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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
-- --
-- S Y S T E M . O S _ I N T E R F A C E --
-- --
-- B o d y --
-- --
-- Copyright (C) 1991-1994, Florida State University --
-- Copyright (C) 1995-2009, AdaCore --
-- --
-- GNARL is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 2, or (at your option) any later ver- --
-- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
-- Public License distributed with GNARL; see file COPYING. If not, write --
-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
-- Boston, MA 02110-1301, USA. --
-- --
-- As a special exception, if other files instantiate generics from this --
-- unit, or you link this unit with other files to produce an executable, --
-- this unit does not by itself cause the resulting executable to be --
-- covered by the GNU General Public License. This exception does not --
-- however invalidate any other reasons why the executable file might be --
-- covered by the GNU Public License. --
-- --
-- GNARL was developed by the GNARL team at Florida State University. --
-- Extensive contributions were provided by Ada Core Technologies, Inc. --
-- --
------------------------------------------------------------------------------
-- This is a OpenVMS/Alpha version of this package
-- This package encapsulates all direct interfaces to OS services
-- that are needed by children of System.
pragma Polling (Off);
-- Turn off polling, we do not want ATC polling to take place during
-- tasking operations. It causes infinite loops and other problems.
with Interfaces.C; use Interfaces.C;
with System.Machine_Code; use System.Machine_Code;
package body System.OS_Interface is
------------------
-- pthread_self --
------------------
function pthread_self return pthread_t is
use ASCII;
Self : pthread_t;
begin
Asm ("call_pal 0x9e" & LF & HT &
"bis $31, $0, %0",
Outputs => pthread_t'Asm_Output ("=r", Self),
Clobber => "$0",
Volatile => True);
return Self;
end pthread_self;
-----------------
-- sched_yield --
-----------------
function sched_yield return int is
procedure sched_yield_base;
pragma Import (C, sched_yield_base, "PTHREAD_YIELD_NP");
begin
sched_yield_base;
return 0;
end sched_yield;
end System.OS_Interface;
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