libgomp/affinity.c

   1 /* Copyright (C) 2006-2023 Free Software Foundation, Inc.
   2    Contributed by Jakub Jelinek <jakub@redhat.com>.
   3
   4    This file is part of the GNU Offloading and Multi Processing Library
   5    (libgomp).
   6
   7    Libgomp is free software; you can redistribute it and/or modify it
   8    under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3, or (at your option)
  10    any later version.
  11
  12    Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
  13    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  14    FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15    more details.
  16
  17    Under Section 7 of GPL version 3, you are granted additional
  18    permissions described in the GCC Runtime Library Exception, version
  19    3.1, as published by the Free Software Foundation.
  20
  21    You should have received a copy of the GNU General Public License and
  22    a copy of the GCC Runtime Library Exception along with this program;
  23    see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24    <http://www.gnu.org/licenses/>.  */
  25
  26 /* This is a generic stub implementation of a CPU affinity setting.  */
  27
  28 #include "libgomp.h"
  29 #include <string.h>
  30 #include <stdio.h>
  31
  32 void
  33 gomp_init_affinity (void)
  34 {
  35 }
  36
  37 #ifdef LIBGOMP_USE_PTHREADS
  38 void
  39 gomp_init_thread_affinity (pthread_attr_t *attr, unsigned int place)
  40 {
  41   (void) attr;
  42   (void) place;
  43 }
  44 #endif
  45
  46 void **
  47 gomp_affinity_alloc (unsigned long count, bool quiet)
  48 {
  49   (void) count;
  50   if (!quiet)
  51     gomp_error ("Affinity not supported on this configuration");
  52   return NULL;
  53 }
  54
  55 void
  56 gomp_affinity_init_place (void *p)
  57 {
  58   (void) p;
  59 }
  60
  61 bool
  62 gomp_affinity_add_cpus (void *p, unsigned long num,
  63                         unsigned long len, long stride, bool quiet)
  64 {
  65   (void) p;
  66   (void) num;
  67   (void) len;
  68   (void) stride;
  69   (void) quiet;
  70   return false;
  71 }
  72
  73 bool
  74 gomp_affinity_remove_cpu (void *p, unsigned long num)
  75 {
  76   (void) p;
  77   (void) num;
  78   return false;
  79 }
  80
  81 bool
  82 gomp_affinity_copy_place (void *p, void *q, long stride)
  83 {
  84   (void) p;
  85   (void) q;
  86   (void) stride;
  87   return false;
  88 }
  89
  90 bool
  91 gomp_affinity_same_place (void *p, void *q)
  92 {
  93   (void) p;
  94   (void) q;
  95   return false;
  96 }
  97
  98 bool
  99 gomp_affinity_finalize_place_list (bool quiet)
 100 {
 101   (void) quiet;
 102   return false;
 103 }
 104
 105 bool
 106 gomp_affinity_init_level (int level, unsigned long count, bool quiet)
 107 {
 108   (void) level;
 109   (void) count;
 110   (void) quiet;
 111   if (!quiet)
 112     gomp_error ("Affinity not supported on this configuration");
 113   return NULL;
 114 }
 115
 116 void
 117 gomp_affinity_print_place (void *p)
 118 {
 119   (void) p;
 120 }
 121
 122 int
 123 omp_get_place_num_procs (int place_num)
 124 {
 125   (void) place_num;
 126   return 0;
 127 }
 128
 129 void
 130 omp_get_place_proc_ids (int place_num, int *ids)
 131 {
 132   (void) place_num;
 133   (void) ids;
 134 }
 135
 136 void
 137 gomp_get_place_proc_ids_8 (int place_num, int64_t *ids)
 138 {
 139   (void) place_num;
 140   (void) ids;
 141 }
 142
 143 void
 144 gomp_display_affinity_place (char *buffer, size_t size, size_t *ret,
 145                              int place)
 146 {
 147   char buf[sizeof (long) * 3 + 4];
 148   if (gomp_available_cpus > 1)
 149     sprintf (buf, "0-%lu", gomp_available_cpus - 1);
 150   else
 151     strcpy (buf, "0");
 152   gomp_display_string (buffer, size, ret, buf, strlen (buf));
 153 }
 154
 155 ialias(omp_get_place_num_procs)
 156 ialias(omp_get_place_proc_ids)