gcc/ada/5gproinf.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                 S Y S T E M . P R O G R A M  _  I N F O                  --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --                                                                          --
  10 --          Copyright (C) 1997-1999 Free Software Foundation, Inc.          --
  11 --                                                                          --
  12 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  13 -- terms of the  GNU General Public License as published  by the Free Soft- --
  14 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  15 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  16 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  17 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  18 -- for  more details.  You should have  received  a copy of the GNU General --
  19 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  20 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  21 -- MA 02111-1307, USA.                                                      --
  22 --                                                                          --
  23 -- As a special exception,  if other files  instantiate  generics from this --
  24 -- unit, or you link  this unit with other files  to produce an executable, --
  25 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  26 -- covered  by the  GNU  General  Public  License.  This exception does not --
  27 -- however invalidate  any other reasons why  the executable file  might be --
  28 -- covered by the  GNU Public License.                                      --
  29 --                                                                          --
  30 -- GNAT was originally developed  by the GNAT team at  New York University. --
  31 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
  32 --                                                                          --
  33 ------------------------------------------------------------------------------
  34
  35 --  This is an Irix (old pthread library) version of this package.
  36
  37 --  This package   contains the parameters  used by   the run-time system at
  38 --  program startup.  These parameters are  isolated in this package body to
  39 --  facilitate replacement by the end user.
  40 --
  41 --  To replace the default values, copy this source file into your build
  42 --  directory, edit the file to reflect your desired behavior, and recompile
  43 --  with the command:
  44 --
  45 --     % gcc -c -O2 -gnatpg s-proinf.adb
  46 --
  47 --  then relink your application as usual.
  48 --
  49
  50 with GNAT.OS_Lib;
  51
  52 package body System.Program_Info is
  53
  54    Kbytes : constant := 1024;
  55
  56    Default_Initial_Sproc_Count  : constant := 0;
  57    Default_Max_Sproc_Count      : constant := 128;
  58    Default_Sproc_Stack_Size     : constant := 16#4000#;
  59    Default_Stack_Guard_Pages    : constant := 1;
  60    Default_Default_Time_Slice   : constant := 0.0;
  61    Default_Default_Task_Stack   : constant := 12 * Kbytes;
  62    Default_Pthread_Sched_Signal : constant := 35;
  63    Default_Pthread_Arena_Size   : constant := 16#40000#;
  64    Default_Os_Default_Priority  : constant := 0;
  65
  66    -------------------------
  67    -- Initial_Sproc_Count --
  68    -------------------------
  69
  70    function Initial_Sproc_Count return Integer is
  71
  72       function sysmp (P1 : Integer) return Integer;
  73       pragma Import (C, sysmp, "sysmp", "sysmp");
  74
  75       MP_NPROCS : constant := 1; --   # processor in complex
  76
  77       Pthread_Sproc_Count : constant GNAT.OS_Lib.String_Access :=
  78         GNAT.OS_Lib.Getenv ("PTHREAD_SPROC_COUNT");
  79
  80    begin
  81       if Pthread_Sproc_Count.all'Length = 0 then
  82          return Default_Initial_Sproc_Count;
  83
  84       elsif Pthread_Sproc_Count.all = "AUTO" then
  85          return sysmp (MP_NPROCS);
  86
  87       else
  88          return Integer'Value (Pthread_Sproc_Count.all);
  89       end if;
  90    exception
  91       when others =>
  92          return Default_Initial_Sproc_Count;
  93    end Initial_Sproc_Count;
