(Program Modes): Replace inforef to emacs-xtra by conditional xref's, depending

[gnu-emacs] / src / syssignal.h

diff --git a/src/syssignal.h b/src/syssignal.h
index 08b989c8f13334d90b68b8a44dc88db1ee3ef858..cc2212d5e19e45776c5daef2ac8479a204a3efe9 100644 (file)
--- a/src/syssignal.h
+++ b/src/syssignal.h
@@ -1,5 +1,6 @@
 /* syssignal.h - System-dependent definitions for signals.
-   Copyright (C) 1993 Free Software Foundation, Inc.
+   Copyright (C) 1993, 1999, 2002, 2003, 2004,
+                 2005, 2006 Free Software Foundation, Inc.
 
 This file is part of GNU Emacs.
 
@@ -15,8 +16,15 @@ GNU General Public License for more details.
 
 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
 
@@ -49,7 +57,6 @@ extern sigset_t empty_mask, full_mask;
 extern sigset_t sys_sigmask ();
 #define sigmask(SIG) (sys_sigmask (SIG))
 #endif /* ! defined (__GNUC__) */
-#endif
 
 #undef sigpause
 #define sigpause(MASK)    sigsuspend (&(MASK))
@@ -68,31 +75,43 @@ extern sigset_t sys_sigmask ();
    appears to be assumed in the source, for example data.c:arith_error.  */
 typedef RETSIGTYPE (*signal_handler_t) (/*int*/);
 
-signal_handler_t sys_signal (/*int signal_number, signal_handler_t action*/);
-sigset_t sys_sigblock   (/*sigset_t new_mask*/);
-sigset_t sys_sigunblock (/*sigset_t new_mask*/);
-sigset_t sys_sigsetmask (/*sigset_t new_mask*/);
+signal_handler_t sys_signal P_ ((int signal_number, signal_handler_t action));
+sigset_t sys_sigblock   P_ ((sigset_t new_mask));
+sigset_t sys_sigunblock P_ ((sigset_t new_mask));
+sigset_t sys_sigsetmask P_ ((sigset_t new_mask));
 
 #define sys_sigdel(MASK,SIG) sigdelset (&MASK,SIG)
 
 #else /* ! defined (POSIX_SIGNALS) */
 #ifdef USG5_4
 
+extern SIGMASKTYPE sigprocmask_set;
+
 #ifndef sigblock
-#define sigblock(sig) (sigprocmask (SIG_BLOCK, SIGEMPTYMASK | sig, NULL))
+#define sigblock(sig)                                  \
+     (sigprocmask_set = SIGEMPTYMASK | (sig),          \
+      sigprocmask (SIG_BLOCK, &sigprocmask_set, NULL))
 #endif
 
-#define sigunblock(sig) (sigprocmask (SIG_SETMASK, SIGFULLMASK & ~(sig), NULL))
+#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) */
@@ -123,6 +142,39 @@ sigset_t sys_sigsetmask (/*sigset_t new_mask*/);
 #define sigfree() sigsetmask (SIGEMPTYMASK)
 #endif /* not BSD4_1 */
 
+#if defined (SIGINFO) && defined (BROKEN_SIGINFO)
+#undef SIGINFO
+#endif
+#if defined (SIGIO) && defined (BROKEN_SIGIO)
+# undef SIGIO
+# if defined (__Lynx__)
+# undef SIGPOLL /* Defined as SIGIO on LynxOS */
+# endif
+#endif
+#if defined (SIGPOLL) && defined (BROKEN_SIGPOLL)
+#undef SIGPOLL
+#endif
+#if defined (SIGTSTP) && defined (BROKEN_SIGTSTP)
+#undef SIGTSTP
+#endif
+#if defined (SIGURG) && defined (BROKEN_SIGURG)
+#undef SIGURG
+#endif
+#if defined (SIGAIO) && defined (BROKEN_SIGAIO)
+#undef SIGAIO
+#endif
+#if defined (SIGPTY) && defined (BROKEN_SIGPTY)
+#undef SIGPTY
+#endif
+
+
+#if NSIG < NSIG_MINIMUM
+# ifdef NSIG
+#  undef NSIG
+# endif
+# define NSIG NSIG_MINIMUM
+#endif
+
 #ifdef BSD4_1
 #define SIGIO SIGTINT
 /* sigfree is in sysdep.c */
@@ -149,3 +201,33 @@ sigset_t sys_sigsetmask (/*sigset_t new_mask*/);
 #endif /* SIGCHLD */
 #endif /* ! defined (SIGCLD) */
 #endif /* VMS */
+
+#ifndef HAVE_STRSIGNAL
+/* strsignal is in sysdep.c */
+char *strsignal ();
+#endif
+
+#ifdef HAVE_GTK_AND_PTHREAD
+#define SIGNAL_THREAD_CHECK(signo)                                      \
+  do {                                                                  \
+    if (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) */