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-------------------------------------------------------------------------------
--- --
--- 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) 1991-2008 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_Target_Priority --
- ------------------------
-
- function To_Target_Priority
- (Prio : System.Any_Priority) return Interfaces.C.int
- is
- begin
- return Interfaces.C.int (Prio);
- end To_Target_Priority;
-
- -----------------
- -- 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;
-
- function sigaltstack
- (ss : not null access stack_t;
- oss : access stack_t) return int is
- pragma Unreferenced (ss);
- pragma Unreferenced (oss);
- begin
- return 0;
- end sigaltstack;
-
-end System.OS_Interface;