| /* Copyright (C) 2005 Free Software Foundation, Inc. |
| Contributed by Richard Henderson <rth@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 file handles the SINGLE construct. */ |
| |
| #include "libgomp.h" |
| |
| |
| /* This routine is called when first encountering a SINGLE construct that |
| doesn't have a COPYPRIVATE clause. Returns true if this is the thread |
| that should execute the clause. */ |
| |
| bool |
| GOMP_single_start (void) |
| { |
| bool ret = gomp_work_share_start (false); |
| gomp_mutex_unlock (&gomp_thread ()->ts.work_share->lock); |
| gomp_work_share_end_nowait (); |
| return ret; |
| } |
| |
| /* This routine is called when first encountering a SINGLE construct that |
| does have a COPYPRIVATE clause. Returns NULL if this is the thread |
| that should execute the clause; otherwise the return value is pointer |
| given to GOMP_single_copy_end by the thread that did execute the clause. */ |
| |
| void * |
| GOMP_single_copy_start (void) |
| { |
| struct gomp_thread *thr = gomp_thread (); |
| |
| bool first; |
| void *ret; |
| |
| first = gomp_work_share_start (false); |
| gomp_mutex_unlock (&thr->ts.work_share->lock); |
| |
| if (first) |
| ret = NULL; |
| else |
| { |
| gomp_barrier_wait (&thr->ts.team->barrier); |
| |
| ret = thr->ts.work_share->copyprivate; |
| gomp_work_share_end_nowait (); |
| } |
| |
| return ret; |
| } |
| |
| /* This routine is called when the thread that entered a SINGLE construct |
| with a COPYPRIVATE clause gets to the end of the construct. */ |
| |
| void |
| GOMP_single_copy_end (void *data) |
| { |
| struct gomp_thread *thr = gomp_thread (); |
| struct gomp_team *team = thr->ts.team; |
| |
| if (team != NULL) |
| { |
| thr->ts.work_share->copyprivate = data; |
| gomp_barrier_wait (&team->barrier); |
| } |
| |
| gomp_work_share_end_nowait (); |
| } |