diff options
Diffstat (limited to 'gcc/ada/ctrl_c.c')
| -rw-r--r-- | gcc/ada/ctrl_c.c | 34 |
1 files changed, 30 insertions, 4 deletions
diff --git a/gcc/ada/ctrl_c.c b/gcc/ada/ctrl_c.c index a860b76..7f8d177 100644 --- a/gcc/ada/ctrl_c.c +++ b/gcc/ada/ctrl_c.c @@ -6,7 +6,7 @@ * * * C Implementation File * * * - * Copyright (C) 2002-2009, Free Software Foundation, Inc. * + * Copyright (C) 2002-2013, 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- * @@ -50,7 +50,24 @@ void __gnat_uninstall_int_handler (void); /* POSIX implementation */ #if (defined (__unix__) || defined (_AIX) || defined (__APPLE__)) \ - && !defined (__vxworks) + || defined (VMS) && !defined (__vxworks) + +#ifdef VMS +/* On VMS _gnat_handle_vms_condition gets control first, and it has to + resignal the Ctrl/C in order for sigaction to gain control and execute + the user handler routine, but in doing so propagates the condition + causing the program to terminate. So instead we install a dummy handler + routine and put the real user handler in a special global variable so + that __gnat_handle_vms_condition can declare an AST to asynchronously + execute the Ctrl/C user handler at some future time and allow + __gnat_handle_vms_condition to return and not be held up waiting for + the potentially unbounded time required to execute the Crtl/C handler. */ +void +dummy_handler () {} + +/* Lives in init.c. */ +extern void (*__gnat_ctrl_c_handler) (void); +#endif #include <signal.h> @@ -75,8 +92,8 @@ __gnat_install_int_handler (void (*proc) (void)) if (sigint_intercepted == 0) { act.sa_handler = __gnat_int_handler; -#if defined (__Lynx__) - /* LynxOS does not support SA_RESTART. */ +#if defined (__Lynx__) || defined (VMS) + /* LynxOS and VMS do not support SA_RESTART. */ act.sa_flags = 0; #else act.sa_flags = SA_RESTART; @@ -85,7 +102,12 @@ __gnat_install_int_handler (void (*proc) (void)) sigaction (SIGINT, &act, &original_act); } +#ifdef VMS + sigint_intercepted = &dummy_handler; + __gnat_ctrl_c_handler = proc; +#else sigint_intercepted = proc; +#endif } /* Restore original handler */ @@ -98,6 +120,10 @@ __gnat_uninstall_int_handler (void) sigaction (SIGINT, &original_act, 0); sigint_intercepted = 0; } +#ifdef VMS + if (__gnat_ctrl_c_handler) + __gnat_ctrl_c_handler = 0; +#endif } /* Windows implementation */ |