From b41ab480565d08ba5535f219e9f607e15d9c47e0 Mon Sep 17 00:00:00 2001 From: Pascal Obry Date: Thu, 13 Dec 2007 11:18:44 +0100 Subject: adaint.c (__gnat_pthread_setaffinity_np): New routine. 2007-12-06 Pascal Obry * adaint.c (__gnat_pthread_setaffinity_np): New routine. A dummy version is provided for older GNU/Linux distribution not supporting thread affinity sets. * s-osinte-linux.ads (SC_NPROCESSORS_ONLN): New constant for sysconf call. (bit_field): New packed boolean type used by cpu_set_t. (cpu_set_t): New type corresponding to the C type with the same name. Note that on the Ada side we use a bit field array for the affinity mask. There is not need for the C macro for setting individual bit. (pthread_setaffinity_np): New imported routine. * s-taprop-linux.adb (Enter_Task): Check that the CPU affinity mask is no null. (Create_Task): Set the processor affinity mask if information is present. * s-tasinf-linux.ads, s-tasinf-linux.adb: New files. From-SVN: r130812 --- gcc/ada/s-tasinf-linux.adb | 57 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 gcc/ada/s-tasinf-linux.adb (limited to 'gcc/ada/s-tasinf-linux.adb') diff --git a/gcc/ada/s-tasinf-linux.adb b/gcc/ada/s-tasinf-linux.adb new file mode 100644 index 0000000..0510a63 --- /dev/null +++ b/gcc/ada/s-tasinf-linux.adb @@ -0,0 +1,57 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- S Y S T E M . T A S K _ I N F O -- +-- -- +-- B o d y -- +-- -- +-- Copyright (C) 2007, 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, 51 Franklin Street, Fifth Floor, -- +-- Boston, MA 02110-1301, 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. -- +-- Extensive contributions were provided by Ada Core Technologies Inc. -- +-- -- +------------------------------------------------------------------------------ + +-- This is the GNU/Linux version of this module + +package body System.Task_Info is + + N_CPU : Natural := 0; + pragma Atomic (N_CPU); + -- Cache CPU number. Use pragma Atomic to avoid a race condition when + -- setting N_CPU in Number_Of_Processors below. + + -------------------------- + -- Number_Of_Processors -- + -------------------------- + + function Number_Of_Processors return Positive is + begin + if N_CPU = 0 then + N_CPU := Natural + (OS_Interface.sysconf (OS_Interface.SC_NPROCESSORS_ONLN)); + end if; + + return N_CPU; + end Number_Of_Processors; + +end System.Task_Info; -- cgit v1.1