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) 1997-2009, 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 3,  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.                                     --
  17 --                                                                          --
  18 -- As a special exception under Section 7 of GPL version 3, you are granted --
  19 -- additional permissions described in the GCC Runtime Library Exception,   --
  20 -- version 3.1, as published by the Free Software Foundation.               --
  21 --                                                                          --
  22 -- You should have received a copy of the GNU General Public License and    --
  23 -- a copy of the GCC Runtime Library Exception along with this program;     --
  24 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  25 -- <http://www.gnu.org/licenses/>.                                          --
  26 --                                                                          --
  27 -- GNAT was originally developed  by the GNAT team at  New York University. --
  28 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  29 --                                                                          --
  30 ------------------------------------------------------------------------------
  31
  32 --  This is an Irix (old pthread library) version of this package
  33
  34 --  This package contains the parameters used by the run-time system at
  35 --  program startup. These parameters are isolated in this package body to
  36 --  facilitate replacement by the end user.
  37 --
  38 --  To replace the default values, copy this source file into your build
  39 --  directory, edit the file to reflect your desired behavior, and recompile
  40 --  with the command:
  41 --
  42 --     % gcc -c -O2 -gnatpg s-proinf.adb
  43 --
  44 --  then relink your application as usual.
  45
  46 pragma Warnings (Off); -- why???
  47 with System.OS_Lib;
  48 pragma Warnings (On);
  49
  50 package body System.Program_Info is
  51
  52    Kbytes : constant := 1024;
  53
  54    Default_Initial_Sproc_Count  : constant := 0;
  55    Default_Max_Sproc_Count      : constant := 128;
  56    Default_Sproc_Stack_Size     : constant := 16#4000#;
  57    Default_Stack_Guard_Pages    : constant := 1;
  58    Default_Default_Time_Slice   : constant := 0.0;
  59    Default_Default_Task_Stack   : constant := 12 * Kbytes;
  60    Default_Pthread_Sched_Signal : constant := 35;
  61    Default_Pthread_Arena_Size   : constant := 16#40000#;
  62    Default_Os_Default_Priority  : constant := 0;
  63
  64    -------------------------
  65    -- Initial_Sproc_Count --
  66    -------------------------
  67
  68    function Initial_Sproc_Count return Integer is
  69
  70       function sysmp (P1 : Integer) return Integer;
  71       pragma Import (C, sysmp, "sysmp", "sysmp");
  72
  73       MP_NPROCS : constant := 1; --   # processor in complex
  74
  75       Pthread_Sproc_Count : constant System.OS_Lib.String_Access :=
  76         System.OS_Lib.Getenv ("PTHREAD_SPROC_COUNT");
  77
  78    begin
  79       if Pthread_Sproc_Count.all'Length = 0 then
  80          return Default_Initial_Sproc_Count;
  81
  82       elsif Pthread_Sproc_Count.all = "AUTO" then
  83          return sysmp (MP_NPROCS);
  84
  85       else
  86          return Integer'Value (Pthread_Sproc_Count.all);
  87       end if;
  88
  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 System.OS_Lib.String_Access :=
 100         System.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 System.OS_Lib.String_Access :=
 128                                  System.OS_Lib.Getenv
 129                                    ("PTHREAD_TIME_SLICE_SEC");
 130       Pthread_Time_Slice_Usec : constant System.OS_Lib.String_Access :=
 131                                   System.OS_Lib.Getenv
 132                                     ("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 System.OS_Lib.String_Access :=
 173                                     System.OS_Lib.Getenv
 174                                       ("PTHREAD_STACK_GUARD_PAGES");
 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 System.OS_Lib.String_Access :=
 201                              System.OS_Lib.Getenv
 202                                ("PTHREAD_ARENA_SIZE");
 203
 204    begin
 205       if Pthread_Arena_Size.all'Length = 0 then
 206          return Default_Pthread_Arena_Size;
 207       else
 208          return Integer'Value (Pthread_Arena_Size.all);
 209       end if;
 210
 211    exception
 212       when others =>
 213          return Default_Pthread_Arena_Size;
 214    end Pthread_Arena_Size;
 215
 216    -------------------------
 217    -- Os_Default_Priority --
 218    -------------------------
 219
 220    function Os_Default_Priority return Integer is
 221    begin
 222       return Default_Os_Default_Priority;
 223    end Os_Default_Priority;
 224
 225 end System.Program_Info;