1/*
2 * Copyright (c) 2015, 2018, 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#ifndef SHARE_GC_Z_ZLOCK_HPP
25#define SHARE_GC_Z_ZLOCK_HPP
26
27#include "memory/allocation.hpp"
28#include <pthread.h>
29
30class ZLock {
31private:
32 pthread_mutex_t _lock;
33
34public:
35 ZLock();
36 ~ZLock();
37
38 void lock();
39 bool try_lock();
40 void unlock();
41};
42
43class ZReentrantLock {
44private:
45 ZLock _lock;
46 Thread* volatile _owner;
47 uint64_t _count;
48
49public:
50 ZReentrantLock();
51
52 void lock();
53 void unlock();
54
55 bool is_owned() const;
56};
57
58template <typename T>
59class ZLocker : public StackObj {
60private:
61 T* const _lock;
62
63public:
64 ZLocker(T* lock);
65 ~ZLocker();
66};
67
68#endif // SHARE_GC_Z_ZLOCK_HPP
69