1/*
2 * Copyright (c) 2016, 2019, 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.
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23 */
24
25#ifndef SHARE_JFR_WRITERS_JFRMEMORYWRITERHOST_HPP
26#define SHARE_JFR_WRITERS_JFRMEMORYWRITERHOST_HPP
27
28#include "jfr/writers/jfrStorageHost.inline.hpp"
29
30#ifdef ASSERT
31class ExclusiveAccessAssert {
32 private:
33 bool _acquired;
34 public:
35 ExclusiveAccessAssert() : _acquired(false) {}
36 void acquire() { assert_non_acquired(); _acquired = true; }
37 void release() { assert_acquired(); _acquired = false; }
38 bool is_acquired() const { return _acquired; }
39 void assert_acquired() const { assert(_acquired, "Not acquired!"); }
40 void assert_non_acquired() const { assert(!_acquired, "Already acquired!"); }
41};
42#else
43 class ExclusiveAccessAssert {};
44#endif
45
46template <typename Adapter, typename AP, typename AccessAssert = ExclusiveAccessAssert>
47class MemoryWriterHost : public StorageHost<Adapter, AP> {
48 debug_only(AccessAssert _access;)
49 public:
50 typedef typename Adapter::StorageType StorageType;
51 protected:
52 void bytes(void* dest, const void* buf, size_t len);
53 MemoryWriterHost(StorageType* storage, Thread* thread);
54 MemoryWriterHost(StorageType* storage, size_t size);
55 MemoryWriterHost(Thread* thread);
56 debug_only(bool is_acquired() const;)
57 public:
58 void acquire();
59 void release();
60};
61
62template <typename Adapter, typename AP>
63class AcquireReleaseMemoryWriterHost : public MemoryWriterHost<Adapter, AP> {
64 public:
65 typedef typename Adapter::StorageType StorageType;
66 AcquireReleaseMemoryWriterHost(StorageType* storage, Thread* thread);
67 AcquireReleaseMemoryWriterHost(StorageType* storage, size_t size);
68 AcquireReleaseMemoryWriterHost(Thread* thread);
69 ~AcquireReleaseMemoryWriterHost();
70};
71
72#endif // SHARE_JFR_WRITERS_JFRMEMORYWRITERHOST_HPP
73