  94
  95    ---------------------
  96    -- Max_Sproc_Count --
  97    ---------------------
  98
  99    function Max_Sproc_Count return Integer is
 100       Pthread_Max_Sproc_Count : constant GNAT.OS_Lib.String_Access :=
 101         GNAT.OS_Lib.Getenv ("PTHREAD_MAX_SPROC_COUNT");
 102
 103    begin
 104       if Pthread_Max_Sproc_Count.all'Length = 0 then
 105          return Default_Max_Sproc_Count;
 106       else
 107          return Integer'Value (Pthread_Max_Sproc_Count.all);
 108       end if;
 109    exception
 110       when others =>
 111          return Default_Max_Sproc_Count;
 112    end Max_Sproc_Count;
 113
 114    ----------------------
 115    -- Sproc_Stack_Size --
 116    ----------------------
 117
 118    function Sproc_Stack_Size return Integer is
 119    begin
 120       return Default_Sproc_Stack_Size;
 121    end Sproc_Stack_Size;
 122
 123    ------------------------
 124    -- Default_Time_Slice --
 125    ------------------------
 126
 127    function Default_Time_Slice return Duration is
 128       Pthread_Time_Slice_Sec : constant GNAT.OS_Lib.String_Access :=
 129         GNAT.OS_Lib.Getenv ("PTHREAD_TIME_SLICE_SEC");
 130       Pthread_Time_Slice_Usec : constant GNAT.OS_Lib.String_Access :=
 131         GNAT.OS_Lib.Getenv ("PTHREAD_TIME_SLICE_USEC");
 132
 133       Val_Sec, Val_Usec : Integer := 0;
 134
 135    begin
 136       if Pthread_Time_Slice_Sec.all'Length /= 0 or
 137         Pthread_Time_Slice_Usec.all'Length /= 0
 138       then
 139          if Pthread_Time_Slice_Sec.all'Length /= 0 then
 140             Val_Sec := Integer'Value (Pthread_Time_Slice_Sec.all);
 141          end if;
 142
 143          if Pthread_Time_Slice_Usec.all'Length /= 0 then
 144             Val_Usec := Integer'Value (Pthread_Time_Slice_Usec.all);
 145          end if;
 146
 147          return Duration (Val_Sec) + Duration (Val_Usec) / 1000.0;
 148       else
 149          return Default_Default_Time_Slice;
 150       end if;
 151
 152    exception
 153       when others =>
 154          return Default_Default_Time_Slice;
 155    end Default_Time_Slice;
 156
 157    ------------------------
 158    -- Default_Task_Stack --
 159    ------------------------
 160
 161    function Default_Task_Stack return Integer is
 162    begin
 163       return Default_Default_Task_Stack;
 164    end Default_Task_Stack;
 165
 166    -----------------------
 167    -- Stack_Guard_Pages --
 168    -----------------------
 169
 170    function Stack_Guard_Pages return Integer is
 171       Pthread_Stack_Guard_Pages : constant GNAT.OS_Lib.String_Access :=
 172         GNAT.OS_Lib.Getenv ("PTHREAD_STACK_GUARD_PAGES");
 173
 174    begin
 175       if Pthread_Stack_Guard_Pages.all'Length /= 0 then
 176          return Integer'Value (Pthread_Stack_Guard_Pages.all);
 177       else
 178          return Default_Stack_Guard_Pages;
 179       end if;
 180    exception
 181       when others =>
 182          return Default_Stack_Guard_Pages;
 183    end Stack_Guard_Pages;
 184
 185    --------------------------
 186    -- Pthread_Sched_Signal --
 187    --------------------------
 188
 189    function Pthread_Sched_Signal return Integer is
 190    begin
 191       return Default_Pthread_Sched_Signal;
 192    end Pthread_Sched_Signal;
 193
 194    ------------------------
 195    -- Pthread_Arena_Size --
 196    ------------------------
 197
 198    function Pthread_Arena_Size  return Integer is
 199       Pthread_Arena_Size : constant GNAT.OS_Lib.String_Access :=
 200         GNAT.OS_Lib.Getenv ("PTHREAD_ARENA_SIZE");
 201
 202    begin
 203       if Pthread_Arena_Size.all'Length = 0 then
 204          return Default_Pthread_Arena_Size;
 205       else
 206          return Integer'Value (Pthread_Arena_Size.all);
 207       end if;
 208    exception
 209       when others =>
 210          return Default_Pthread_Arena_Size;
 211    end Pthread_Arena_Size;
 212
 213    -------------------------
 214    -- Os_Default_Priority --
 215    -------------------------
 216
 217    function Os_Default_Priority return Integer is
 218    begin
 219       return Default_Os_Default_Priority;
 220    end Os_Default_Priority;
 221
 222 end System.Program_Info;