/* syssignal.h - System-dependent definitions for signals.
- Copyright (C) 1993, 1999 Free Software Foundation, Inc.
+ Copyright (C) 1993, 1999, 2001, 2002, 2003, 2004,
+ 2005, 2006, 2007 Free Software Foundation, Inc.
This file is part of GNU Emacs.
You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING. If not, write to
-the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+Boston, MA 02110-1301, USA. */
+
+extern void init_signals P_ ((void));
+
+#ifdef HAVE_GTK_AND_PTHREAD
+#include <pthread.h>
+extern pthread_t main_thread;
+#endif
#ifdef POSIX_SIGNALS
#define SIGEMPTYMASK (empty_mask)
#define SIGFULLMASK (full_mask)
extern sigset_t empty_mask, full_mask;
-extern void init_signals P_ ((void));
/* POSIX pretty much destroys any possibility of writing sigmask as a
macro in standard C. We always define our own version because the
sigprocmask (SIG_BLOCK, &sigprocmask_set, NULL))
#endif
+#ifndef sigunblock
#define sigunblock(sig) \
(sigprocmask_set = SIGFULLMASK & ~(sig), \
sigprocmask (SIG_SETMASK, &sigprocmask_set, NULL))
+#endif
#else
#ifdef USG
-#define sigunblock(sig)
+#ifndef sigunblock
+#define sigunblock(sig)
+#endif
#else
+#ifndef sigunblock
#define sigunblock(SIG) \
{ SIGMASKTYPE omask = sigblock (SIGEMPTYMASK); sigsetmask (omask & ~SIG); }
+#endif
#endif /* ! defined (USG) */
#endif /* ! defined (USG5_4) */
#undef SIGINFO
#endif
#if defined (SIGIO) && defined (BROKEN_SIGIO)
-#undef SIGIO
+# undef SIGIO
+# if defined (__Lynx__)
+# undef SIGPOLL /* Defined as SIGIO on LynxOS */
+# endif
#endif
#if defined (SIGPOLL) && defined (BROKEN_SIGPOLL)
#undef SIGPOLL
/* strsignal is in sysdep.c */
char *strsignal ();
#endif
+
+#ifdef HAVE_GTK_AND_PTHREAD
+#define SIGNAL_THREAD_CHECK(signo) \
+ do { \
+ if (!pthread_equal (pthread_self (), main_thread)) \
+ { \
+ /* POSIX says any thread can receive the signal. On GNU/Linux \
+ that is not true, but for other systems (FreeBSD at least) \
+ it is. So direct the signal to the correct thread and block \
+ it from this thread. */ \
+ sigset_t new_mask; \
+ \
+ sigemptyset (&new_mask); \
+ sigaddset (&new_mask, signo); \
+ pthread_sigmask (SIG_BLOCK, &new_mask, 0); \
+ pthread_kill (main_thread, signo); \
+ return; \
+ } \
+ } while (0)
+
+#else /* not HAVE_GTK_AND_PTHREAD */
+#define SIGNAL_THREAD_CHECK(signo)
+#endif /* not HAVE_GTK_AND_PTHREAD */
+/* arch-tag: 4580e86a-340d-4574-9e11-a742b6e1a152
+ (do not change this comment) */