gcc/ada/s-proinf-irix-athread.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 --          Copyright (C) 1997-2005 Free Software Foundation, Inc.          --
  10 --                                                                          --
  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  14 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  19 -- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --
  20 -- Boston, MA 02110-1301, USA.                                              --
  21 --                                                                          --
  22 -- As a special exception,  if other files  instantiate  generics from this --
  23 -- unit, or you link  this unit with other files  to produce an executable, --
  24 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  25 -- covered  by the  GNU  General  Public  License.  This exception does not --
  26 -- however invalidate  any other reasons why  the executable file  might be --
  27 -- covered by the  GNU Public License.                                      --
  28 --                                                                          --
  29 -- GNAT was originally developed  by the GNAT team at  New York University. --
  30 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  31 --                                                                          --
  32 ------------------------------------------------------------------------------
  33
  34 --  This is an Irix (old pthread library) version of this package.
  35
  36 --  This package   contains the parameters  used by   the run-time system at
  37 --  program startup.  These parameters are  isolated in this package body to
  38 --  facilitate replacement by the end user.
  39 --
  40 --  To replace the default values, copy this source file into your build
  41 --  directory, edit the file to reflect your desired behavior, and recompile
  42 --  with the command:
  43 --
  44 --     % gcc -c -O2 -gnatpg s-proinf.adb
  45 --
  46 --  then relink your application as usual.
  47 --
  48
  49 pragma Warnings (Off);
  50 with GNAT.OS_Lib;
  51 pragma Warnings (On);
  52
  53 package body System.Program_Info is
  54
  55    Kbytes : constant := 1024;
  56
  57    Default_Initial_Sproc_Count  : constant := 0;
  58    Default_Max_Sproc_Count      : constant := 128;
  59    Default_Sproc_Stack_Size     : constant := 16#4000#;
  60    Default_Stack_Guard_Pages    : constant := 1;
  61    Default_Default_Time_Slice   : constant := 0.0;
  62    Default_Default_Task_Stack   : constant := 12 * Kbytes;
  63    Default_Pthread_Sched_Signal : constant := 35;
  64    Default_Pthread_Arena_Size   : constant := 16#40000#;
  65    Default_Os_Default_Priority  : constant := 0;
  66
  67    -------------------------
  68    -- Initial_Sproc_Count --
  69    -------------------------
  70
  71    function Initial_Sproc_Count return Integer is
  72
  73       function sysmp (P1 : Integer) return Integer;
  74       pragma Import (C, sysmp, "sysmp", "sysmp");
  75
  76       MP_NPROCS : constant := 1; --   # processor in complex
  77
  78       Pthread_Sproc_Count : constant GNAT.OS_Lib.String_Access :=
  79         GNAT.OS_Lib.Getenv ("PTHREAD_SPROC_COUNT");
  80
  81    begin
  82       if Pthread_Sproc_Count.all'Length = 0 then
  83          return Default_Initial_Sproc_Count;
  84
  85       elsif Pthread_Sproc_Count.all = "AUTO" then
  86          return sysmp (MP_NPROCS);
  87
  88       else
  89          return Integer'Value (Pthread_Sproc_Count.all);
  90       end if;
  91    exception
  92       when others =>
  93          return Default_Initial_Sproc_Count;
  94    end Initial_Sproc_Count;
  95
  96    ---------------------
  97    -- Max_Sproc_Count --
  98    ---------------------
  99
 100    function Max_Sproc_Count return Integer is
 101       Pthread_Max_Sproc_Count : constant GNAT.OS_Lib.String_Access :=
