80 lines
3.7 KiB
Ada
80 lines
3.7 KiB
Ada
------------------------------------------------------------------------------
|
|
-- --
|
|
-- 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) 1995-2006, 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;
|