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.
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
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23 */
24
25#ifndef SHARE_JFR_WRITERS_JFRSTREAMWRITERHOST_HPP
26#define SHARE_JFR_WRITERS_JFRSTREAMWRITERHOST_HPP
27
28#include "jfr/utilities/jfrTypes.hpp"
29#include "jfr/writers/jfrMemoryWriterHost.inline.hpp"
30
31template <typename Adapter, typename AP> // Adapter and AllocationPolicy
32class StreamWriterHost : public MemoryWriterHost<Adapter, AP> {
33 public:
34 typedef typename Adapter::StorageType StorageType;
35 private:
36 int64_t _stream_pos;
37 fio_fd _fd;
38 int64_t current_stream_position() const;
39
40 protected:
41 StreamWriterHost(StorageType* storage, Thread* thread);
42 StreamWriterHost(StorageType* storage, size_t size);
43 StreamWriterHost(Thread* thread);
44 bool accommodate(size_t used, size_t requested);
45 void bytes(void* dest, const void* src, size_t len);
46 void flush(size_t size);
47 bool has_valid_fd() const;
48
49 public:
50 int64_t current_offset() const;
51 void seek(int64_t offset);
52 void flush();
53 void write_unbuffered(const void* src, size_t len);
54 bool is_valid() const;
55 void close_fd();
56 void reset(fio_fd fd);
57};
58
59#endif // SHARE_JFR_WRITERS_JFRSTREAMWRITERHOST_HPP
60