined __sun || defined __ANDROID__ \
72 || defined __KLIBC__) \
73 && ! defined __GLIBC__
74# include <pthread.h>
75#endif
76
77/* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
78
79/* The definition of _GL_ARG_NONNULL is copied here. */
80
81/* The definition of _GL_WARN_ON_USE is copied here. */
82
83/* On AIX, sig_atomic_t already includes volatile. C99 requires that
84 'volatile sig_atomic_t' ignore the extra modifier, but C89 did not.
85 Hence, redefine this to a non-volatile type as needed. */
86#if ! @HAVE_TYPE_VOLATILE_SIG_ATOMIC_T@
87# if !GNULIB_defined_sig_atomic_t
88typedef int rpl_sig_atomic_t;
89# undef sig_atomic_t
90# define sig_atomic_t rpl_sig_atomic_t
91# define GNULIB_defined_sig_atomic_t 1
92# endif
93#endif
94
95/* A set or mask of signals. */
96#if !@HAVE_SIGSET_T@
97# if !GNULIB_defined_sigset_t
98typedef unsigned int sigset_t;
99# define GNULIB_defined_sigset_t 1
100# endif
101#endif
102
103/* Define sighandler_t, the type of signal handlers. A GNU extension. */
104#if !@HAVE_SIGHANDLER_T@
105# ifdef __cplusplus
106extern "C" {
107# endif
108# if !GNULIB_defined_sighandler_t
109typedef void (*sighandler_t) (int);
110# define GNULIB_defined_sighandler_t 1
111# endif
112# ifdef __cplusplus
113}
114# endif
115#endif
116
117
118#if @GNULIB_SIGNAL_H_SIGPIPE@
119# ifndef SIGPIPE
120/* Define SIGPIPE to a value that does not overlap with other signals. */
121# define SIGPIPE 13
122# define GNULIB_defined_SIGPIPE 1
123/* To actually use SIGPIPE, you also need the gnulib modules 'sigprocmask',
124 'write', 'stdio'. */
125# endif
126#endif
127
128
129/* Maximum signal number + 1. */
130#ifndef NSIG
131# if defined __TANDEM
132# define NSIG 32
133# endif
134#endif
135
136
137#if @GNULIB_PTHREAD_SIGMASK@
138# if @REPLACE_PTHREAD_SIGMASK@
139# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
140# undef pthread_sigmask
141# define pthread_sigmask rpl_pthread_sigmask
142# endif
143_GL_FUNCDECL_RPL (pthread_sigmask, int,
144 (int how,
145 const sigset_t *restrict new_mask,
146 sigset_t *restrict old_mask));
147_GL_CXXALIAS_RPL (pthread_sigmask, int,
148 (int how,
149 const sigset_t *restrict new_mask,
150 sigset_t *restrict old_mask));
151# else
152# if !(@HAVE_PTHREAD_SIGMASK@ || defined pthread_sigmask)
153_GL_FUNCDECL_SYS (pthread_sigmask, int,
154 (int how,
155 const sigset_t *restrict new_mask,
156 sigset_t *restrict old_mask));
157# endif
158_GL_CXXALIAS_SYS (pthread_sigmask, int,
159 (int how,
160 const sigset_t *restrict new_mask,
161 sigset_t *restrict old_mask));
162# endif
163# if __GLIBC__ >= 2
164_GL_CXXALIASWARN (pthread_sigmask);
165# endif
166#elif defined GNULIB_POSIXCHECK
167# undef pthread_sigmask
168# if HAVE_RAW_DECL_PTHREAD_SIGMASK
169_GL_WARN_ON_USE (pthread_sigmask, "pthread_sigmask is not portable - "
170 "use gnulib module pthread_sigmask for portability");
171# endif
172#endif
173
174
175#if @GNULIB_RAISE@
176# if @REPLACE_RAISE@
177# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
178# undef raise
179# define raise rpl_raise
180# endif
181_GL_FUNCDECL_RPL (raise, int, (int sig));
182_GL_CXXALIAS_RPL (raise, int, (int sig));
183# else
184# if !@HAVE_RAISE@
185_GL_FUNCDECL_SYS (raise, int, (int sig));
186# endif
187_GL_CXXALIAS_SYS (raise, int, (int sig));
188# endif
189# if __GLIBC__ >= 2
190_GL_CXXALIASWARN (raise);
191# endif
192#elif defined GNULIB_POSIXCHECK
193# undef raise
194/* Assume raise is always declared. */
195_GL_WARN_ON_USE (raise, "raise can crash on native Windows - "
196 "use gnulib module raise for portability");
197#endif
198
199
200#if @GNULIB_SIGPROCMASK@
