114 lines
3.1 KiB
C++
114 lines
3.1 KiB
C++
/*
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* Copyright (c) 2017, 2019, Red Hat, Inc. All rights reserved.
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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_SHENANDOAHSTRDEDUPQUEUE_HPP
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#define SHARE_GC_SHENANDOAH_SHENANDOAHSTRDEDUPQUEUE_HPP
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#include "gc/shared/stringdedup/stringDedup.hpp"
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#include "gc/shenandoah/shenandoahHeap.hpp"
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#include "oops/oop.hpp"
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template <uint buffer_size>
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class ShenandoahOopBuffer : public CHeapObj<mtGC> {
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private:
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oop _buf[buffer_size];
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uint _index;
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ShenandoahOopBuffer<buffer_size>* _next;
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public:
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ShenandoahOopBuffer();
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bool is_full() const;
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bool is_empty() const;
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uint size() const;
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void push(oop obj);
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oop pop();
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void reset();
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void set_next(ShenandoahOopBuffer<buffer_size>* next);
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ShenandoahOopBuffer<buffer_size>* next() const;
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void unlink_or_oops_do(StringDedupUnlinkOrOopsDoClosure* cl);
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void oops_do(OopClosure* cl);
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};
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typedef ShenandoahOopBuffer<64> ShenandoahQueueBuffer;
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// Muti-producer and single consumer queue set
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class ShenandoahStrDedupQueue : public StringDedupQueue {
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private:
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ShenandoahQueueBuffer** _producer_queues;
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ShenandoahQueueBuffer* _consumer_queue;
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size_t _num_producer_queue;
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// The queue is used for producers to publish completed buffers
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ShenandoahQueueBuffer* _published_queues;
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// Cached free buffers
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ShenandoahQueueBuffer* _free_list;
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size_t _num_free_buffer;
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const size_t _max_free_buffer;
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bool _cancel;
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// statistics
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size_t _total_buffers;
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private:
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~ShenandoahStrDedupQueue();
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public:
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ShenandoahStrDedupQueue();
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void wait_impl();
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void cancel_wait_impl();
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void push_impl(uint worker_id, oop string_oop);
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oop pop_impl();
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void unlink_or_oops_do_impl(StringDedupUnlinkOrOopsDoClosure* cl, size_t queue);
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void print_statistics_impl();
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void verify_impl();
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protected:
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size_t num_queues() const { return (_num_producer_queue + 2); }
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private:
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ShenandoahQueueBuffer* new_buffer();
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void release_buffers(ShenandoahQueueBuffer* list);
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ShenandoahQueueBuffer* queue_at(size_t queue_id) const;
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bool pop_candidate(oop& obj);
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void set_producer_buffer(ShenandoahQueueBuffer* buf, size_t queue_id);
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void verify(ShenandoahQueueBuffer* head);
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};
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#endif // SHARE_GC_SHENANDOAH_SHENANDOAHSTRDEDUPQUEUE_HPP
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