pliden@6413: /*
pliden@6413:  * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
pliden@6413:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
pliden@6413:  *
pliden@6413:  * This code is free software; you can redistribute it and/or modify it
pliden@6413:  * under the terms of the GNU General Public License version 2 only, as
pliden@6413:  * published by the Free Software Foundation.
pliden@6413:  *
pliden@6413:  * This code is distributed in the hope that it will be useful, but WITHOUT
pliden@6413:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
pliden@6413:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
pliden@6413:  * version 2 for more details (a copy is included in the LICENSE file that
pliden@6413:  * accompanied this code).
pliden@6413:  *
pliden@6413:  * You should have received a copy of the GNU General Public License version
pliden@6413:  * 2 along with this work; if not, write to the Free Software Foundation,
pliden@6413:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
pliden@6413:  *
pliden@6413:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
pliden@6413:  * or visit www.oracle.com if you need additional information or have any
pliden@6413:  * questions.
pliden@6413:  *
pliden@6413:  */
pliden@6413: 
pliden@6413: #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1STRINGDEDUPTHREAD_HPP
pliden@6413: #define SHARE_VM_GC_IMPLEMENTATION_G1_G1STRINGDEDUPTHREAD_HPP
pliden@6413: 
pliden@6413: #include "gc_implementation/g1/g1StringDedupStat.hpp"
pliden@6413: #include "gc_implementation/shared/concurrentGCThread.hpp"
pliden@6413: 
pliden@6413: //
pliden@6413: // The deduplication thread is where the actual deduplication occurs. It waits for
pliden@6413: // deduplication candidates to appear on the deduplication queue, removes them from
pliden@6413: // the queue and tries to deduplicate them. It uses the deduplication hashtable to
pliden@6413: // find identical, already existing, character arrays on the heap. The thread runs
pliden@6413: // concurrently with the Java application but participates in safepoints to allow
pliden@6413: // the GC to adjust and unlink oops from the deduplication queue and table.
pliden@6413: //
pliden@6413: class G1StringDedupThread: public ConcurrentGCThread {
pliden@6413: private:
pliden@6413:   static G1StringDedupThread* _thread;
pliden@6413: 
pliden@6413:   G1StringDedupThread();
pliden@6413:   ~G1StringDedupThread();
pliden@6413: 
pliden@6413:   void print(outputStream* st, const G1StringDedupStat& last_stat, const G1StringDedupStat& total_stat);
pliden@6413: 
pliden@6413: public:
pliden@6413:   static void create();
pliden@6690:   static void stop();
pliden@6690: 
pliden@6413:   static G1StringDedupThread* thread();
pliden@6413: 
pliden@6413:   virtual void run();
pliden@6413:   virtual void print_on(outputStream* st) const;
pliden@6413: };
pliden@6413: 
pliden@6413: #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1STRINGDEDUPTHREAD_HPP