201# if !@HAVE_POSIX_SIGNALBLOCKING@
202
203# ifndef GNULIB_defined_signal_blocking
204# define GNULIB_defined_signal_blocking 1
205# endif
206
207/* Maximum signal number + 1. */
208# ifndef NSIG
209# define NSIG 32
210# endif
211
212/* This code supports only 32 signals. */
213# if !GNULIB_defined_verify_NSIG_constraint
214typedef int verify_NSIG_constraint[NSIG <= 32 ? 1 : -1];
215# define GNULIB_defined_verify_NSIG_constraint 1
216# endif
217
218# endif
219
220/* When also using extern inline, suppress the use of static inline in
221 standard headers of problematic Apple configurations, as Libc at
222 least through Libc-825.26 (2013-04-09) mishandles it; see, e.g.,
223 <https://lists.gnu.org/r/bug-gnulib/2012-12/msg00023.html>.
224 Perhaps Apple will fix this some day. */
225#if (defined _GL_EXTERN_INLINE_IN_USE && defined __APPLE__ \
226 && (defined __i386__ || defined __x86_64__))
227# undef sigaddset
228# undef sigdelset
229# undef sigemptyset
230# undef sigfillset
231# undef sigismember
232#endif
233
234/* Test whether a given signal is contained in a signal set. */
235# if @HAVE_POSIX_SIGNALBLOCKING@
236/* This function is defined as a macro on Mac OS X. */
237# if defined __cplusplus && defined GNULIB_NAMESPACE
238# undef sigismember
239# endif
240# else
241_GL_FUNCDECL_SYS (sigismember, int, (const sigset_t *set, int sig)
242 _GL_ARG_NONNULL ((1)));
243# endif
244_GL_CXXALIAS_SYS (sigismember, int, (const sigset_t *set, int sig));
245_GL_CXXALIASWARN (sigismember);
246
247/* Initialize a signal set to the empty set. */
248# if @HAVE_POSIX_SIGNALBLOCKING@
249/* This function is defined as a macro on Mac OS X. */
250# if defined __cplusplus && defined GNULIB_NAMESPACE
251# undef sigemptyset
252# endif
253# else
254_GL_FUNCDECL_SYS (sigemptyset, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
255# endif
256_GL_CXXALIAS_SYS (sigemptyset, int, (sigset_t *set));
257_GL_CXXALIASWARN (sigemptyset);
258
259/* Add a signal to a signal set. */
260# if @HAVE_POSIX_SIGNALBLOCKING@
261/* This function is defined as a macro on Mac OS X. */
262# if defined __cplusplus && defined GNULIB_NAMESPACE
263# undef sigaddset
264# endif
265# else
266_GL_FUNCDECL_SYS (sigaddset, int, (sigset_t *set, int sig)
267 _GL_ARG_NONNULL ((1)));
268# endif
269_GL_CXXALIAS_SYS (sigaddset, int, (sigset_t *set, int sig));
270_GL_CXXALIASWARN (sigaddset);
271
272/* Remove a signal from a signal set. */
273# if @HAVE_POSIX_SIGNALBLOCKING@
274/* This function is defined as a macro on Mac OS X. */
275# if defined __cplusplus && defined GNULIB_NAMESPACE
276# undef sigdelset
277# endif
278# else
279_GL_FUNCDECL_SYS (sigdelset, int, (sigset_t *set, int sig)
280 _GL_ARG_NONNULL ((1)));
281# endif
282_GL_CXXALIAS_SYS (sigdelset, int, (sigset_t *set, int sig));
283_GL_CXXALIASWARN (sigdelset);
284
285/* Fill a signal set with all possible signals. */
286# if @HAVE_POSIX_SIGNALBLOCKING@
287/* This function is defined as a macro on Mac OS X. */
288# if defined __cplusplus && defined GNULIB_NAMESPACE
289# undef sigfillset
290# endif
291# else
292_GL_FUNCDECL_SYS (sigfillset, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
293# endif
294_GL_CXXALIAS_SYS (sigfillset, int, (sigset_t *set));
295_GL_CXXALIASWARN (sigfillset);
296
297/* Return the set of those blocked signals that are pending. */
298# if !@HAVE_POSIX_SIGNALBLOCKING@
299_GL_FUNCDECL_SYS (sigpending, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
300# endif
301_GL_CXXALIAS_SYS (sigpending, int, (sigset_t *set));
302_GL_CXXALIASWARN (sigpending);
303
304/* If OLD_SET is not NULL, put the current set of blocked signals in *OLD_SET.
