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jeremybenn |
------------------------------------------------------------------------------
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-- --
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-- GNAT COMPILER COMPONENTS --
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-- --
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-- S Y S T E M . T A S K _ I N F O --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 2007-2009, Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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-- This is the Windows (native) version of this module
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with System.OS_Interface;
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pragma Unreferenced (System.OS_Interface);
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-- System.OS_Interface is not used today, but the protocol between the
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-- run-time and the binder is that any tasking application uses
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-- System.OS_Interface, so notify the binder with this "with" clause.
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package body System.Task_Info is
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N_CPU : Natural := 0;
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pragma Atomic (N_CPU);
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-- Cache CPU number. Use pragma Atomic to avoid a race condition when
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-- setting N_CPU in Number_Of_Processors below.
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--------------------------
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-- Number_Of_Processors --
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--------------------------
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function Number_Of_Processors return Positive is
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begin
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if N_CPU = 0 then
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declare
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SI : aliased Win32.SYSTEM_INFO;
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begin
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Win32.GetSystemInfo (SI'Access);
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N_CPU := Positive (SI.dwNumberOfProcessors);
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end;
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end if;
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return N_CPU;
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end Number_Of_Processors;
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end System.Task_Info;
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