| ------------------------------------------------------------------------------ |
| -- -- |
| -- 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) 1995-2005, 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"); |
| 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; |
