1 /* 2 * Copyright (c) 2017, Red Hat, Inc. and/or its affiliates. 3 * 4 * This code is free software; you can redistribute it and/or modify it 5 * under the terms of the GNU General Public License version 2 only, as 6 * published by the Free Software Foundation. 7 * 8 * This code is distributed in the hope that it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 11 * version 2 for more details (a copy is included in the LICENSE file that 12 * accompanied this code). 13 * 14 * You should have received a copy of the GNU General Public License version 15 * 2 along with this work; if not, write to the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 17 * 18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 19 * or visit www.oracle.com if you need additional information or have any 20 * questions. 21 * 22 */ 23 24 #include "precompiled.hpp" 25 26 #include "gc/shenandoah/shenandoahHeap.hpp" 27 #include "gc/shenandoah/shenandoahWorkGroup.hpp" 28 29 ShenandoahWorkerScope::ShenandoahWorkerScope(WorkGang* workers, uint nworkers) : 30 _workers(workers), _n_workers(nworkers) { 31 ShenandoahHeap::heap()->assert_gc_workers(nworkers); 32 _workers->update_active_workers(nworkers); 33 } 34 35 ShenandoahWorkerScope::~ShenandoahWorkerScope() { 36 assert(_workers->active_workers() == _n_workers, 37 "Active workers can not be changed within this scope"); 38 } 39 40 ShenandoahPushWorkerScope::ShenandoahPushWorkerScope(WorkGang* workers, uint nworkers, bool check) : 41 _workers(workers), _old_workers(workers->active_workers()), _n_workers(nworkers) { 42 _workers->update_active_workers(nworkers); 43 44 // bypass concurrent/parallel protocol check for non-regular paths, e.g. verifier, etc. 45 if (!check) { 46 ShenandoahHeap::heap()->assert_gc_workers(nworkers); 47 } 48 } 49 50 ShenandoahPushWorkerScope::~ShenandoahPushWorkerScope() { 51 assert(_workers->active_workers() == _n_workers, 52 "Active workers can not be changed within this scope"); 53 // Restore old worker value 54 _workers->update_active_workers(_old_workers); 55 } 56 57 AbstractGangWorker* ShenandoahWorkGang::install_worker(uint which) { 58 AbstractGangWorker* worker = WorkGang::install_worker(which); 59 if (_initialize_gclab) { 60 ShenandoahHeap::heap()->initialize_gclab(worker); 61 } 62 63 return worker; 64 }