305 Then, if SET is not NULL, affect the current set of blocked signals by
306 combining it with *SET as indicated in OPERATION.
307 In this implementation, you are not allowed to change a signal handler
308 while the signal is blocked. */
309# if !@HAVE_POSIX_SIGNALBLOCKING@
310# define SIG_BLOCK 0 /* blocked_set = blocked_set | *set; */
311# define SIG_SETMASK 1 /* blocked_set = *set; */
312# define SIG_UNBLOCK 2 /* blocked_set = blocked_set & ~*set; */
313_GL_FUNCDECL_SYS (sigprocmask, int,
314 (int operation,
315 const sigset_t *restrict set,
316 sigset_t *restrict old_set));
317# endif
318_GL_CXXALIAS_SYS (sigprocmask, int,
319 (int operation,
320 const sigset_t *restrict set,
321 sigset_t *restrict old_set));
322_GL_CXXALIASWARN (sigprocmask);
323
324/* Install the handler FUNC for signal SIG, and return the previous
325 handler. */
326# ifdef __cplusplus
327extern "C" {
328# endif
329# if !GNULIB_defined_function_taking_int_returning_void_t
330typedef void (*_gl_function_taking_int_returning_void_t) (int);
331# define GNULIB_defined_function_taking_int_returning_void_t 1
332# endif
333# ifdef __cplusplus
334}
335# endif
336# if !@HAVE_POSIX_SIGNALBLOCKING@
337# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
338# define signal rpl_signal
339# endif
340_GL_FUNCDECL_RPL (signal, _gl_function_taking_int_returning_void_t,
341 (int sig, _gl_function_taking_int_returning_void_t func));
342_GL_CXXALIAS_RPL (signal, _gl_function_taking_int_returning_void_t,
343 (int sig, _gl_function_taking_int_returning_void_t func));
344# else
345/* On OpenBSD, the declaration of 'signal' may not be present at this point,
346 because it occurs in <sys/signal.h>, not <signal.h> directly. */
347# if defined __OpenBSD__
348_GL_FUNCDECL_SYS (signal, _gl_function_taking_int_returning_void_t,
349 (int sig, _gl_function_taking_int_returning_void_t func));
350# endif
351_GL_CXXALIAS_SYS (signal, _gl_function_taking_int_returning_void_t,
352 (int sig, _gl_function_taking_int_returning_void_t func));
353# endif
354# if __GLIBC__ >= 2
355_GL_CXXALIASWARN (signal);
356# endif
357
358# if !@HAVE_POSIX_SIGNALBLOCKING@ && GNULIB_defined_SIGPIPE
359/* Raise signal SIGPIPE. */
360_GL_EXTERN_C int _gl_raise_SIGPIPE (void);
361# endif
362
363#elif defined GNULIB_POSIXCHECK
364# undef sigaddset
365# if HAVE_RAW_DECL_SIGADDSET
366_GL_WARN_ON_USE (sigaddset, "sigaddset is unportable - "
367 "use the gnulib module sigprocmask for portability");
368# endif
369# undef sigdelset
370# if HAVE_RAW_DECL_SIGDELSET
371_GL_WARN_ON_USE (sigdelset, "sigdelset is unportable - "
372 "use the gnulib module sigprocmask for portability");
373# endif
374# undef sigemptyset
375# if HAVE_RAW_DECL_SIGEMPTYSET
376_GL_WARN_ON_USE (sigemptyset, "sigemptyset is unportable - "
377 "use the gnulib module sigprocmask for portability");
378# endif
379# undef sigfillset
380# if HAVE_RAW_DECL_SIGFILLSET
381_GL_WARN_ON_USE (sigfillset, "sigfillset is unportable - "
382 "use the gnulib module sigprocmask for portability");
383# endif
384# undef sigismember
385# if HAVE_RAW_DECL_SIGISMEMBER
