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) 1997-1999 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 with GNAT.OS_Lib;
  50
  51 package body System.Program_Info is
  52
  53    Kbytes : constant := 1024;
  54
  55    Default_Initial_Sproc_Count  : constant := 0;
  56    Default_Max_Sproc_Count      : constant := 128;
  57    Default_Sproc_Stack_Size     : constant := 16#4000#;
  58    Default_Stack_Guard_Pages    : constant := 1;
  59    Default_Default_Time_Slice   : constant := 0.0;
  60    Default_Default_Task_Stack   : constant := 12 * Kbytes;
  61    Default_Pthread_Sched_Signal : constant := 35;
  62    Default_Pthread_Arena_Size   : constant := 16#40000#;
  63    Default_Os_Default_Priority  : constant := 0;
  64
  65    -------------------------
  66    -- Initial_Sproc_Count --
  67    -------------------------
  68
  69    function Initial_Sproc_Count return Integer is
  70
  71       function sysmp (P1 : Integer) return Integer;
  72       pragma Import (C, sysmp, "sysmp", "sysmp");
  73
  74       MP_NPROCS : constant := 1; --   # processor in complex
  75
  76       Pthread_Sproc_Count : constant GNAT.OS_Lib.String_Access :=
  77         GNAT.OS_Lib.Getenv ("PTHREAD_SPROC_COUNT");
  78
  79    begin
  80       if Pthread_Sproc_Count.all'Length = 0 then
  81          return Default_Initial_Sproc_Count;
  82
  83       elsif Pthread_Sproc_Count.all = "AUTO" then
  84          return sysmp (MP_NPROCS);
  85
  86       else
  87          return Integer'Value (Pthread_Sproc_Count.all);
  88       end if;
  89    exception
  90       when others =>
  91          return Default_Initial_Sproc_Count;
  92    end Initial_Sproc_Count;
  93
  94    ---------------------
  95    -- Max_Sproc_Count --
  96    ---------------------
  97
  98    function Max_Sproc_Count return Integer is
  99       Pthread_Max_Sproc_Count : constant GNAT.OS_Lib.String_Access :=
 100         GNAT.OS_Lib.Getenv ("PTHREAD_MAX_SPROC_COUNT");
 101
 102    begin
 103       if Pthread_Max_Sproc_Count.all'Length = 0 then
 104          return Default_Max_Sproc_Count;
 105       else
 106          return Integer'Value (Pthread_Max_Sproc_Count.all);
 107       end if;
 108    exception
 109       when others =>
 110          return Default_Max_Sproc_Count;
 111    end Max_Sproc_Count;
 112
 113    ----------------------
 114    -- Sproc_Stack_Size --
 115    ----------------------
 116
 117    function Sproc_Stack_Size return Integer is
 118    begin
 119       return Default_Sproc_Stack_Size;
 120    end Sproc_Stack_Size;
 121
 122    ------------------------
 123    -- Default_Time_Slice --
 124    ------------------------
 125
 126    function Default_Time_Slice return Duration is
 127       Pthread_Time_Slice_Sec : constant GNAT.OS_Lib.String_Access :=
 128         GNAT.OS_Lib.Getenv ("PTHREAD_TIME_SLICE_SEC");
 129       Pthread_Time_Slice_Usec : constant GNAT.OS_Lib.String_Access :=
 130         GNAT.OS_Lib.Getenv ("PTHREAD_TIME_SLICE_USEC");
 131
 132       Val_Sec, Val_Usec : Integer := 0;
 133
 134    begin
 135       if Pthread_Time_Slice_Sec.all'Length /= 0 or
 136         Pthread_Time_Slice_Usec.all'Length /= 0
 137       then
 138          if Pthread_Time_Slice_Sec.all'Length /= 0 then
 139             Val_Sec := Integer'Value (Pthread_Time_Slice_Sec.all);
 140          end if;
 141
 142          if Pthread_Time_Slice_Usec.all'Length /= 0 then
 143             Val_Usec := Integer'Value (Pthread_Time_Slice_Usec.all);
 144          end if;
 145
 146          return Duration (Val_Sec) + Duration (Val_Usec) / 1000.0;
 147       else
 148          return Default_Default_Time_Slice;
 149       end if;
 150
 151    exception
 152       when others =>
 153          return Default_Default_Time_Slice;
 154    end Default_Time_Slice;
 155
 156    ------------------------
 157    -- Default_Task_Stack --
 158    ------------------------
 159
 160    function Default_Task_Stack return Integer is
 161    begin
 162       return Default_Default_Task_Stack;
 163    end Default_Task_Stack;
 164
 165    -----------------------
 166    -- Stack_Guard_Pages --
 167    -----------------------
 168
 169    function Stack_Guard_Pages return Integer is
 170       Pthread_Stack_Guard_Pages : constant GNAT.OS_Lib.String_Access :=
 171         GNAT.OS_Lib.Getenv ("PTHREAD_STACK_GUARD_PAGES");
 172
 173    begin
 174       if Pthread_Stack_Guard_Pages.all'Length /= 0 then
 175          return Integer'Value (Pthread_Stack_Guard_Pages.all);
 176       else
 177          return Default_Stack_Guard_Pages;
 178       end if;
 179    exception
 180       when others =>
 181          return Default_Stack_Guard_Pages;
 182    end Stack_Guard_Pages;
 183
 184    --------------------------
 185    -- Pthread_Sched_Signal --
 186    --------------------------
 187
 188    function Pthread_Sched_Signal return Integer is
 189    begin
 190       return Default_Pthread_Sched_Signal;
 191    end Pthread_Sched_Signal;
 192
 193    ------------------------
 194    -- Pthread_Arena_Size --
 195    ------------------------
 196
 197    function Pthread_Arena_Size  return Integer is
 198       Pthread_Arena_Size : constant GNAT.OS_Lib.String_Access :=
 199         GNAT.OS_Lib.Getenv ("PTHREAD_ARENA_SIZE");
 200
 201    begin
 202       if Pthread_Arena_Size.all'Length = 0 then
 203          return Default_Pthread_Arena_Size;
 204       else
 205          return Integer'Value (Pthread_Arena_Size.all);
 206       end if;
 207    exception
 208       when others =>
 209          return Default_Pthread_Arena_Size;
 210    end Pthread_Arena_Size;
 211
 212    -------------------------
 213    -- Os_Default_Priority --
 214    -------------------------
 215
 216    function Os_Default_Priority return Integer is
 217    begin
 218       return Default_Os_Default_Priority;
 219    end Os_Default_Priority;
 220
 221 end System.Program_Info;