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jeremybenn |
------------------------------------------------------------------------------
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-- --
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-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
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-- --
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-- S Y S T E M . O S _ I N T E R F A C E --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 1991-1994, Florida State University --
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-- Copyright (C) 1995-2009, AdaCore --
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-- --
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-- GNARL 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 2, or (at your option) any later ver- --
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-- sion. GNARL 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. See the GNU General Public License --
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-- for more details. You should have received a copy of the GNU General --
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-- Public License distributed with GNARL; see file COPYING. If not, write --
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-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
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-- Boston, MA 02110-1301, USA. --
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-- --
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-- As a special exception, if other files instantiate generics from this --
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-- unit, or you link this unit with other files to produce an executable, --
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-- this unit does not by itself cause the resulting executable to be --
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-- covered by the GNU General Public License. This exception does not --
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-- however invalidate any other reasons why the executable file might be --
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-- covered by the GNU Public License. --
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-- --
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-- GNARL was developed by the GNARL team at Florida State 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 a OpenVMS/Alpha version of this package
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-- This package encapsulates all direct interfaces to OS services
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-- that are needed by children of System.
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pragma Polling (Off);
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-- Turn off polling, we do not want ATC polling to take place during
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-- tasking operations. It causes infinite loops and other problems.
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with Interfaces.C; use Interfaces.C;
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with System.Machine_Code; use System.Machine_Code;
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package body System.OS_Interface is
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------------------
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-- pthread_self --
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------------------
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function pthread_self return pthread_t is
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use ASCII;
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Self : pthread_t;
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begin
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Asm ("call_pal 0x9e" & LF & HT &
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"bis $31, $0, %0",
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Outputs => pthread_t'Asm_Output ("=r", Self),
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Clobber => "$0",
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Volatile => True);
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return Self;
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end pthread_self;
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-----------------
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-- sched_yield --
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-----------------
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function sched_yield return int is
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procedure sched_yield_base;
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pragma Import (C, sched_yield_base, "PTHREAD_YIELD_NP");
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begin
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sched_yield_base;
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return 0;
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end sched_yield;
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end System.OS_Interface;
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