jdk8-mips64-public/hotspot: src/share/vm/jfr/writers/jfrStreamWriterHost.hpp@db357034b763

8217647: JFR: recordings on 32-bit systems unreadable
Reviewed-by: egahlin
Contributed-by: boris.ulasevich@bell-sw.com, markus.gronlund@oracle.com

     1 /*

     2  * Copyright (c) 2016, 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  */

    25 #ifndef SHARE_VM_JFR_WRITERS_JFRSTREAMWRITERHOST_HPP

    26 #define SHARE_VM_JFR_WRITERS_JFRSTREAMWRITERHOST_HPP

    28 #include "jfr/utilities/jfrTypes.hpp"

    29 #include "jfr/writers/jfrMemoryWriterHost.inline.hpp"

    31 template <typename Adapter, typename AP> // Adapter and AllocationPolicy

    32 class 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;

    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;

    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 };

    59 #endif // SHARE_VM_JFR_WRITERS_JFRSTREAMWRITERHOST_HPP

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