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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [ada/] [s-osinte-tru64.adb] - Blame information for rev 706

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1 706 jeremybenn
------------------------------------------------------------------------------
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--                                                                          --
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--                 GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS                 --
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--                                                                          --
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--                   S Y S T E M . O S _ I N T E R F A C E                  --
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--                                                                          --
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--                                  B o d y                                 --
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--                                                                          --
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--         Copyright (C) 1998-2009, Free Software Foundation, Inc.          --
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--                                                                          --
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-- GNARL is free software; you can  redistribute it  and/or modify it under --
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-- terms of the  GNU General Public License as published  by the Free Soft- --
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-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
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-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
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--                                                                          --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception,   --
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-- version 3.1, as published by the Free Software Foundation.               --
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--                                                                          --
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-- You should have received a copy of the GNU General Public License and    --
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-- a copy of the GCC Runtime Library Exception along with this program;     --
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-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
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-- <http://www.gnu.org/licenses/>.                                          --
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--                                                                          --
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-- GNARL was developed by the GNARL team at Florida State University.       --
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-- Extensive contributions were provided by Ada Core Technologies, Inc.     --
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--                                                                          --
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------------------------------------------------------------------------------
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--  This is the DEC Unix version of this package
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--  This package encapsulates all direct interfaces to OS services
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--  that are needed by children of System.
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pragma Polling (Off);
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--  Turn off polling, we do not want ATC polling to take place during
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--  tasking operations. It causes infinite loops and other problems.
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with Interfaces.C; use Interfaces.C;
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with System.Machine_Code; use System.Machine_Code;
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package body System.OS_Interface is
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   --------------------
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   -- Get_Stack_Base --
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   --------------------
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   function Get_Stack_Base (thread : pthread_t) return Address is
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      pragma Unreferenced (thread);
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   begin
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      return Null_Address;
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   end Get_Stack_Base;
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   ------------------
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   -- pthread_init --
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   ------------------
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   procedure pthread_init is
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   begin
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      null;
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   end pthread_init;
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   ------------------
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   -- pthread_self --
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   ------------------
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   function pthread_self return pthread_t is
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      Self : pthread_t;
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   begin
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      Asm ("call_pal 0x9e" & ASCII.LF & ASCII.HT &
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           "bis $31, $0, %0",
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           Outputs  => pthread_t'Asm_Output ("=r", Self),
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           Clobber  => "$0",
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           Volatile => True);
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      return Self;
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   end pthread_self;
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   ----------------------
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   -- Hide_Yellow_Zone --
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   ----------------------
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   procedure Hide_Unhide_Yellow_Zone (Hide : Boolean) is
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      type Teb_Ptr is access all pthread_teb_t;
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      Teb : Teb_Ptr;
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      Res : Interfaces.C.int;
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      pragma Unreferenced (Res);
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   begin
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      --  Get the Thread Environment Block address
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      Asm ("call_pal 0x9e" & ASCII.LF & ASCII.HT &
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           "bis $31, $0, %0",
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           Outputs  => Teb_Ptr'Asm_Output ("=r", Teb),
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           Clobber  => "$0",
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           Volatile => True);
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      --  Stick a guard page right above the Yellow Zone if it exists
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      if Teb.all.stack_yellow /= Teb.all.stack_guard then
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         Res :=
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           mprotect
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             (Teb.all.stack_yellow, Get_Page_Size,
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              prot => (if Hide then PROT_ON else PROT_OFF));
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      end if;
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   end Hide_Unhide_Yellow_Zone;
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   -----------------
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   -- To_Duration --
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   -----------------
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   function To_Duration (TS : timespec) return Duration is
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   begin
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      return Duration (TS.tv_sec) + Duration (TS.tv_nsec) / 10#1#E9;
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   end To_Duration;
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   -----------------
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   -- To_Timespec --
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   -----------------
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   function To_Timespec (D : Duration) return timespec is
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      S : time_t;
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      F : Duration;
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   begin
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      S := time_t (Long_Long_Integer (D));
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      F := D - Duration (S);
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      --  If F has negative value due to a round-up, adjust for positive F
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      --  value.
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      if F < 0.0 then
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         S := S - 1;
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         F := F + 1.0;
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      end if;
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      return timespec'(tv_sec => S,
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                       tv_nsec => long (Long_Long_Integer (F * 10#1#E9)));
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   end To_Timespec;
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end System.OS_Interface;

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