1------------------------------------------------------------------------------
2--                                                                          --
3--                         GNAT RUN-TIME COMPONENTS                         --
4--                                                                          --
5--                         G N A T . S I G N A L S                          --
6--                                                                          --
7--                                 S p e c                                  --
8--                                                                          --
9--          Copyright (C) 2003-2019, Free Software Foundation, Inc.         --
10--                                                                          --
11-- GNAT is free software;  you can  redistribute it  and/or modify it under --
12-- terms of the  GNU General Public License as published  by the Free Soft- --
13-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
14-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
15-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
16-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
17--                                                                          --
18-- As a special exception under Section 7 of GPL version 3, you are granted --
19-- additional permissions described in the GCC Runtime Library Exception,   --
20-- version 3.1, as published by the Free Software Foundation.               --
21--                                                                          --
22-- You should have received a copy of the GNU General Public License and    --
23-- a copy of the GCC Runtime Library Exception along with this program;     --
24-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
25-- <http://www.gnu.org/licenses/>.                                          --
26--                                                                          --
27-- GNAT was originally developed  by the GNAT team at  New York University. --
28-- Extensive contributions were provided by Ada Core Technologies Inc.      --
29--                                                                          --
30------------------------------------------------------------------------------
31
32--  This package provides operations for querying and setting the blocked
33--  status of signals.
34
35--  This package is supported only on targets where Ada.Interrupts.Interrupt_ID
36--  corresponds to software signals on the target, and where System.Interrupts
37--  provides the ability to block and unblock signals.
38
39with Ada.Interrupts;
40
41package GNAT.Signals is
42
43   procedure Block_Signal (Signal : Ada.Interrupts.Interrupt_ID);
44   --  Block "Signal" at the process level
45
46   procedure Unblock_Signal (Signal : Ada.Interrupts.Interrupt_ID);
47   --  Unblock "Signal" at the process level
48
49   function Is_Blocked (Signal : Ada.Interrupts.Interrupt_ID) return Boolean;
50   --  "Signal" blocked at the process level?
51
52end GNAT.Signals;
53