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) 1997-2007, 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 pragma Warnings (Off); -- why???
  49 with System.OS_Lib;
  50 pragma Warnings (On);
  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 System.OS_Lib.String_Access :=
  78         System.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
  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 System.OS_Lib.String_Access :=
 102         System.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 System.OS_Lib.String_Access :=
 130                                  System.OS_Lib.Getenv
 131                                    ("PTHREAD_TIME_SLICE_SEC");
 132       Pthread_Time_Slice_Usec : constant System.OS_Lib.String_Access :=
 133                                   System.OS_Lib.Getenv
 134                                     ("PTHREAD_TIME_SLICE_USEC");
 135
 136       Val_Sec, Val_Usec : Integer := 0;
 137
 138    begin
 139       if Pthread_Time_Slice_Sec.all'Length /= 0 or
 140         Pthread_Time_Slice_Usec.all'Length /= 0
 141       then
 142          if Pthread_Time_Slice_Sec.all'Length /= 0 then
 143             Val_Sec := Integer'Value (Pthread_Time_Slice_Sec.all);
 144          end if;
 145
 146          if Pthread_Time_Slice_Usec.all'Length /= 0 then
 147             Val_Usec := Integer'Value (Pthread_Time_Slice_Usec.all);
 148          end if;
 149
 150          return Duration (Val_Sec) + Duration (Val_Usec) / 1000.0;
 151       else
 152          return Default_Default_Time_Slice;
 153       end if;
 154
 155    exception
 156       when others =>
 157          return Default_Default_Time_Slice;
 158    end Default_Time_Slice;
 159
 160    ------------------------
 161    -- Default_Task_Stack --
 162    ------------------------
 163
 164    function Default_Task_Stack return Integer is
 165    begin
 166       return Default_Default_Task_Stack;
 167    end Default_Task_Stack;
 168
 169    -----------------------
 170    -- Stack_Guard_Pages --
 171    -----------------------
 172
 173    function Stack_Guard_Pages return Integer is
 174       Pthread_Stack_Guard_Pages : constant System.OS_Lib.String_Access :=
 175                                     System.OS_Lib.Getenv
 176                                       ("PTHREAD_STACK_GUARD_PAGES");
 177    begin
 178       if Pthread_Stack_Guard_Pages.all'Length /= 0 then
 179          return Integer'Value (Pthread_Stack_Guard_Pages.all);
 180       else
 181          return Default_Stack_Guard_Pages;
 182       end if;
 183    exception
 184       when others =>
 185          return Default_Stack_Guard_Pages;
 186    end Stack_Guard_Pages;
 187
 188    --------------------------
 189    -- Pthread_Sched_Signal --
 190    --------------------------
 191
 192    function Pthread_Sched_Signal return Integer is
 193    begin
 194       return Default_Pthread_Sched_Signal;
 195    end Pthread_Sched_Signal;
 196
 197    ------------------------
 198    -- Pthread_Arena_Size --
 199    ------------------------
 200
 201    function Pthread_Arena_Size  return Integer is
 202       Pthread_Arena_Size : constant System.OS_Lib.String_Access :=
 203                              System.OS_Lib.Getenv
 204                                ("PTHREAD_ARENA_SIZE");
 205
 206    begin
 207       if Pthread_Arena_Size.all'Length = 0 then
 208          return Default_Pthread_Arena_Size;
 209       else
 210          return Integer'Value (Pthread_Arena_Size.all);
 211       end if;
 212
 213    exception
 214       when others =>
 215          return Default_Pthread_Arena_Size;
 216    end Pthread_Arena_Size;
 217
 218    -------------------------
 219    -- Os_Default_Priority --
 220    -------------------------
 221
 222    function Os_Default_Priority return Integer is
 223    begin
 224       return Default_Os_Default_Priority;
 225    end Os_Default_Priority;
 226
 227 end System.Program_Info;