diff options
Diffstat (limited to 'gnu/signal.in.h')
| -rwxr-xr-x | gnu/signal.in.h | 249 |
1 files changed, 249 insertions, 0 deletions
diff --git a/gnu/signal.in.h b/gnu/signal.in.h new file mode 100755 index 00000000..131132ab --- /dev/null +++ b/gnu/signal.in.h @@ -0,0 +1,249 @@ +/* A GNU-like <signal.h>. + + Copyright (C) 2006-2010 Free Software Foundation, Inc. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + 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. If not, see <http://www.gnu.org/licenses/>. */ + +#if __GNUC__ >= 3 +@PRAGMA_SYSTEM_HEADER@ +#endif + +#if defined __need_sig_atomic_t || defined __need_sigset_t +/* Special invocation convention inside glibc header files. */ + +# @INCLUDE_NEXT@ @NEXT_SIGNAL_H@ + +#else +/* Normal invocation convention. */ + +#ifndef _GL_SIGNAL_H + +/* The include_next requires a split double-inclusion guard. */ +#@INCLUDE_NEXT@ @NEXT_SIGNAL_H@ + +#ifndef _GL_SIGNAL_H +#define _GL_SIGNAL_H + +/* The definition of _GL_ARG_NONNULL is copied here. */ + +/* The definition of _GL_WARN_ON_USE is copied here. */ + +/* Define pid_t, uid_t. + Also, mingw defines sigset_t not in <signal.h>, but in <sys/types.h>. */ +#include <sys/types.h> + +/* On AIX, sig_atomic_t already includes volatile. C99 requires that + 'volatile sig_atomic_t' ignore the extra modifier, but C89 did not. + Hence, redefine this to a non-volatile type as needed. */ +#if ! @HAVE_TYPE_VOLATILE_SIG_ATOMIC_T@ +typedef int rpl_sig_atomic_t; +# undef sig_atomic_t +# define sig_atomic_t rpl_sig_atomic_t +#endif + +/* A set or mask of signals. */ +#if !@HAVE_SIGSET_T@ +typedef unsigned int sigset_t; +#endif + +#ifdef __cplusplus +extern "C" { +#endif + + +#if @GNULIB_SIGNAL_H_SIGPIPE@ +# ifndef SIGPIPE +/* Define SIGPIPE to a value that does not overlap with other signals. */ +# define SIGPIPE 13 +# define GNULIB_defined_SIGPIPE 1 +/* To actually use SIGPIPE, you also need the gnulib modules 'sigprocmask', + 'write', 'stdio'. */ +# endif +#endif + + +#if @GNULIB_SIGPROCMASK@ +# if !@HAVE_POSIX_SIGNALBLOCKING@ + +/* Maximum signal number + 1. */ +# ifndef NSIG +# define NSIG 32 +# endif + +/* This code supports only 32 signals. */ +typedef int verify_NSIG_constraint[2 * (NSIG <= 32) - 1]; + +/* Test whether a given signal is contained in a signal set. */ +extern int sigismember (const sigset_t *set, int sig) _GL_ARG_NONNULL ((1)); + +/* Initialize a signal set to the empty set. */ +extern int sigemptyset (sigset_t *set) _GL_ARG_NONNULL ((1)); + +/* Add a signal to a signal set. */ +extern int sigaddset (sigset_t *set, int sig) _GL_ARG_NONNULL ((1)); + +/* Remove a signal from a signal set. */ +extern int sigdelset (sigset_t *set, int sig) _GL_ARG_NONNULL ((1)); + +/* Fill a signal set with all possible signals. */ +extern int sigfillset (sigset_t *set) _GL_ARG_NONNULL ((1)); + +/* Return the set of those blocked signals that are pending. */ +extern int sigpending (sigset_t *set) _GL_ARG_NONNULL ((1)); + +/* If OLD_SET is not NULL, put the current set of blocked signals in *OLD_SET. + Then, if SET is not NULL, affect the current set of blocked signals by + combining it with *SET as indicated in OPERATION. + In this implementation, you are not allowed to change a signal handler + while the signal is blocked. */ +# define SIG_BLOCK 0 /* blocked_set = blocked_set | *set; */ +# define SIG_SETMASK 1 /* blocked_set = *set; */ +# define SIG_UNBLOCK 2 /* blocked_set = blocked_set & ~*set; */ +extern int sigprocmask (int operation, const sigset_t *set, sigset_t *old_set); + +# define signal rpl_signal +/* Install the handler FUNC for signal SIG, and return the previous + handler. */ +extern void (*signal (int sig, void (*func) (int))) (int); + +# if GNULIB_defined_SIGPIPE + +/* Raise signal SIG. */ +# undef raise +# define raise rpl_raise +extern int raise (int sig); + +# endif + +# endif /* !