#ifndef _GL_SIGNAL_H
#define _GL_SIGNAL_H
-/* The definition of GL_LINK_WARNING is copied here. */
+/* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
/* 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>
typedef unsigned int sigset_t;
#endif
-#ifdef __cplusplus
-extern "C" {
-#endif
-
#if @GNULIB_SIGNAL_H_SIGPIPE@
# ifndef SIGPIPE
/* This code supports only 32 signals. */
typedef int verify_NSIG_constraint[2 * (NSIG <= 32) - 1];
+# endif
+
/* Test whether a given signal is contained in a signal set. */
-extern int sigismember (const sigset_t *set, int sig) _GL_ARG_NONNULL ((1));
+# if @HAVE_POSIX_SIGNALBLOCKING@
+/* This function is defined as a macro on MacOS X. */
+# if defined __cplusplus && defined GNULIB_NAMESPACE
+# undef sigismember
+# endif
+# else
+_GL_FUNCDECL_SYS (sigismember, int, (const sigset_t *set, int sig)
+ _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIAS_SYS (sigismember, int, (const sigset_t *set, int sig));
+_GL_CXXALIASWARN (sigismember);
/* Initialize a signal set to the empty set. */
-extern int sigemptyset (sigset_t *set) _GL_ARG_NONNULL ((1));
+# if @HAVE_POSIX_SIGNALBLOCKING@
+/* This function is defined as a macro on MacOS X. */
+# if defined __cplusplus && defined GNULIB_NAMESPACE
+# undef sigemptyset
+# endif
+# else
+_GL_FUNCDECL_SYS (sigemptyset, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIAS_SYS (sigemptyset, int, (sigset_t *set));
+_GL_CXXALIASWARN (sigemptyset);
/* Add a signal to a signal set. */
-extern int sigaddset (sigset_t *set, int sig) _GL_ARG_NONNULL ((1));
+# if @HAVE_POSIX_SIGNALBLOCKING@
+/* This function is defined as a macro on MacOS X. */
+# if defined __cplusplus && defined GNULIB_NAMESPACE
+# undef sigaddset
+# endif
+# else
+_GL_FUNCDECL_SYS (sigaddset, int, (sigset_t *set, int sig)
+ _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIAS_SYS (sigaddset, int, (sigset_t *set, int sig));
+_GL_CXXALIASWARN (sigaddset);
/* Remove a signal from a signal set. */
-extern int sigdelset (sigset_t *set, int sig) _GL_ARG_NONNULL ((1));
+# if @HAVE_POSIX_SIGNALBLOCKING@
+/* This function is defined as a macro on MacOS X. */
+# if defined __cplusplus && defined GNULIB_NAMESPACE
+# undef sigdelset
+# endif
+# else
+_GL_FUNCDECL_SYS (sigdelset, int, (sigset_t *set, int sig)
+ _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIAS_SYS (sigdelset, int, (sigset_t *set, int sig));
+_GL_CXXALIASWARN (sigdelset);
/* Fill a signal set with all possible signals. */
-extern int sigfillset (sigset_t *set) _GL_ARG_NONNULL ((1));
+# if @HAVE_POSIX_SIGNALBLOCKING@
+/* This function is defined as a macro on MacOS X. */
+# if defined __cplusplus && defined GNULIB_NAMESPACE
+# undef sigfillset
+# endif
+# else
+_GL_FUNCDECL_SYS (sigfillset, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIAS_SYS (sigfillset, int, (sigset_t *set));
+_GL_CXXALIASWARN (sigfillset);
/* Return the set of those blocked signals that are pending. */
-extern int sigpending (sigset_t *set) _GL_ARG_NONNULL ((1));
+# if !@HAVE_POSIX_SIGNALBLOCKING@
+_GL_FUNCDECL_SYS (sigpending, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
+# endif
+_GL_CXXALIAS_SYS (sigpending, int, (sigset_t *set));
+_GL_CXXALIASWARN (sigpending);
/* 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. */
+# if !@HAVE_POSIX_SIGNALBLOCKING@
# 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);
+_GL_FUNCDECL_SYS (sigprocmask, int,
+ (int operation, const sigset_t *set, sigset_t *old_set));
+# endif
+_GL_CXXALIAS_SYS (sigprocmask, int,
+ (int operation, const sigset_t *set, sigset_t *old_set));
+_GL_CXXALIASWARN (sigprocmask);
-# 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
+# ifdef __cplusplus
+extern "C" {
+# endif
+typedef void (*_gl_function_taking_int_returning_void_t) (int);
+# ifdef __cplusplus
+}
+# endif
+# if !@HAVE_POSIX_SIGNALBLOCKING@
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# define signal rpl_signal
+# endif
+_GL_FUNCDECL_RPL (signal, _gl_function_taking_int_returning_void_t,
