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Diffstat (limited to 'gcc/ada/ctrl_c.c')
| -rw-r--r-- | gcc/ada/ctrl_c.c | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/gcc/ada/ctrl_c.c b/gcc/ada/ctrl_c.c new file mode 100644 index 00000000000..7d7eef043e4 --- /dev/null +++ b/gcc/ada/ctrl_c.c @@ -0,0 +1,158 @@ +/**************************************************************************** + * * + * 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, 59 Temple Place - Suite 330, Boston, * + * MA 02111-1307, 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); + +static void __gnat_int_handler (int); + +/* 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) () = 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 () +{ + 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 () +{ +} +#endif |