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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- S Y S T E M . P R O G R A M _ I N F O --
-- --
-- S p e c --
-- --
-- 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 package contains the definitions and routines used as parameters to
-- the run-time system at program startup for the SGI implementation.
package System.Program_Info is
pragma Preelaborate;
function Initial_Sproc_Count return Integer;
-- The number of sproc created at program startup for scheduling threads
function Max_Sproc_Count return Integer;
-- The maximum number of sprocs that can be created by the program for
-- servicing threads. This limit includes both the pre-created sprocs and
-- those explicitly created under program control.
function Sproc_Stack_Size return Integer;
-- The size, in bytes, of the sproc's initial stack
function Default_Time_Slice return Duration;
-- The default time quanta for round-robin scheduling of threads of
-- equal priority. This default value can be overridden on a per-task
-- basis by specifying an alternate value via the implementation-defined
-- Task_Info pragma. See s-tasinf.ads for more information.
function Default_Task_Stack return Integer;
-- The default stack size for each created thread. This default value can
-- be overridden on a per-task basis by the language-defined Storage_Size
-- pragma.
function Stack_Guard_Pages return Integer;
-- The number of non-writable, guard pages to append to the bottom of
-- each thread's stack.
function Pthread_Sched_Signal return Integer;
-- The signal used by the Pthreads library to affect scheduling actions
-- in remote sprocs.
function Pthread_Arena_Size return Integer;
-- The size of the shared arena from which pthread locks are allocated.
-- See the usinit(3p) man page for more information on shared arenas.
function Os_Default_Priority return Integer;
-- The default Irix Non-Degrading priority for each sproc created to
-- service threads.
end System.Program_Info;
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