92 lines
3.2 KiB
C++
92 lines
3.2 KiB
C++
/*
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* Copyright (c) 2017, 2019, Red Hat, Inc. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#ifndef SHARE_GC_SHENANDOAH_SHENANDOAHWORKGROUP_HPP
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#define SHARE_GC_SHENANDOAH_SHENANDOAHWORKGROUP_HPP
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#include "gc/shared/workgroup.hpp"
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#include "gc/shenandoah/shenandoahTaskqueue.hpp"
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#include "memory/allocation.hpp"
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class ShenandoahObjToScanQueueSet;
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class ShenandoahWorkerScope : public StackObj {
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private:
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uint _n_workers;
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WorkGang* _workers;
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public:
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ShenandoahWorkerScope(WorkGang* workers, uint nworkers, const char* msg, bool do_check = true);
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~ShenandoahWorkerScope();
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};
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class ShenandoahPushWorkerScope : StackObj {
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protected:
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uint _n_workers;
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uint _old_workers;
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WorkGang* _workers;
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public:
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ShenandoahPushWorkerScope(WorkGang* workers, uint nworkers, bool do_check = true);
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~ShenandoahPushWorkerScope();
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};
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class ShenandoahPushWorkerQueuesScope : public ShenandoahPushWorkerScope {
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private:
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ShenandoahObjToScanQueueSet* _queues;
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public:
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ShenandoahPushWorkerQueuesScope(WorkGang* workers, ShenandoahObjToScanQueueSet* queues, uint nworkers, bool do_check = true);
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~ShenandoahPushWorkerQueuesScope();
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};
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class ShenandoahWorkGang : public WorkGang {
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private:
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bool _initialize_gclab;
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public:
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ShenandoahWorkGang(const char* name,
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uint workers,
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bool are_GC_task_threads,
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bool are_ConcurrentGC_threads) :
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WorkGang(name, workers, are_GC_task_threads, are_ConcurrentGC_threads), _initialize_gclab(false) {
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}
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// Create a GC worker and install it into the work gang.
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// We need to initialize gclab for dynamic allocated workers
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AbstractGangWorker* install_worker(uint which);
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// We allow _active_workers < _total_workers when UseDynamicNumberOfGCThreads is off.
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// We use the same WorkGang for concurrent and parallel processing, and honor
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// ConcGCThreads and ParallelGCThreads settings
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virtual uint active_workers() const {
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assert(_active_workers > 0, "no active worker");
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assert(_active_workers <= _total_workers,
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"_active_workers: %u > _total_workers: %u", _active_workers, _total_workers);
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return _active_workers;
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}
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void set_initialize_gclab() { assert(!_initialize_gclab, "Can only enable once"); _initialize_gclab = true; }
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};
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#endif // SHARE_GC_SHENANDOAH_SHENANDOAHWORKGROUP_HPP
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