libgomp/teams.c

   1 /* Copyright (C) 2018-2021 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 file handles the host TEAMS construct.  */
  27
  28 #include "libgomp.h"
  29 #include <limits.h>
  30
  31 void
  32 GOMP_teams_reg (void (*fn) (void *), void *data, unsigned int num_teams,
  33                 unsigned int thread_limit, unsigned int flags)
  34 {
  35   struct gomp_thread *thr = gomp_thread ();
  36   (void) flags;
  37   unsigned old_thread_limit_var = 0;
  38   if (thread_limit == 0)
  39     thread_limit = gomp_teams_thread_limit_var;
  40   if (thread_limit)
  41     {
  42       struct gomp_task_icv *icv = gomp_icv (true);
  43       old_thread_limit_var = icv->thread_limit_var;
  44       icv->thread_limit_var
  45         = thread_limit > INT_MAX ? UINT_MAX : thread_limit;
  46     }
  47   if (num_teams == 0)
  48     num_teams = gomp_nteams_var ? gomp_nteams_var : 3;
  49   thr->num_teams = num_teams - 1;
  50   for (thr->team_num = 0; thr->team_num < num_teams; thr->team_num++)
  51     fn (data);
  52   thr->num_teams = 0;
  53   thr->team_num = 0;
  54   if (thread_limit)
  55     {
  56       struct gomp_task_icv *icv = gomp_icv (true);
  57       icv->thread_limit_var = old_thread_limit_var;
  58     }
  59 }
  60
  61 int
  62 omp_get_num_teams (void)
  63 {
  64   struct gomp_thread *thr = gomp_thread ();
  65   return thr->num_teams + 1;
  66 }
  67
  68 int
  69 omp_get_team_num (void)
  70 {
  71   struct gomp_thread *thr = gomp_thread ();
  72   return thr->team_num;
  73 }
  74
  75 ialias (omp_get_num_teams)
  76 ialias (omp_get_team_num)