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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- S Y S T E M . P R O G R A M _ I N F O --
-- --
-- B o d y --
-- --
-- Copyright (C) 1997-2009, Free Software Foundation, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 3, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception, --
-- version 3.1, as published by the Free Software Foundation. --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
-- This is an Irix (old pthread library) version of this package
-- This package contains the parameters used by the run-time system at
-- program startup. These parameters are isolated in this package body to
-- facilitate replacement by the end user.
--
-- To replace the default values, copy this source file into your build
-- directory, edit the file to reflect your desired behavior, and recompile
-- with the command:
--
-- % gcc -c -O2 -gnatpg s-proinf.adb
--
-- then relink your application as usual.
pragma Warnings (Off); -- why???
with System.OS_Lib;
pragma Warnings (On);
package body System.Program_Info is
Kbytes : constant := 1024;
Default_Initial_Sproc_Count : constant := 0;
Default_Max_Sproc_Count : constant := 128;
Default_Sproc_Stack_Size : constant := 16#4000#;
Default_Stack_Guard_Pages : constant := 1;
Default_Default_Time_Slice : constant := 0.0;
Default_Default_Task_Stack : constant := 12 * Kbytes;
Default_Pthread_Sched_Signal : constant := 35;
Default_Pthread_Arena_Size : constant := 16#40000#;
Default_Os_Default_Priority : constant := 0;
-------------------------
-- Initial_Sproc_Count --
-------------------------
function Initial_Sproc_Count return Integer is
function sysmp (P1 : Integer) return Integer;
pragma Import (C, sysmp, "sysmp", "sysmp");
MP_NPROCS : constant := 1; -- # processor in complex
Pthread_Sproc_Count : constant System.OS_Lib.String_Access :=
System.OS_Lib.Getenv ("PTHREAD_SPROC_COUNT");
begin
if Pthread_Sproc_Count.all'Length = 0 then
return Default_Initial_Sproc_Count;
elsif Pthread_Sproc_Count.all = "AUTO" then
return sysmp (MP_NPROCS);
else
return Integer'Value (Pthread_Sproc_Count.all);
end if;
exception
when others =>
return Default_Initial_Sproc_Count;
end Initial_Sproc_Count;
---------------------
-- Max_Sproc_Count --
---------------------
function Max_Sproc_Count return Integer is
Pthread_Max_Sproc_Count : constant System.OS_Lib.String_Access :=
System.OS_Lib.Getenv ("PTHREAD_MAX_SPROC_COUNT");
begin
if Pthread_Max_Sproc_Count.all'Length = 0 then
return Default_Max_Sproc_Count;
else
return Integer'Value (Pthread_Max_Sproc_Count.all);
end if;
exception
when others =>
return Default_Max_Sproc_Count;
end Max_Sproc_Count;
----------------------
-- Sproc_Stack_Size --
----------------------
function Sproc_Stack_Size return Integer is
begin
return Default_Sproc_Stack_Size;
end Sproc_Stack_Size;
------------------------
-- Default_Time_Slice --
------------------------
function Default_Time_Slice return Duration is
Pthread_Time_Slice_Sec : constant System.OS_Lib.String_Access :=
System.OS_Lib.Getenv
("PTHREAD_TIME_SLICE_SEC");
Pthread_Time_Slice_Usec : constant System.OS_Lib.String_Access :=
System.OS_Lib.Getenv
("PTHREAD_TIME_SLICE_USEC");
Val_Sec, Val_Usec : Integer := 0;
begin
if Pthread_Time_Slice_Sec.all'Length /= 0 or
Pthread_Time_Slice_Usec.all'Length /= 0
then
if Pthread_Time_Slice_Sec.all'Length /= 0 then
Val_Sec := Integer'Value (Pthread_Time_Slice_Sec.all);
end if;
if Pthread_Time_Slice_Usec.all'Length /= 0 then
Val_Usec := Integer'Value (Pthread_Time_Slice_Usec.all);
end if;
return Duration (Val_Sec) + Duration (Val_Usec) / 1000.0;
else
return Default_Default_Time_Slice;
end if;
exception
when others =>
return Default_Default_Time_Slice;
end Default_Time_Slice;
------------------------
-- Default_Task_Stack --
------------------------
function Default_Task_Stack return Integer is
begin
return Default_Default_Task_Stack;
end Default_Task_Stack;
-----------------------
-- Stack_Guard_Pages --
-----------------------
function Stack_Guard_Pages return Integer is
Pthread_Stack_Guard_Pages : constant System.OS_Lib.String_Access :=
System.OS_Lib.Getenv
("PTHREAD_STACK_GUARD_PAGES");
begin
if Pthread_Stack_Guard_Pages.all'Length /= 0 then
return Integer'Value (Pthread_Stack_Guard_Pages.all);
else
return Default_Stack_Guard_Pages;
end if;
exception
when others =>
return Default_Stack_Guard_Pages;
end Stack_Guard_Pages;
--------------------------
-- Pthread_Sched_Signal --
--------------------------
function Pthread_Sched_Signal return Integer is
begin
return Default_Pthread_Sched_Signal;
end Pthread_Sched_Signal;
------------------------
-- Pthread_Arena_Size --
------------------------
function Pthread_Arena_Size return Integer is
Pthread_Arena_Size : constant System.OS_Lib.String_Access :=
System.OS_Lib.Getenv
("PTHREAD_ARENA_SIZE");
begin
if Pthread_Arena_Size.all'Length = 0 then
return Default_Pthread_Arena_Size;
else
return Integer'Value (Pthread_Arena_Size.all);
end if;
exception
when others =>
return Default_Pthread_Arena_Size;
end Pthread_Arena_Size;
-------------------------
-- Os_Default_Priority --
-------------------------
function Os_Default_Priority return Integer is
begin
return Default_Os_Default_Priority;
end Os_Default_Priority;
end System.Program_Info;
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