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  */

    24 

    25 #ifndef SHARE_VM_JFR_WRITERS_JFRSTORAGEHOST_HPP

    26 #define SHARE_VM_JFR_WRITERS_JFRSTORAGEHOST_HPP

    27 

    28 #include "jfr/writers/jfrPosition.inline.hpp"

    29 

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

    31 class StorageHost : public Position<AP> {

    32  public:

    33   typedef typename Adapter::StorageType StorageType;

    34  private:

    35   Adapter _adapter;

    36 

    37  protected:

    38   void bind();

    39   void soft_reset();

    40   void hard_reset();

    41   void cancel();

    42   bool is_backed();

    43   bool accommodate(size_t used, size_t requested);

    44   void commit();

    45   void release();

    46   StorageHost(StorageType* storage, Thread* thread);

    47   StorageHost(StorageType* storage, size_t size);

    48   StorageHost(Thread* thread);

    49 

    50  public:

    51   StorageType* storage();

    52   bool is_valid() const;

    53   void set_storage(StorageType* storage);

    54   void flush();

    55   void seek(intptr_t offset);

    56 };

    57 

    58 #endif // SHARE_VM_JFR_WRITERS_JFRSTORAGEHOST_HPP

    59