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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 --
-- --
-- $Revision: 1.2 $ --
-- --
-- Copyright (C) 1996 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 2, 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. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
-- Public License distributed with GNAT; see file COPYING. If not, write --
-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
-- MA 02111-1307, USA. --
-- --
-- As a special exception, if other files instantiate generics from this --
-- unit, or you link this unit with other files to produce an executable, --
-- this unit does not by itself cause the resulting executable to be --
-- covered by the GNU General Public License. This exception does not --
-- however invalidate any other reasons why the executable file might be --
-- covered by the GNU Public License. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
-- --
------------------------------------------------------------------------------
-- 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 repalce 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 -gnatg s-proinf.adb
--
-- then relink your application as usual.
--
with Interfaces.C.Strings;
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 := 33;
Default_Pthread_Arena_Size : constant := 16#40000#;
Default_Os_Default_Priority : constant := 0;
use Interfaces.C.Strings;
function Getenv (Name : String) return String;
function Getenv (Name : String) return String is
function C_Getenv (P1 : chars_ptr) return chars_ptr;
pragma Import (C, C_Getenv, "getenv", "getenv");
Result : chars_ptr;
C_P1 : chars_ptr := New_String (Name);
begin
Result := C_Getenv (C_P1);
Free (C_P1);
if Result = Null_Ptr then
return "";
else
return Value (Result);
end if;
end Getenv;
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_STR : constant String
:= Getenv ("PTHREAD_SPROC_COUNT");
begin
if PTHREAD_SPROC_COUNT_STR = "" then
return Default_Initial_Sproc_Count;
elsif PTHREAD_SPROC_COUNT_STR'Length >= 4 and then
PTHREAD_SPROC_COUNT_STR (1 .. 4) = "AUTO" then
return sysmp (MP_NPROCS);
else
return Integer'Value (PTHREAD_SPROC_COUNT_STR);
end if;
exception
when others => return 0;
end Initial_Sproc_Count;
function Max_Sproc_Count return Integer is
PTHREAD_MAX_SPROC_COUNT_STR : constant String
:= Getenv ("PTHREAD_MAX_SPROC_COUNT");
begin
if PTHREAD_MAX_SPROC_COUNT_STR = "" then
return Default_Max_Sproc_Count;
else
return Integer'Value (PTHREAD_MAX_SPROC_COUNT_STR);
end if;
exception
when others =>
return Integer'Value (PTHREAD_MAX_SPROC_COUNT_STR);
end Max_Sproc_Count;
function Sproc_Stack_Size return Integer is
begin
return Default_Sproc_Stack_Size;
end Sproc_Stack_Size;
function Default_Time_Slice return Duration is
PTHREAD_TIME_SLICE_USEC_STR : constant String
:= Getenv ("PTHREAD_TIME_SLICE_USEC");
PTHREAD_TIME_SLICE_SEC_STR : constant String
:= Getenv ("PTHREAD_TIME_SLICE_SEC");
Time_Slice : Duration := 0.0;
begin
if PTHREAD_TIME_SLICE_USEC_STR /= "" or
PTHREAD_TIME_SLICE_SEC_STR /= "" then
if PTHREAD_TIME_SLICE_SEC_STR /= "" then
Time_Slice := Time_Slice +
Duration (Integer'Value (PTHREAD_TIME_SLICE_SEC_STR));
end if;
if PTHREAD_TIME_SLICE_USEC_STR /= "" then
Time_Slice := Time_Slice +
Duration (Integer'Value (PTHREAD_TIME_SLICE_SEC_STR)) / 1000.0;
end if;
return Time_Slice;
else
return Default_Default_Time_Slice;
end if;
exception
when others =>
return Default_Default_Time_Slice;
end Default_Time_Slice;
function Default_Task_Stack return Integer is
begin
return Default_Default_Task_Stack;
end Default_Task_Stack;
function Stack_Guard_Pages return Integer is
PTHREAD_STACK_GUARD_PAGES_STR : constant String
:= Getenv ("PTHREAD_STACK_GUARD_PAGES");
begin
if PTHREAD_STACK_GUARD_PAGES_STR /= "" then
return Integer'Value (PTHREAD_STACK_GUARD_PAGES_STR);
else
return Default_Stack_Guard_Pages;
end if;
exception
when others =>
return Default_Stack_Guard_Pages;
end Stack_Guard_Pages;
function Pthread_Sched_Signal return Integer is
begin
return Default_Pthread_Sched_Signal;
end Pthread_Sched_Signal;
function Pthread_Arena_Size return Integer is
PTHREAD_ARENA_SIZE_STR : constant String
:= Getenv ("PTHREAD_ARENA_SIZE");
begin
if PTHREAD_ARENA_SIZE_STR = "" then
return Default_Pthread_Arena_Size;
else
return Integer'Value (PTHREAD_ARENA_SIZE_STR);
end if;
exception
when others =>
return Default_Pthread_Arena_Size;
end Pthread_Arena_Size;
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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