libgomp/barrier.c

   1 /* Copyright (C) 2005-2017 Free Software Foundation, Inc.
   2    Contributed by Richard Henderson <rth@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 BARRIER construct.  */
  27
  28 #include "libgomp.h"
  29
  30
  31 void
  32 GOMP_barrier (void)
  33 {
  34   struct gomp_thread *thr = gomp_thread ();
  35   struct gomp_team *team = thr->ts.team;
  36
  37   /* It is legal to have orphaned barriers.  */
  38   if (team == NULL)
  39     return;
  40
  41   gomp_team_barrier_wait (&team->barrier);
  42 }
  43
  44 bool
  45 GOMP_barrier_cancel (void)
  46 {
  47   struct gomp_thread *thr = gomp_thread ();
  48   struct gomp_team *team = thr->ts.team;
  49
  50   /* The compiler transforms to barrier_cancel when it sees that the
  51      barrier is within a construct that can cancel.  Thus we should
  52      never have an orphaned cancellable barrier.  */
  53   return gomp_team_barrier_wait_cancel (&team->barrier);
  54 }