157 lines
4.6 KiB
C
157 lines
4.6 KiB
C
/****************************************************************************
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* *
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* GNAT COMPILER COMPONENTS *
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* *
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* C T R L _ C *
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* *
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* C Implementation File *
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* *
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* Copyright (C) 2002-2003, Free Software Foundation, Inc. *
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* *
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* GNAT is free software; you can redistribute it and/or modify it under *
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* terms of the GNU General Public License as published by the Free Soft- *
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* ware Foundation; either version 2, or (at your option) any later ver- *
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* sion. GNAT is distributed in the hope that it will be useful, but WITH- *
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* OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY *
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License *
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* for more details. You should have received a copy of the GNU General *
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* Public License distributed with GNAT; see file COPYING. If not, write *
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* to the Free Software Foundation, 51 Franklin Street, Fifth Floor, *
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* Boston, MA 02110-1301, USA. *
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* *
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* As a special exception, if you link this file with other files to *
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* produce an executable, this file does not by itself cause the resulting *
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* executable to be covered by the GNU General Public License. This except- *
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* ion does not however invalidate any other reasons why the executable *
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* file might be covered by the GNU Public License. *
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* *
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* GNAT was originally developed by the GNAT team at New York University. *
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* Extensive contributions were provided by Ada Core Technologies Inc. *
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* *
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****************************************************************************/
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#ifdef IN_RTS
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#include "tconfig.h"
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#include "tsystem.h"
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#include <sys/stat.h>
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#else
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#include "config.h"
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#include "system.h"
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#endif
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/* Services to intercept Ctrl-C */
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/* __gnat_install_int_handler will install the specified handler.
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If called for the first time, it will also save the original handler */
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void __gnat_install_int_handler (void (*) (void));
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/* __gnat_uninstall_int_handler will reinstall the original handler */
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void __gnat_uninstall_int_handler (void);
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/* POSIX implementation */
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#if (defined (_AIX) || defined (unix)) && !defined (__vxworks)
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#include <signal.h>
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void (*sigint_intercepted) (void) = 0;
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struct sigaction original_act;
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static void
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__gnat_int_handler (int sig __attribute__ ((unused)))
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{
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if (sigint_intercepted != 0)
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sigint_intercepted ();
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}
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/* Install handler and save original handler. */
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void
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__gnat_install_int_handler (void (*proc) (void))
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{
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struct sigaction act;
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if (sigint_intercepted == 0)
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{
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act.sa_handler = __gnat_int_handler;
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act.sa_flags = SA_RESTART;
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sigemptyset (&act.sa_mask);
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sigaction (SIGINT, &act, &original_act);
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}
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sigint_intercepted = proc;
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}
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/* Restore original handler */
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void
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__gnat_uninstall_int_handler (void)
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{
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if (sigint_intercepted != 0)
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{
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sigaction (SIGINT, &original_act, 0);
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sigint_intercepted = 0;
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}
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}
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/* Windows implementation */
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#elif defined (__MINGW32__)
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#include "mingw32.h"
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#include <windows.h>
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void (*sigint_intercepted) (void) = NULL;
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static BOOL WINAPI
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__gnat_int_handler (DWORD dwCtrlType)
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{
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switch (dwCtrlType)
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{
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case CTRL_C_EVENT:
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case CTRL_BREAK_EVENT:
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if (sigint_intercepted != 0)
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sigint_intercepted ();
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break;
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case CTRL_CLOSE_EVENT:
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case CTRL_LOGOFF_EVENT:
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case CTRL_SHUTDOWN_EVENT:
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break;
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}
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}
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void
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__gnat_install_int_handler (void (*proc) (void))
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{
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if (sigint_intercepted == NULL)
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SetConsoleCtrlHandler (__gnat_int_handler, TRUE);
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sigint_intercepted = proc;
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}
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void
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__gnat_uninstall_int_handler (void)
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{
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if (sigint_intercepted != NULL)
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SetConsoleCtrlHandler (__gnat_int_handler, FALSE);
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sigint_intercepted = NULL;
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}
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/* Default implementation: do nothing */
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#else
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void
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__gnat_install_int_handler (void (*proc) (void) __attribute__ ((unused)))
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{
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}
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void
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__gnat_uninstall_int_handler (void)
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{
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}
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#endif
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