1 /*

     2  * Copyright (c) 2003, 2015, 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_GC_PARALLEL_ASPSYOUNGGEN_HPP

    26 #define SHARE_VM_GC_PARALLEL_ASPSYOUNGGEN_HPP

    27 

    28 #include "gc/parallel/mutableSpace.hpp"

    29 #include "gc/parallel/objectStartArray.hpp"

    30 #include "gc/parallel/psVirtualspace.hpp"

    31 #include "gc/parallel/psYoungGen.hpp"

    32 #include "gc/parallel/spaceCounters.hpp"

    33 #include "gc/shared/generationCounters.hpp"

    34 #include "gc/shared/spaceDecorator.hpp"

    35 

    36 class ASPSYoungGen : public PSYoungGen {

    37   friend class VMStructs;

    38  private:

    39   size_t _gen_size_limit;

    40  protected:

    41   virtual size_t available_to_live();

    42 

    43  public:

    44   ASPSYoungGen(size_t         initial_byte_size,

    45                size_t         minimum_byte_size,

    46                size_t         byte_size_limit);

    47 

    48   ASPSYoungGen(PSVirtualSpace* vs,

    49                size_t         initial_byte_size,

    50                size_t         minimum_byte_size,

    51                size_t         byte_size_limit);

    52 

    53   void initialize(ReservedSpace rs, size_t alignment);

    54   void initialize_virtual_space(ReservedSpace rs, size_t alignment);

    55 

    56   size_t gen_size_limit() { return _gen_size_limit; }

    57   void set_gen_size_limit(size_t v) { _gen_size_limit = v; }

    58 

    59   bool resize_generation(size_t eden_size, size_t survivor_size);

    60   void resize_spaces(size_t eden_size, size_t survivor_size);

    61 

    62   // Adjust eden to be consistent with the virtual space.

    63   void reset_after_change();

    64 

    65   // Adaptive size policy support

    66   // Return number of bytes that the generation can expand/contract.

    67   size_t available_for_expansion();

    68   size_t available_for_contraction();

    69 

    70   // Accessors

    71   void set_reserved(MemRegion v) { _reserved = v; }

    72 

    73   // Printing support

    74   virtual const char* short_name() const { return "ASPSYoungGen"; }

    75 };

    76 

    77 #endif // SHARE_VM_GC_PARALLEL_ASPSYOUNGGEN_HPP