386_GL_WARN_ON_USE (sigismember, "sigismember is unportable - "
387 "use the gnulib module sigprocmask for portability");
388# endif
389# undef sigpending
390# if HAVE_RAW_DECL_SIGPENDING
391_GL_WARN_ON_USE (sigpending, "sigpending is unportable - "
392 "use the gnulib module sigprocmask for portability");
393# endif
394# undef sigprocmask
395# if HAVE_RAW_DECL_SIGPROCMASK
396_GL_WARN_ON_USE (sigprocmask, "sigprocmask is unportable - "
397 "use the gnulib module sigprocmask for portability");
398# endif
399#endif /* @GNULIB_SIGPROCMASK@ */
400
401
402#if @GNULIB_SIGACTION@
403# if !@HAVE_SIGACTION@
404
405# if !@HAVE_SIGINFO_T@
406
407# if !GNULIB_defined_siginfo_types
408
409/* Present to allow compilation, but unsupported by gnulib. */
410union sigval
411{
412 int sival_int;
413 void *sival_ptr;
414};
415
416/* Present to allow compilation, but unsupported by gnulib. */
417struct siginfo_t
418{
419 int si_signo;
420 int si_code;
421 int si_errno;
422 pid_t si_pid;
423 uid_t si_uid;
424 void *si_addr;
425 int si_status;
426 long si_band;
427 union sigval si_value;
428};
429typedef struct siginfo_t siginfo_t;
430
431# define GNULIB_defined_siginfo_types 1
432# endif
433
434# endif /* !@HAVE_SIGINFO_T@ */
435
436/* We assume that platforms which lack the sigaction() function also lack
437 the 'struct sigaction' type, and vice versa. */
438
439# if !GNULIB_defined_struct_sigaction
440
441struct sigaction
442{
443 union
444 {
445 void (*_sa_handler) (int);
446 /* Present to allow compilation, but unsupported by gnulib. POSIX
447 says that implementations may, but not must, make sa_sigaction
448 overlap with sa_handler, but we know of no implementation where
449 they do not overlap. */
450 void (*_sa_sigaction) (int, siginfo_t *, void *);
451 } _sa_func;
452 sigset_t sa_mask;
453 /* Not all POSIX flags are supported. */
454 int sa_flags;
455};
456# define sa_handler _sa_func._sa_handler
457# define sa_sigaction _sa_func._sa_sigaction
458/* Unsupported flags are not present. */
459# define SA_RESETHAND 1
460# define SA_NODEFER 2
461# define SA_RESTART 4
462
463# define GNULIB_defined_struct_sigaction 1
464# endif
465
466_GL_FUNCDECL_SYS (sigaction, int, (int, const struct sigaction *restrict,
467 struct sigaction *restrict));
468
469# elif !@HAVE_STRUCT_SIGACTION_SA_SIGACTION@
470
471# define sa_sigaction sa_handler
472
473# endif /* !@HAVE_SIGACTION@, !@HAVE_STRUCT_SIGACTION_SA_SIGACTION@ */
474
475_GL_CXXALIAS_SYS (sigaction, int, (int, const struct sigaction *restrict,
476 struct sigaction *restrict));
477_GL_CXXALIASWARN (sigaction);
478
479#elif defined GNULIB_POSIXCHECK
480# undef sigaction
481# if HAVE_RAW_DECL_SIGACTION
482_GL_WARN_ON_USE (sigaction, "sigaction is unportable - "
483 "use the gnulib module sigaction for portability");
484# endif
485#endif
486
487/* Some systems don't have SA_NODEFER. */
488#ifndef SA_NODEFER
489# define SA_NODEFER 0
490#endif
491
492
493#endif /* _@GUARD_PREFIX@_SIGNAL_H */
494#endif /* _@GUARD_PREFIX@_SIGNAL_H */
495#endif
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