| /**************************************************************************** |
| * * |
| * GNAT COMPILER COMPONENTS * |
| * * |
| * C T R L _ C * |
| * * |
| * C Implementation File * |
| * * |
| * Copyright (C) 2002-2003, 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 2, 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. See the GNU General Public License * |
| * for more details. You should have received a copy of the GNU General * |
| * Public License distributed with GNAT; see file COPYING. If not, write * |
| * to the Free Software Foundation, 51 Franklin Street, Fifth Floor, * |
| * Boston, MA 02110-1301, USA. * |
| * * |
| * As a special exception, if you link this file with other files to * |
| * produce an executable, this file does not by itself cause the resulting * |
| * executable to be covered by the GNU General Public License. This except- * |
| * ion does not however invalidate any other reasons why the executable * |
| * file might be covered by the GNU Public License. * |
| * * |
| * 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 (_AIX) || defined (unix)) && !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; |
| act.sa_flags = SA_RESTART; |
| 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 (); |
| break; |
| |
| case CTRL_CLOSE_EVENT: |
| case CTRL_LOGOFF_EVENT: |
| case CTRL_SHUTDOWN_EVENT: |
| break; |
| } |
| } |
| |
| 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 |