+ (int sig, _gl_function_taking_int_returning_void_t func));
+_GL_CXXALIAS_RPL (signal, _gl_function_taking_int_returning_void_t,
+ (int sig, _gl_function_taking_int_returning_void_t func));
+# else
+_GL_CXXALIAS_SYS (signal, _gl_function_taking_int_returning_void_t,
+ (int sig, _gl_function_taking_int_returning_void_t func));
+# endif
+_GL_CXXALIASWARN (signal);
/* Raise signal SIG. */
+# if !@HAVE_POSIX_SIGNALBLOCKING@ && GNULIB_defined_SIGPIPE
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
# undef raise
# define raise rpl_raise
-extern int raise (int sig);
-
# endif
+_GL_FUNCDECL_RPL (raise, int, (int sig));
+_GL_CXXALIAS_RPL (raise, int, (int sig));
+# else
+_GL_CXXALIAS_SYS (raise, int, (int sig));
+# endif
+_GL_CXXALIASWARN (raise);
-# endif /* !@HAVE_POSIX_SIGNALBLOCKING@ */
#elif defined GNULIB_POSIXCHECK
# undef sigaddset
-# define sigaddset(s,n) \
- (GL_LINK_WARNING ("sigaddset is unportable - " \
- "use gnulib module sigprocmask for portability"), \
- sigaddset (s, n))
+# if HAVE_RAW_DECL_SIGADDSET
+_GL_WARN_ON_USE (sigaddset, "sigaddset is unportable - "
+ "use the gnulib module sigprocmask for portability");
+# endif
# undef sigdelset
-# define sigdelset(s,n) \
- (GL_LINK_WARNING ("sigdelset is unportable - " \
- "use gnulib module sigprocmask for portability"), \
- sigdelset (s, n))
+# if HAVE_RAW_DECL_SIGDELSET
+_GL_WARN_ON_USE (sigdelset, "sigdelset is unportable - "
+ "use the gnulib module sigprocmask for portability");
+# endif
# undef sigemptyset
-# define sigemptyset(s) \
- (GL_LINK_WARNING ("sigemptyset is unportable - " \
- "use gnulib module sigprocmask for portability"), \
- sigemptyset (s))
+# if HAVE_RAW_DECL_SIGEMPTYSET
+_GL_WARN_ON_USE (sigemptyset, "sigemptyset is unportable - "
+ "use the gnulib module sigprocmask for portability");
+# endif
# undef sigfillset
-# define sigfillset(s) \
- (GL_LINK_WARNING ("sigfillset is unportable - " \
- "use gnulib module sigprocmask for portability"), \
- sigfillset (s))
+# if HAVE_RAW_DECL_SIGFILLSET
+_GL_WARN_ON_USE (sigfillset, "sigfillset is unportable - "
+ "use the gnulib module sigprocmask for portability");
+# endif
# undef sigismember
-# define sigismember(s,n) \
- (GL_LINK_WARNING ("sigismember is unportable - " \
- "use gnulib module sigprocmask for portability"), \
- sigismember (s, n))
+# if HAVE_RAW_DECL_SIGISMEMBER
+_GL_WARN_ON_USE (sigismember, "sigismember is unportable - "
+ "use the gnulib module sigprocmask for portability");
+# endif
# undef sigpending
-# define sigpending(s) \
- (GL_LINK_WARNING ("sigpending is unportable - " \
- "use gnulib module sigprocmask for portability"), \
- sigpending (s))
+# if HAVE_RAW_DECL_SIGPENDING
+_GL_WARN_ON_USE (sigpending, "sigpending is unportable - "
+ "use the gnulib module sigprocmask for portability");
+# endif
# undef sigprocmask
-# define sigprocmask(h,s,o) \
- (GL_LINK_WARNING ("sigprocmask is unportable - " \
- "use gnulib module sigprocmask for portability"), \
- sigprocmask (h, s, o))
+# if HAVE_RAW_DECL_SIGPROCMASK
+_GL_WARN_ON_USE (sigprocmask, "sigprocmask is unportable - "
+ "use the gnulib module sigprocmask for portability");
+# endif
#endif /* @GNULIB_SIGPROCMASK@ */
# define SA_NODEFER 2
# define SA_RESTART 4
-extern int sigaction (int, const struct sigaction *restrict,
- struct sigaction *restrict);
+_GL_FUNCDECL_SYS (sigaction, int, (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@ */
+
+_GL_CXXALIAS_SYS (sigaction, int, (int, const struct sigaction *restrict,
+ struct sigaction *restrict));
+_GL_CXXALIASWARN (sigaction);
+
#elif defined GNULIB_POSIXCHECK
# undef sigaction
-# define sigaction(s,a,o) \
- (GL_LINK_WARNING ("sigaction is unportable - " \
- "use gnulib module sigaction for portability"), \
- sigaction (s, a, o))
+# 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. */
#endif
-#ifdef __cplusplus
-}
-#endif
-
#endif /* _GL_SIGNAL_H */
#endif /* _GL_SIGNAL_H */
#endif
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