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) 2009, 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 GNU/Linux version of this module 33 34package body System.Task_Info is 35 36 N_CPU : Natural := 0; 37 pragma Atomic (N_CPU); 38 -- Cache CPU number. Use pragma Atomic to avoid a race condition when 39 -- setting N_CPU in Number_Of_Processors below. 40 41 -------------------------- 42 -- Number_Of_Processors -- 43 -------------------------- 44 45 function Number_Of_Processors return Positive is 46 begin 47 if N_CPU = 0 then 48 N_CPU := Natural 49 (OS_Interface.sysconf (OS_Interface.SC_NPROCESSORS_ONLN)); 50 end if; 51 52 return N_CPU; 53 end Number_Of_Processors; 54 55end System.Task_Info; 56