1------------------------------------------------------------------------------ 2-- -- 3-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS -- 4-- -- 5-- S Y S T E M . O S _ I N T E R F A C E -- 6-- -- 7-- B o d y -- 8-- -- 9-- Copyright (C) 1991-1994, Florida State University -- 10-- Copyright (C) 1995-2012, AdaCore -- 11-- -- 12-- GNAT is free software; you can redistribute it and/or modify it under -- 13-- terms of the GNU General Public License as published by the Free Soft- -- 14-- ware Foundation; either version 3, or (at your option) any later ver- -- 15-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- 16-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- 17-- or FITNESS FOR A PARTICULAR PURPOSE. -- 18-- -- 19-- As a special exception under Section 7 of GPL version 3, you are granted -- 20-- additional permissions described in the GCC Runtime Library Exception, -- 21-- version 3.1, as published by the Free Software Foundation. -- 22-- -- 23-- You should have received a copy of the GNU General Public License and -- 24-- a copy of the GCC Runtime Library Exception along with this program; -- 25-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- 26-- <http://www.gnu.org/licenses/>. -- 27-- -- 28-- GNARL was developed by the GNARL team at Florida State University. -- 29-- Extensive contributions were provided by Ada Core Technologies, Inc. -- 30-- -- 31------------------------------------------------------------------------------ 32 33-- This is the OpenVMS version of this package 34 35-- This package encapsulates all direct interfaces to OS services 36-- that are needed by children of System. 37 38pragma Polling (Off); 39-- Turn off polling, we do not want ATC polling to take place during 40-- tasking operations. It causes infinite loops and other problems. 41 42with Interfaces.C; use Interfaces.C; 43 44package body System.OS_Interface is 45 46 ----------------- 47 -- sched_yield -- 48 ----------------- 49 50 function sched_yield return int is 51 procedure sched_yield_base; 52 pragma Import (C, sched_yield_base, "PTHREAD_YIELD_NP"); 53 54 begin 55 sched_yield_base; 56 return 0; 57 end sched_yield; 58 59end System.OS_Interface; 60