 102         GNAT.OS_Lib.Getenv ("PTHREAD_MAX_SPROC_COUNT");
 103
 104    begin
 105       if Pthread_Max_Sproc_Count.all'Length = 0 then
 106          return Default_Max_Sproc_Count;
 107       else
 108          return Integer'Value (Pthread_Max_Sproc_Count.all);
 109       end if;
 110    exception
 111       when others =>
 112          return Default_Max_Sproc_Count;
 113    end Max_Sproc_Count;
 114
 115    ----------------------
 116    -- Sproc_Stack_Size --
 117    ----------------------
 118
 119    function Sproc_Stack_Size return Integer is
 120    begin
 121       return Default_Sproc_Stack_Size;
 122    end Sproc_Stack_Size;
 123
 124    ------------------------
 125    -- Default_Time_Slice --
 126    ------------------------
 127
 128    function Default_Time_Slice return Duration is
 129       Pthread_Time_Slice_Sec : constant GNAT.OS_Lib.String_Access :=
 130         GNAT.OS_Lib.Getenv ("PTHREAD_TIME_SLICE_SEC");
 131       Pthread_Time_Slice_Usec : constant GNAT.OS_Lib.String_Access :=
 132         GNAT.OS_Lib.Getenv ("PTHREAD_TIME_SLICE_USEC");
 133
 134       Val_Sec, Val_Usec : Integer := 0;
 135
 136    begin
 137       if Pthread_Time_Slice_Sec.all'Length /= 0 or
 138         Pthread_Time_Slice_Usec.all'Length /= 0
 139       then
 140          if Pthread_Time_Slice_Sec.all'Length /= 0 then
 141             Val_Sec := Integer'Value (Pthread_Time_Slice_Sec.all);
 142          end if;
 143
 144          if Pthread_Time_Slice_Usec.all'Length /= 0 then
 145             Val_Usec := Integer'Value (Pthread_Time_Slice_Usec.all);
 146          end if;
 147
 148          return Duration (Val_Sec) + Duration (Val_Usec) / 1000.0;
 149       else
 150          return Default_Default_Time_Slice;
 151       end if;
 152
 153    exception
 154       when others =>
 155          return Default_Default_Time_Slice;
 156    end Default_Time_Slice;
 157
 158    ------------------------
 159    -- Default_Task_Stack --
 160    ------------------------
 161
 162    function Default_Task_Stack return Integer is
 163    begin
 164       return Default_Default_Task_Stack;
 165    end Default_Task_Stack;
 166
 167    -----------------------
 168    -- Stack_Guard_Pages --
 169    -----------------------
 170
 171    function Stack_Guard_Pages return Integer is
 172       Pthread_Stack_Guard_Pages : constant GNAT.OS_Lib.String_Access :=
 173         GNAT.OS_Lib.Getenv ("PTHREAD_STACK_GUARD_PAGES");
 174
 175    begin
 176       if Pthread_Stack_Guard_Pages.all'Length /= 0 then
 177          return Integer'Value (Pthread_Stack_Guard_Pages.all);
 178       else
 179          return Default_Stack_Guard_Pages;
 180       end if;
 181    exception
 182       when others =>
 183          return Default_Stack_Guard_Pages;
 184    end Stack_Guard_Pages;
 185
 186    --------------------------
 187    -- Pthread_Sched_Signal --
 188    --------------------------
 189
 190    function Pthread_Sched_Signal return Integer is
 191    begin
 192       return Default_Pthread_Sched_Signal;
 193    end Pthread_Sched_Signal;
 194
 195    ------------------------
 196    -- Pthread_Arena_Size --
 197    ------------------------
 198
 199    function Pthread_Arena_Size  return Integer is
 200       Pthread_Arena_Size : constant GNAT.OS_Lib.String_Access :=
 201         GNAT.OS_Lib.Getenv ("PTHREAD_ARENA_SIZE");
 202
 203    begin
 204       if Pthread_Arena_Size.all'Length = 0 then
 205          return Default_Pthread_Arena_Size;
 206       else
 207          return Integer'Value (Pthread_Arena_Size.all);
 208       end if;
 209    exception
 210       when others =>
 211          return Default_Pthread_Arena_Size;
 212    end Pthread_Arena_Size;
 213
 214    -------------------------
 215    -- Os_Default_Priority --
 216    -------------------------
 217
 218    function Os_Default_Priority return Integer is
 219    begin
 220       return Default_Os_Default_Priority;
 221    end Os_Default_Priority;
 222
 223 end System.Program_Info;