1 /* Copyright (C) 2021-2022 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 SCOPE construct with task reductions. */
27
28 #include "libgomp.h"
29 #include <string.h>
30
31
ialias_redirect(GOMP_taskgroup_reduction_register)32 ialias_redirect (GOMP_taskgroup_reduction_register)
33
34 /* This routine is called when first encountering a scope construct
35 with task reductions. While scope is not a work-sharing construct,
36 if it has task reductions on it, we treat it as one, but as if it is
37 nowait, so the work-sharing behavior is done solely to choose which
38 thread does the initial initialization of task reductions and which
39 threads follow. scope with task reductions must not be nowait,
40 but the barrier and GOMP_workshare_task_reduction_unregister are emitted
41 by the lowered code later. */
42
43 void
44 GOMP_scope_start (uintptr_t *reductions)
45 {
46 struct gomp_thread *thr = gomp_thread ();
47
48 gomp_workshare_taskgroup_start ();
49 if (gomp_work_share_start (0))
50 {
51 GOMP_taskgroup_reduction_register (reductions);
52 thr->task->taskgroup->workshare = true;
53 thr->ts.work_share->task_reductions = reductions;
54 gomp_work_share_init_done ();
55 }
56 else
57 {
58 uintptr_t *first_reductions = thr->ts.work_share->task_reductions;
59 gomp_workshare_task_reduction_register (reductions,
60 first_reductions);
61 }
62 }
63