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-rw-r--r--gcc-4.8.3/gcc/ada/ctrl_c.c166
1 files changed, 166 insertions, 0 deletions
diff --git a/gcc-4.8.3/gcc/ada/ctrl_c.c b/gcc-4.8.3/gcc/ada/ctrl_c.c
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+++ b/gcc-4.8.3/gcc/ada/ctrl_c.c
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+/****************************************************************************
+ * *
+ * GNAT COMPILER COMPONENTS *
+ * *
+ * C T R L _ C *
+ * *
+ * C Implementation File *
+ * *
+ * Copyright (C) 2002-2009, Free Software Foundation, Inc. *
+ * *
+ * GNAT is free software; you can redistribute it and/or modify it under *
+ * terms of the GNU General Public License as published by the Free Soft- *
+ * ware Foundation; either version 3, or (at your option) any later ver- *
+ * sion. GNAT is distributed in the hope that it will be useful, but WITH- *
+ * OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY *
+ * or FITNESS FOR A PARTICULAR PURPOSE. *
+ * *
+ * As a special exception under Section 7 of GPL version 3, you are granted *
+ * additional permissions described in the GCC Runtime Library Exception, *
+ * version 3.1, as published by the Free Software Foundation. *
+ * *
+ * You should have received a copy of the GNU General Public License and *
+ * a copy of the GCC Runtime Library Exception along with this program; *
+ * see the files COPYING3 and COPYING.RUNTIME respectively. If not, see *
+ * <http://www.gnu.org/licenses/>. *
+ * *
+ * GNAT was originally developed by the GNAT team at New York University. *
+ * Extensive contributions were provided by Ada Core Technologies Inc. *
+ * *
+ ****************************************************************************/
+
+#ifdef IN_RTS
+#include "tconfig.h"
+#include "tsystem.h"
+#include <sys/stat.h>
+#else
+#include "config.h"
+#include "system.h"
+#endif
+
+/* Services to intercept Ctrl-C */
+
+/* __gnat_install_int_handler will install the specified handler.
+ If called for the first time, it will also save the original handler */
+void __gnat_install_int_handler (void (*) (void));
+
+/* __gnat_uninstall_int_handler will reinstall the original handler */
+void __gnat_uninstall_int_handler (void);
+
+/* POSIX implementation */
+
+#if (defined (__unix__) || defined (_AIX) || defined (__APPLE__)) \
+ && !defined (__vxworks)
+
+#include <signal.h>
+
+void (*sigint_intercepted) (void) = 0;
+
+struct sigaction original_act;
+
+static void
+__gnat_int_handler (int sig __attribute__ ((unused)))
+{
+ if (sigint_intercepted != 0)
+ sigint_intercepted ();
+}
+
+/* Install handler and save original handler. */
+
+void
+__gnat_install_int_handler (void (*proc) (void))
+{
+ struct sigaction act;
+
+ if (sigint_intercepted == 0)
+ {
+ act.sa_handler = __gnat_int_handler;
+#if defined (__Lynx__)
+ /* LynxOS does not support SA_RESTART. */
+ act.sa_flags = 0;
+#else
+ act.sa_flags = SA_RESTART;
+#endif
+ sigemptyset (&act.sa_mask);
+ sigaction (SIGINT, &act, &original_act);
+ }
+
+ sigint_intercepted = proc;
+}
+
+/* Restore original handler */
+
+void
+__gnat_uninstall_int_handler (void)
+{
+ if (sigint_intercepted != 0)
+ {
+ sigaction (SIGINT, &original_act, 0);
+ sigint_intercepted = 0;
+ }
+}
+
+/* Windows implementation */
+
+#elif defined (__MINGW32__)
+
+#include "mingw32.h"
+#include <windows.h>
+
+void (*sigint_intercepted) (void) = NULL;
+
+static BOOL WINAPI
+__gnat_int_handler (DWORD dwCtrlType)
+{
+ switch (dwCtrlType)
+ {
+ case CTRL_C_EVENT:
+ case CTRL_BREAK_EVENT:
+ if (sigint_intercepted != 0)
+ {
+ sigint_intercepted ();
+ return TRUE;
+ }
+ break;
+
+ case CTRL_CLOSE_EVENT:
+ case CTRL_LOGOFF_EVENT:
+ case CTRL_SHUTDOWN_EVENT:
+ break;
+ }
+
+ return FALSE;
+}
+
+void
+__gnat_install_int_handler (void (*proc) (void))
+{
+ if (sigint_intercepted == NULL)
+ SetConsoleCtrlHandler (__gnat_int_handler, TRUE);
+
+ sigint_intercepted = proc;
+}
+
+void
+__gnat_uninstall_int_handler (void)
+{
+ if (sigint_intercepted != NULL)
+ SetConsoleCtrlHandler (__gnat_int_handler, FALSE);
+
+ sigint_intercepted = NULL;
+}
+
+/* Default implementation: do nothing */
+
+#else
+
+void
+__gnat_install_int_handler (void (*proc) (void) __attribute__ ((unused)))
+{
+}
+
+void
+__gnat_uninstall_int_handler (void)
+{
+}
+#endif