diff options
Diffstat (limited to 'gcc-4.3.1/libgomp/config/linux/affinity.c')
| -rw-r--r-- | gcc-4.3.1/libgomp/config/linux/affinity.c | 107 |
1 files changed, 0 insertions, 107 deletions
diff --git a/gcc-4.3.1/libgomp/config/linux/affinity.c b/gcc-4.3.1/libgomp/config/linux/affinity.c deleted file mode 100644 index 8fcce5f3a..000000000 --- a/gcc-4.3.1/libgomp/config/linux/affinity.c +++ /dev/null @@ -1,107 +0,0 @@ -/* Copyright (C) 2006, 2007 Free Software Foundation, Inc. - Contributed by Jakub Jelinek <jakub@redhat.com>. - - This file is part of the GNU OpenMP Library (libgomp). - - Libgomp is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY - WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS - FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for - more details. - - You should have received a copy of the GNU Lesser General Public License - along with libgomp; see the file COPYING.LIB. If not, write to the - Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, - MA 02110-1301, USA. */ - -/* As a special exception, if you link this library with other files, some - of which are compiled with GCC, to produce an executable, this library - 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 - General Public License. */ - -/* This is a Linux specific implementation of a CPU affinity setting. */ - -#ifndef _GNU_SOURCE -#define _GNU_SOURCE 1 -#endif -#include "libgomp.h" -#include <sched.h> -#include <stdlib.h> -#include <unistd.h> - -#ifdef HAVE_PTHREAD_AFFINITY_NP - -static unsigned int affinity_counter; -#ifndef HAVE_SYNC_BUILTINS -static gomp_mutex_t affinity_lock; -#endif - -void -gomp_init_affinity (void) -{ - cpu_set_t cpuset; - size_t idx, widx; - - if (pthread_getaffinity_np (pthread_self (), sizeof (cpuset), &cpuset)) - { - gomp_error ("could not get CPU affinity set"); - free (gomp_cpu_affinity); - gomp_cpu_affinity = NULL; - gomp_cpu_affinity_len = 0; - return; - } - - for (widx = idx = 0; idx < gomp_cpu_affinity_len; idx++) - if (gomp_cpu_affinity[idx] < CPU_SETSIZE - && CPU_ISSET (gomp_cpu_affinity[idx], &cpuset)) - gomp_cpu_affinity[widx++] = gomp_cpu_affinity[idx]; - - if (widx == 0) - { - gomp_error ("no CPUs left for affinity setting"); - free (gomp_cpu_affinity); - gomp_cpu_affinity = NULL; - gomp_cpu_affinity_len = 0; - return; - } - - gomp_cpu_affinity_len = widx; - CPU_ZERO (&cpuset); - CPU_SET (gomp_cpu_affinity[0], &cpuset); - pthread_setaffinity_np (pthread_self (), sizeof (cpuset), &cpuset); - affinity_counter = 1; -#ifndef HAVE_SYNC_BUILTINS - gomp_mutex_init (&affinity_lock); -#endif -} - -void -gomp_init_thread_affinity (pthread_attr_t *attr) -{ - unsigned int cpu; - cpu_set_t cpuset; - -#ifdef HAVE_SYNC_BUILTINS - cpu = __sync_fetch_and_add (&affinity_counter, 1); -#else - gomp_mutex_lock (&affinity_lock); - cpu = affinity_counter++; - gomp_mutex_unlock (&affinity_lock); -#endif - cpu %= gomp_cpu_affinity_len; - CPU_ZERO (&cpuset); - CPU_SET (gomp_cpu_affinity[cpu], &cpuset); - pthread_attr_setaffinity_np (attr, sizeof (cpu_set_t), &cpuset); -} - -#else - -#include "../posix/affinity.c" - -#endif |