@HAVE_POSIX_SIGNALBLOCKING@ */ +#elif defined GNULIB_POSIXCHECK +# undef sigaddset +# if HAVE_RAW_DECL_SIGADDSET +_GL_WARN_ON_USE (sigaddset, "sigaddset is unportable - " + "use the gnulib module sigprocmask for portability"); +# endif +# undef sigdelset +# if HAVE_RAW_DECL_SIGDELSET +_GL_WARN_ON_USE (sigdelset, "sigdelset is unportable - " + "use the gnulib module sigprocmask for portability"); +# endif +# undef sigemptyset +# if HAVE_RAW_DECL_SIGEMPTYSET +_GL_WARN_ON_USE (sigemptyset, "sigemptyset is unportable - " + "use the gnulib module sigprocmask for portability"); +# endif +# undef sigfillset +# if HAVE_RAW_DECL_SIGFILLSET +_GL_WARN_ON_USE (sigfillset, "sigfillset is unportable - " + "use the gnulib module sigprocmask for portability"); +# endif +# undef sigismember +# if HAVE_RAW_DECL_SIGISMEMBER +_GL_WARN_ON_USE (sigismember, "sigismember is unportable - " + "use the gnulib module sigprocmask for portability"); +# endif +# undef sigpending +# if HAVE_RAW_DECL_SIGPENDING +_GL_WARN_ON_USE (sigpending, "sigpending is unportable - " + "use the gnulib module sigprocmask for portability"); +# endif +# undef sigprocmask +# if HAVE_RAW_DECL_SIGPROCMASK +_GL_WARN_ON_USE (sigprocmask, "sigprocmask is unportable - " + "use the gnulib module sigprocmask for portability"); +# endif +#endif /* @GNULIB_SIGPROCMASK@ */ + + +#if @GNULIB_SIGACTION@ +# if !@HAVE_SIGACTION@ + +# if !@HAVE_SIGINFO_T@ +/* Present to allow compilation, but unsupported by gnulib. */ +union sigval +{ + int sival_int; + void *sival_ptr; +}; + +/* Present to allow compilation, but unsupported by gnulib. */ +struct siginfo_t +{ + int si_signo; + int si_code; + int si_errno; + pid_t si_pid; + uid_t si_uid; + void *si_addr; + int si_status; + long si_band; + union sigval si_value; +}; +typedef struct siginfo_t siginfo_t; +# endif /* !@HAVE_SIGINFO_T@ */ + +/* We assume that platforms which lack the sigaction() function also lack + the 'struct sigaction' type, and vice versa. */ + +struct sigaction +{ + union + { + void (*_sa_handler) (int); + /* Present to allow compilation, but unsupported by gnulib. POSIX + says that implementations may, but not must, make sa_sigaction + overlap with sa_handler, but we know of no implementation where + they do not overlap. */ + void (*_sa_sigaction) (int, siginfo_t *, void *); + } _sa_func; + sigset_t sa_mask; + /* Not all POSIX flags are supported. */ + int sa_flags; +}; +# define sa_handler _sa_func._sa_handler +# define sa_sigaction _sa_func._sa_sigaction +/* Unsupported flags are not present. */ +# define SA_RESETHAND 1 +# define SA_NODEFER 2 +# define SA_RESTART 4 + +extern int sigaction (int, const struct sigaction *restrict, + struct sigaction *restrict); + +# elif !@HAVE_STRUCT_SIGACTION_SA_SIGACTION@ + +# define sa_sigaction sa_handler + +# endif /* !@HAVE_SIGACTION@, !@HAVE_STRUCT_SIGACTION_SA_SIGACTION@ */ +#elif defined GNULIB_POSIXCHECK +# undef sigaction +# if HAVE_RAW_DECL_SIGACTION +_GL_WARN_ON_USE (sigaction, "sigaction is unportable - " + "use the gnulib module sigaction for portability"); +# endif +#endif + +/* Some systems don't have SA_NODEFER. */ +#ifndef SA_NODEFER +# define SA_NODEFER 0 +#endif + + +#ifdef __cplusplus +} +#endif + +#endif /* _GL_SIGNAL_H */ +#endif /* _GL_SIGNAL_H */ +#endif |