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comparison: src/share/vm/gc_implementation/g1/g1StringDedupThread.hpp
src/share/vm/gc_implementation/g1/g1StringDedupThread.hpp
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| 1 /* | |
| 2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. | |
| 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 20 * or visit www.oracle.com if you need additional information or have any | |
| 21 * questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1STRINGDEDUPTHREAD_HPP | |
| 26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1STRINGDEDUPTHREAD_HPP | |
| 27 | |
| 28 #include "gc_implementation/g1/g1StringDedupStat.hpp" | |
| 29 #include "gc_implementation/shared/concurrentGCThread.hpp" | |
| 30 | |
| 31 // | |
| 32 // The deduplication thread is where the actual deduplication occurs. It waits for | |
| 33 // deduplication candidates to appear on the deduplication queue, removes them from | |
| 34 // the queue and tries to deduplicate them. It uses the deduplication hashtable to | |
| 35 // find identical, already existing, character arrays on the heap. The thread runs | |
| 36 // concurrently with the Java application but participates in safepoints to allow | |
| 37 // the GC to adjust and unlink oops from the deduplication queue and table. | |
| 38 // | |
| 39 class G1StringDedupThread: public ConcurrentGCThread { | |
| 40 private: | |
| 41 static G1StringDedupThread* _thread; | |
| 42 | |
| 43 G1StringDedupThread(); | |
| 44 ~G1StringDedupThread(); | |
| 45 | |
| 46 void print(outputStream* st, const G1StringDedupStat& last_stat, const G1StringDedupStat& total_stat); | |
| 47 | |
| 48 public: | |
| 49 static void create(); | |
| 50 static G1StringDedupThread* thread(); | |
| 51 | |
| 52 virtual void run(); | |
| 53 virtual void print_on(outputStream* st) const; | |
| 54 }; | |
| 55 | |
| 56 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1STRINGDEDUPTHREAD_HPP |
