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------------------------------------------------------------------------------

--                                                                          --

--                         GNAT COMPILER COMPONENTS                         --

--                                                                          --

--                 S Y S T E M . P R O G R A M  _  I N F O                  --

--                                                                          --

--                                 B o d y                                  --

--                                                                          --

--          Copyright (C) 1997-2009, Free Software Foundation, Inc.         --

--                                                                          --

-- GNAT 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 3,  or (at your option) any later ver- --

-- sion.  GNAT 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.                                     --

--                                                                          --

-- As a special exception under Section 7 of GPL version 3, you are granted --

-- additional permissions described in the GCC Runtime Library Exception,   --

-- version 3.1, as published by the Free Software Foundation.               --

--                                                                          --

-- You should have received a copy of the GNU General Public License and    --

-- a copy of the GCC Runtime Library Exception along with this program;     --

-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --

-- <http://www.gnu.org/licenses/>.                                          --

--                                                                          --

-- GNAT was originally developed  by the GNAT team at  New York University. --

-- Extensive contributions were provided by Ada Core Technologies Inc.      --

--                                                                          --

------------------------------------------------------------------------------

--  This is an Irix (old pthread library) version of this package

--  This package contains the parameters used by the run-time system at

--  program startup. These parameters are isolated in this package body to

--  facilitate replacement by the end user.

--

--  To replace the default values, copy this source file into your build

--  directory, edit the file to reflect your desired behavior, and recompile

--  with the command:

--

--     % gcc -c -O2 -gnatpg s-proinf.adb

--

--  then relink your application as usual.

pragma Warnings (Off); -- why???

with System.OS_Lib;

pragma Warnings (On);

package body System.Program_Info is

   Kbytes : constant := 1024;

   Default_Initial_Sproc_Count  : constant := 0;

   Default_Max_Sproc_Count      : constant := 128;

   Default_Sproc_Stack_Size     : constant := 16#4000#;

   Default_Stack_Guard_Pages    : constant := 1;

   Default_Default_Time_Slice   : constant := 0.0;

   Default_Default_Task_Stack   : constant := 12 * Kbytes;

   Default_Pthread_Sched_Signal : constant := 35;

   Default_Pthread_Arena_Size   : constant := 16#40000#;

   Default_Os_Default_Priority  : constant := 0;

   -------------------------

   -- Initial_Sproc_Count --

   -------------------------

   function Initial_Sproc_Count return Integer is

      function sysmp (P1 : Integer) return Integer;

      pragma Import (C, sysmp, "sysmp", "sysmp");

      MP_NPROCS : constant := 1; --   # processor in complex

      Pthread_Sproc_Count : constant System.OS_Lib.String_Access :=

        System.OS_Lib.Getenv ("PTHREAD_SPROC_COUNT");

   begin

      if Pthread_Sproc_Count.all'Length = 0 then

         return Default_Initial_Sproc_Count;

      elsif Pthread_Sproc_Count.all = "AUTO" then

         return sysmp (MP_NPROCS);

      else

         return Integer'Value (Pthread_Sproc_Count.all);

      end if;

   exception

      when others =>

         return Default_Initial_Sproc_Count;

   end Initial_Sproc_Count;

   ---------------------

   -- Max_Sproc_Count --

   ---------------------

   function Max_Sproc_Count return Integer is

      Pthread_Max_Sproc_Count : constant System.OS_Lib.String_Access :=

        System.OS_Lib.Getenv ("PTHREAD_MAX_SPROC_COUNT");

   begin

      if Pthread_Max_Sproc_Count.all'Length = 0 then

         return Default_Max_Sproc_Count;

      else

         return Integer'Value (Pthread_Max_Sproc_Count.all);

      end if;

   exception

      when others =>

         return Default_Max_Sproc_Count;

   end Max_Sproc_Count;

   ----------------------

   -- Sproc_Stack_Size --

   ----------------------

   function Sproc_Stack_Size return Integer is

   begin

      return Default_Sproc_Stack_Size;

   end Sproc_Stack_Size;

   ------------------------

   -- Default_Time_Slice --

   ------------------------

   function Default_Time_Slice return Duration is

      Pthread_Time_Slice_Sec : constant System.OS_Lib.String_Access :=

                                 System.OS_Lib.Getenv

                                   ("PTHREAD_TIME_SLICE_SEC");

      Pthread_Time_Slice_Usec : constant System.OS_Lib.String_Access :=

                                  System.OS_Lib.Getenv

                                    ("PTHREAD_TIME_SLICE_USEC");

      Val_Sec, Val_Usec : Integer := 0;

   begin

      if Pthread_Time_Slice_Sec.all'Length /= 0 or

        Pthread_Time_Slice_Usec.all'Length /= 0

      then

         if Pthread_Time_Slice_Sec.all'Length /= 0 then

            Val_Sec := Integer'Value (Pthread_Time_Slice_Sec.all);

         end if;

         if Pthread_Time_Slice_Usec.all'Length /= 0 then

            Val_Usec := Integer'Value (Pthread_Time_Slice_Usec.all);

         end if;

         return Duration (Val_Sec) + Duration (Val_Usec) / 1000.0;

      else

         return Default_Default_Time_Slice;

      end if;

   exception

      when others =>

         return Default_Default_Time_Slice;

   end Default_Time_Slice;

   ------------------------

   -- Default_Task_Stack --

   ------------------------

   function Default_Task_Stack return Integer is

   begin

      return Default_Default_Task_Stack;

   end Default_Task_Stack;

   -----------------------

   -- Stack_Guard_Pages --

   -----------------------

   function Stack_Guard_Pages return Integer is

      Pthread_Stack_Guard_Pages : constant System.OS_Lib.String_Access :=

                                    System.OS_Lib.Getenv

                                      ("PTHREAD_STACK_GUARD_PAGES");

   begin

      if Pthread_Stack_Guard_Pages.all'Length /= 0 then

         return Integer'Value (Pthread_Stack_Guard_Pages.all);

      else

         return Default_Stack_Guard_Pages;

      end if;

   exception

      when others =>

         return Default_Stack_Guard_Pages;

   end Stack_Guard_Pages;

   --------------------------

   -- Pthread_Sched_Signal --

   --------------------------

   function Pthread_Sched_Signal return Integer is

   begin

      return Default_Pthread_Sched_Signal;

   end Pthread_Sched_Signal;

   ------------------------

   -- Pthread_Arena_Size --

   ------------------------

   function Pthread_Arena_Size  return Integer is

      Pthread_Arena_Size : constant System.OS_Lib.String_Access :=

                             System.OS_Lib.Getenv

                               ("PTHREAD_ARENA_SIZE");

   begin

      if Pthread_Arena_Size.all'Length = 0 then

         return Default_Pthread_Arena_Size;

      else

         return Integer'Value (Pthread_Arena_Size.all);

      end if;

   exception

      when others =>

         return Default_Pthread_Arena_Size;

   end Pthread_Arena_Size;

   -------------------------

   -- Os_Default_Priority --

   -------------------------

   function Os_Default_Priority return Integer is

   begin

      return Default_Os_Default_Priority;

   end Os_Default_Priority;

end System.Program_Info;