aboutsummaryrefslogtreecommitdiffstats
path: root/gcc-4.2.1/gcc/ada/g-ctrl_c.ads
diff options
context:
space:
mode:
Diffstat (limited to 'gcc-4.2.1/gcc/ada/g-ctrl_c.ads')
-rw-r--r--gcc-4.2.1/gcc/ada/g-ctrl_c.ads68
1 files changed, 68 insertions, 0 deletions
diff --git a/gcc-4.2.1/gcc/ada/g-ctrl_c.ads b/gcc-4.2.1/gcc/ada/g-ctrl_c.ads
new file mode 100644
index 000000000..a7bd5600d
--- /dev/null
+++ b/gcc-4.2.1/gcc/ada/g-ctrl_c.ads
@@ -0,0 +1,68 @@
+------------------------------------------------------------------------------
+-- --
+-- GNAT RUN-TIME COMPONENTS --
+-- --
+-- G N A T . C T R L _ C --
+-- --
+-- S p e c --
+-- --
+-- Copyright (C) 2002-2006, AdaCore --
+-- --
+-- 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 other files instantiate generics from this --
+-- unit, or you link this unit with other files to produce an executable, --
+-- this unit does not by itself cause the resulting executable to be --
+-- covered by the GNU General Public License. This exception 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. --
+-- --
+------------------------------------------------------------------------------
+
+-- This package may be used to intercept the interruption of a running
+-- program by the operator typing Control-C, without having to use an Ada
+-- interrupt handler protected object.
+
+-- This package is currently implemented under Windows and Unix platforms
+
+-- Note concerning Unix systems:
+
+-- The behavior of this package when using tasking depends on the interaction
+-- between sigaction() and the thread library.
+
+-- On most implementations, the interaction will be no different whether
+-- tasking is involved or not. An exception is GNU/Linux systems where
+-- each task/thread is considered as a separate process by the kernel,
+-- meaning in particular that a Ctrl-C from the keyboard will be sent to
+-- all tasks instead of only one, resulting in multiple calls to the handler.
+
+package GNAT.Ctrl_C is
+
+ type Handler_Type is access procedure;
+ -- Any parameterless library level procedure can be used as a handler.
+ -- Handler_Type should not propagate exceptions.
+
+ procedure Install_Handler (Handler : Handler_Type);
+ -- Set up Handler to be called if the operator hits Ctrl-C, instead of the
+ -- standard Control-C handler.
+
+ procedure Uninstall_Handler;
+ -- Reinstall the standard Control-C handler.
+ -- If Install_Handler has never been called, this procedure has no effect.
+
+private
+ pragma Import (C, Install_Handler, "__gnat_install_int_handler");
+ pragma Import (C, Uninstall_Handler, "__gnat_uninstall_int_handler");
+end GNAT.Ctrl_C;