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 #include "gc_implementation/shenandoah/shenandoahHeap.hpp" 26 #include "gc_implementation/shenandoah/shenandoahWorkGroup.hpp" 27 #include "gc_implementation/shenandoah/shenandoahLogging.hpp" 28 29 ShenandoahWorkerScope::ShenandoahWorkerScope(ShenandoahWorkGang* workers, uint nworkers, const char* msg) : 30 _n_workers(nworkers), 31 _workers(workers) { 32 assert(msg != NULL, "Missing message"); 33 log_info(gc, task)("Using %u of %u workers for %s", 34 nworkers, ShenandoahHeap::heap()->max_workers(), msg); 35 36 ShenandoahHeap::heap()->assert_gc_workers(nworkers); 37 _workers->set_active_workers(nworkers); 38 } 39 40 ShenandoahWorkerScope::~ShenandoahWorkerScope() { 41 assert(_workers->active_workers() == _n_workers, 42 "Active workers can not be changed within this scope"); 43 } 44 45 ShenandoahPushWorkerScope::ShenandoahPushWorkerScope(ShenandoahWorkGang* workers, uint nworkers, bool check) : 46 _n_workers(nworkers), 47 _old_workers(workers->active_workers()), 48 _workers(workers) { 49 _workers->set_active_workers(nworkers); 50 51 // bypass concurrent/parallel protocol check for non-regular paths, e.g. verifier, etc. 52 if (check) { 53 ShenandoahHeap::heap()->assert_gc_workers(nworkers); 54 } 55 } 56 57 ShenandoahPushWorkerScope::~ShenandoahPushWorkerScope() { 58 assert(_workers->active_workers() == _n_workers, 59 "Active workers can not be changed within this scope"); 60 // Restore old worker value 61 _workers->set_active_workers(_old_workers); 62 }