text: /*
   * Copyright (c) 2017, 2021, Red Hat, Inc. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
   *
   * This code is distributed in the hope that it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   * version 2 for more details (a copy is included in the LICENSE file that
   * accompanied this code).
   *
   * You should have received a copy of the GNU General Public License version
   * 2 along with this work; if not, write to the Free Software Foundation,
   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
   * or visit www.oracle.com if you need additional information or have any
   * questions.
   *
   */
  
  #ifndef SHARE_GC_SHENANDOAH_SHENANDOAHWORKGROUP_HPP
  #define SHARE_GC_SHENANDOAH_SHENANDOAHWORKGROUP_HPP
  
  #include "gc/shared/workgroup.hpp"
  #include "gc/shenandoah/shenandoahTaskqueue.hpp"
  #include "memory/allocation.hpp"
  
  class ShenandoahObjToScanQueueSet;
  
  class ShenandoahWorkerScope : public StackObj {
  private:
    uint      _n_workers;
    WorkGang* _workers;
  public:
    ShenandoahWorkerScope(WorkGang* workers, uint nworkers, const char* msg, bool do_check = true);
    ~ShenandoahWorkerScope();
  };
  
  class ShenandoahPushWorkerScope : StackObj {
  protected:
    uint      _n_workers;
    uint      _old_workers;
    WorkGang* _workers;
  
  public:
    ShenandoahPushWorkerScope(WorkGang* workers, uint nworkers, bool do_check = true);
    ~ShenandoahPushWorkerScope();
  };
  
  class ShenandoahWorkGang : public WorkGang {
  private:
    bool     _initialize_gclab;
  public:
    ShenandoahWorkGang(const char* name,
             uint workers,
             bool are_GC_task_threads,
             bool are_ConcurrentGC_threads) :
      WorkGang(name, workers, are_GC_task_threads, are_ConcurrentGC_threads), _initialize_gclab(false) {
      }
  
    // Create a GC worker and install it into the work gang.
    // We need to initialize gclab for dynamic allocated workers
    GangWorker* install_worker(uint which);
  
    void set_initialize_gclab() { assert(!_initialize_gclab, "Can only enable once"); _initialize_gclab = true; }
  };
  
  #endif // SHARE_GC_SHENANDOAH_SHENANDOAHWORKGROUP_HPP
  