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

    21  * questions.

    22  *

    23  */

    24 

    25 #ifndef SHARE_JFR_RECORDER_CHECKPOINT_JFRCHECKPOINTBLOB_HPP

    26 #define SHARE_JFR_RECORDER_CHECKPOINT_JFRCHECKPOINTBLOB_HPP

    27 

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

    29 #include "jfr/utilities/jfrRefCountPointer.hpp"

    30 

    31 class JfrCheckpointBlob;

    32 class JfrCheckpointWriter;

    33 

    34 typedef RefCountPointer<JfrCheckpointBlob, MultiThreadedRefCounter> JfrCheckpointBlobReference;

    35 typedef RefCountHandle<JfrCheckpointBlobReference> JfrCheckpointBlobHandle;

    36 

    37 class JfrCheckpointBlob : public JfrCHeapObj {

    38   template <typename, typename>

    39   friend class RefCountPointer;

    40  private:

    41   const u1* _checkpoint;

    42   const size_t _size;

    43   JfrCheckpointBlobHandle _next;

    44   mutable bool _written;

    45 

    46   JfrCheckpointBlob(const u1* checkpoint, size_t size);

    47   ~JfrCheckpointBlob();

    48   const JfrCheckpointBlobHandle& next() const;

    49   void write_this(JfrCheckpointWriter& writer) const;

    50 

    51  public:

    52   void write(JfrCheckpointWriter& writer) const;

    53   void exclusive_write(JfrCheckpointWriter& writer) const;

    54   void reset_write_state() const;

    55   void set_next(const JfrCheckpointBlobHandle& ref);

    56   static JfrCheckpointBlobHandle make(const u1* checkpoint, size_t size);

    57 };

    58 

    59 #endif // SHARE_JFR_RECORDER_CHECKPOINT_JFRCHECKPOINTBLOB_HPP