1/*
2 * Copyright (c) 2012, 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.
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_JFR_RECORDER_STORAGE_JFRSTORAGE_HPP
25#define SHARE_JFR_RECORDER_STORAGE_JFRSTORAGE_HPP
26
27#include "jfr/recorder/storage/jfrBuffer.hpp"
28#include "jfr/recorder/storage/jfrMemorySpace.hpp"
29#include "jfr/recorder/storage/jfrMemorySpaceRetrieval.hpp"
30
31class JfrChunkWriter;
32class JfrPostBox;
33class JfrStorage;
34class JfrStorageControl;
35
36typedef JfrMemorySpace<JfrBuffer, JfrMspaceAlternatingRetrieval, JfrStorage> JfrStorageMspace;
37typedef JfrMemorySpace<JfrBuffer, JfrThreadLocalRetrieval, JfrStorage> JfrThreadLocalMspace;
38typedef JfrMemorySpace<JfrAgeNode, JfrMspaceSequentialRetrieval, JfrStorage> JfrStorageAgeMspace;
39
40//
41// Responsible for providing backing storage for writing events.
42//
43class JfrStorage : public JfrCHeapObj {
44 public:
45 typedef JfrStorageMspace::Type Buffer;
46 private:
47 JfrStorageControl* _control;
48 JfrStorageMspace* _global_mspace;
49 JfrThreadLocalMspace* _thread_local_mspace;
50 JfrStorageMspace* _transient_mspace;
51 JfrStorageAgeMspace* _age_mspace;
52 JfrChunkWriter& _chunkwriter;
53 JfrPostBox& _post_box;
54
55 // mspace callbacks
56 void register_full(Buffer* t, Thread* thread);
57 void lock();
58 void unlock();
59 DEBUG_ONLY(bool is_locked() const;)
60
61 Buffer* acquire_large(size_t size, Thread* t);
62 Buffer* acquire_transient(size_t size, Thread* thread);
63 bool flush_regular_buffer(Buffer* const buffer, Thread* t);
64 Buffer* flush_regular(Buffer* cur, const u1* cur_pos, size_t used, size_t req, bool native, Thread* t);
65 Buffer* flush_large(Buffer* cur, const u1* cur_pos, size_t used, size_t req, bool native, Thread* t);
66 Buffer* provision_large(Buffer* cur, const u1* cur_pos, size_t used, size_t req, bool native, Thread* t);
67 void release(Buffer* buffer, Thread* t);
68
69 size_t clear();
70 size_t clear_full();
71 size_t write();
72 size_t write_full();
73 size_t write_at_safepoint();
74 size_t scavenge();
75
76 JfrStorage(JfrChunkWriter& cw, JfrPostBox& post_box);
77 ~JfrStorage();
78
79 static JfrStorage& instance();
80 static JfrStorage* create(JfrChunkWriter& chunkwriter, JfrPostBox& post_box);
81 bool initialize();
82 static void destroy();
83
84 public:
85 static Buffer* acquire_thread_local(Thread* t, size_t size = 0);
86 static void release_thread_local(Buffer* buffer, Thread* t);
87 void release_large(Buffer* const buffer, Thread* t);
88 static Buffer* flush(Buffer* cur, size_t used, size_t req, bool native, Thread* t);
89 void discard_oldest(Thread* t);
90 static JfrStorageControl& control();
91
92 friend class JfrRecorder;
93 friend class JfrRecorderService;
94 template <typename, template <typename> class, typename>
95 friend class JfrMemorySpace;
96};
97
98#endif // SHARE_JFR_RECORDER_STORAGE_JFRSTORAGE_HPP
99