1 /*
 2  * Copyright Amazon.com Inc. 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_GC_SHENANDOAH_HEURISTICS_SHENANDOAHSPACEINFO_HPP
26 #define SHARE_GC_SHENANDOAH_HEURISTICS_SHENANDOAHSPACEINFO_HPP
27 
28 #include "utilities/globalDefinitions.hpp"
29 
30 /*
31  * The purpose of this interface is to decouple the heuristics from a
32  * direct dependency on the ShenandoahHeap singleton instance. This is
33  * done to facilitate future unit testing of the heuristics and to support
34  * future operational modes of Shenandoah in which the heap may be split
35  * into generations.
36  */
37 class ShenandoahSpaceInfo {
38 public:
39   virtual const char* name() const = 0;
40   virtual size_t soft_max_capacity() const = 0;
41   virtual size_t max_capacity() const = 0;
42   virtual size_t soft_available() const = 0;
43   virtual size_t available() const = 0;
44   virtual size_t used() const = 0;
45   virtual size_t bytes_allocated_since_gc_start() const = 0;
46 };
47 
48 #endif //SHARE_GC_SHENANDOAH_HEURISTICS_SHENANDOAHSPACEINFO_HPP