| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNU ADA 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) 1991-2002 Florida State University -- |
| -- -- |
| -- 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. It is -- |
| -- now maintained by Ada Core Technologies Inc. in cooperation with Florida -- |
| -- State University (http://www.gnat.com). -- |
| -- -- |
| -- The GNARL files that were developed for RTEMS are maintained by On-Line -- |
| -- Applications Research Corporation (http://www.oarcorp.com) in coopera- -- |
| -- tion with Ada Core Technologies Inc. and Florida State University. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| -- This is the RTEMS 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; |
| package body System.OS_Interface is |
| |
| ----------------- |
| -- To_Duration -- |
| ----------------- |
| |
| function To_Duration (TS : timespec) return Duration is |
| begin |
| return Duration (TS.tv_sec) + Duration (TS.tv_nsec) / 10#1#E9; |
| end To_Duration; |
| |
| ----------------- |
| -- To_Timespec -- |
| ----------------- |
| |
| function To_Timespec (D : Duration) return timespec is |
| S : time_t; |
| F : Duration; |
| begin |
| S := time_t (Long_Long_Integer (D)); |
| F := D - Duration (S); |
| |
| -- If F has negative value due to round-up, adjust for positive F value |
| |
| if F < 0.0 then S := S - 1; F := F + 1.0; end if; |
| return timespec'(tv_sec => S, |
| tv_nsec => long (Long_Long_Integer (F * 10#1#E9))); |
| end To_Timespec; |
| |
| function To_Duration (TV : struct_timeval) return Duration is |
| begin |
| return Duration (TV.tv_sec) + Duration (TV.tv_usec) / 10#1#E6; |
| end To_Duration; |
| |
| function To_Timeval (D : Duration) return struct_timeval is |
| S : int; |
| F : Duration; |
| begin |
| S := int (Long_Long_Integer (D)); |
| F := D - Duration (S); |
| |
| -- If F has negative value due to a round-up, adjust for positive F |
| -- value. |
| if F < 0.0 then S := S - 1; F := F + 1.0; end if; |
| return |
| struct_timeval' |
| (tv_sec => S, |
| tv_usec => int (Long_Long_Integer (F * 10#1#E6))); |
| end To_Timeval; |
| |
| procedure pthread_init is |
| begin |
| null; |
| end pthread_init; |
| |
| function Get_Stack_Base (thread : pthread_t) return Address is |
| pragma Warnings (Off, thread); |
| |
| begin |
| return Null_Address; |
| end Get_Stack_Base; |
| |
| function Get_Page_Size return size_t is |
| begin |
| return 0; |
| end Get_Page_Size; |
| |
| function Get_Page_Size return Address is |
| begin |
| return 0; |
| end Get_Page_Size; |
| |
| end System.OS_Interface; |
