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) 2007-2019, 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 is the Windows (native) version of this module 33 34with System.OS_Interface; 35pragma 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 40package 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 65end System.Task_Info; 66