1 /*
2 * Copyright (c) 2001, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
491 if (_claims != NULL) {
492 FREE_C_HEAP_ARRAY(uint, _claims);
493 }
494 }
495
496 uint HeapRegionClaimer::start_region_for_worker(uint worker_id) const {
497 assert(worker_id < _n_workers, "Invalid worker_id.");
498 return _n_regions * worker_id / _n_workers;
499 }
500
501 bool HeapRegionClaimer::is_region_claimed(uint region_index) const {
502 assert(region_index < _n_regions, "Invalid index.");
503 return _claims[region_index] == Claimed;
504 }
505
506 bool HeapRegionClaimer::claim_region(uint region_index) {
507 assert(region_index < _n_regions, "Invalid index.");
508 uint old_val = Atomic::cmpxchg(Claimed, &_claims[region_index], Unclaimed);
509 return old_val == Unclaimed;
510 }
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1 /*
2 * Copyright (c) 2001, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
491 if (_claims != NULL) {
492 FREE_C_HEAP_ARRAY(uint, _claims);
493 }
494 }
495
496 uint HeapRegionClaimer::start_region_for_worker(uint worker_id) const {
497 assert(worker_id < _n_workers, "Invalid worker_id.");
498 return _n_regions * worker_id / _n_workers;
499 }
500
501 bool HeapRegionClaimer::is_region_claimed(uint region_index) const {
502 assert(region_index < _n_regions, "Invalid index.");
503 return _claims[region_index] == Claimed;
504 }
505
506 bool HeapRegionClaimer::claim_region(uint region_index) {
507 assert(region_index < _n_regions, "Invalid index.");
508 uint old_val = Atomic::cmpxchg(Claimed, &_claims[region_index], Unclaimed);
509 return old_val == Unclaimed;
510 }
511
512 void G1ParallelizeByRegionsTask::all_heap_regions_work(HeapRegionClosure* cl,
513 uint worker_id,
514 bool concurrent) {
515 G1CollectedHeap* g1h = G1CollectedHeap::heap();
516 g1h->heap_region_par_iterate(cl, worker_id, &_hrclaimer, concurrent);
517 }
518
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