1 /*

     2  * Copyright (c) 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_GC_Z_ZSAFEDELETE_HPP

    25 #define SHARE_GC_Z_ZSAFEDELETE_HPP

    26 

    27 #include "gc/z/zArray.hpp"

    28 #include "gc/z/zLock.hpp"

    29 #include "metaprogramming/removeExtent.hpp"

    30 

    31 template <typename T>

    32 class ZSafeDelete {

    33 private:

    34   typedef typename RemoveExtent<T>::type ItemT;

    35 

    36   ZLock          _lock;

    37   uint64_t       _enabled;

    38   ZArray<ItemT*> _deferred;

    39 

    40   bool deferred_delete(ItemT* item);

    41   void immediate_delete(ItemT* item);

    42 

    43 public:

    44   ZSafeDelete();

    45 

    46   void enable_deferred_delete();

    47   void disable_deferred_delete();

    48 

    49   void operator()(ItemT* item);

    50 };

    51 

    52 #endif // SHARE_GC_Z_ZSAFEDELETE_HPP