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/shenandoahWorkGroup.hpp"
  27 
  28 ShenandoahWorkerScope::ShenandoahWorkerScope(WorkGang* workers, uint nworkers) :
  29   _workers(workers), _n_workers(nworkers) {
  30   _workers->update_active_workers(nworkers);
  31 }
  32 
  33 ShenandoahWorkerScope::~ShenandoahWorkerScope() {
  34   assert(_workers->active_workers() == _n_workers,
  35     "Active workers can not be changed within this scope");
  36 }
  37 
  38 ShenandoahPushWorkerScope::ShenandoahPushWorkerScope(WorkGang* workers, uint nworkers) :
  39   _workers(workers), _old_workers(workers->active_workers()), _n_workers(nworkers) {
  40   _workers->update_active_workers(nworkers);
  41 }
  42 
  43 ShenandoahPushWorkerScope::~ShenandoahPushWorkerScope() {
  44   assert(_workers->active_workers() == _n_workers,
  45     "Active workers can not be changed within this scope");
  46   // Restore old worker value
  47   _workers->update_active_workers(_old_workers);
  48 }
  49 
  50 AbstractGangWorker* ShenandoahWorkGang::install_worker(uint which) {
  51   AbstractGangWorker* worker = WorkGang::install_worker(which);
  52   if (_initialize_gclab) {
  53     worker->gclab().initialize(true);
  54   }
  55 
  56   return worker;
  57 }