111
|
1 ------------------------------------------------------------------------------
|
|
2 -- --
|
|
3 -- GNAT COMPILER COMPONENTS --
|
|
4 -- --
|
|
5 -- S Y S T E M . T A S K _ I N F O --
|
|
6 -- --
|
|
7 -- B o d y --
|
|
8 -- --
|
|
9 -- Copyright (C) 2007-2017, 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 is the Windows (native) version of this module
|
|
33
|
|
34 with System.OS_Interface;
|
|
35 pragma Unreferenced (System.OS_Interface);
|
|
36 -- System.OS_Interface is not used today, but the protocol between the
|
|
37 -- run-time and the binder is that any tasking application uses
|
|
38 -- System.OS_Interface, so notify the binder with this "with" clause.
|
|
39
|
|
40 package body System.Task_Info is
|
|
41
|
|
42 N_CPU : Natural := 0;
|
|
43 pragma Atomic (N_CPU);
|
|
44 -- Cache CPU number. Use pragma Atomic to avoid a race condition when
|
|
45 -- setting N_CPU in Number_Of_Processors below.
|
|
46
|
|
47 --------------------------
|
|
48 -- Number_Of_Processors --
|
|
49 --------------------------
|
|
50
|
|
51 function Number_Of_Processors return Positive is
|
|
52 begin
|
|
53 if N_CPU = 0 then
|
|
54 declare
|
|
55 SI : aliased Win32.SYSTEM_INFO;
|
|
56 begin
|
|
57 Win32.GetSystemInfo (SI'Access);
|
|
58 N_CPU := Positive (SI.dwNumberOfProcessors);
|
|
59 end;
|
|
60 end if;
|
|
61
|
|
62 return N_CPU;
|
|
63 end Number_Of_Processors;
|
|
64
|
|
65 end System.Task_Info;
|