17764
|
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
|