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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- S Y S T E M . T A S K _ I N F O --
-- --
-- B o d y --
-- --
-- Copyright (C) 2007-2009, 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- --
-- ware Foundation; either version 3, 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. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception, --
-- version 3.1, as published by the Free Software Foundation. --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
-- This is the Windows (native) version of this module
with System.OS_Interface;
pragma Unreferenced (System.OS_Interface);
-- System.OS_Interface is not used today, but the protocol between the
-- run-time and the binder is that any tasking application uses
-- System.OS_Interface, so notify the binder with this "with" clause.
package body System.Task_Info is
N_CPU : Natural := 0;
pragma Atomic (N_CPU);
-- Cache CPU number. Use pragma Atomic to avoid a race condition when
-- setting N_CPU in Number_Of_Processors below.
--------------------------
-- Number_Of_Processors --
--------------------------
function Number_Of_Processors return Positive is
begin
if N_CPU = 0 then
declare
SI : aliased Win32.SYSTEM_INFO;
begin
Win32.GetSystemInfo (SI'Access);
N_CPU := Positive (SI.dwNumberOfProcessors);
end;
end if;
return N_CPU;
end Number_Of_Processors;
end System.Task_Info;
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