1 /*
 2  * Copyright (c) 2024, 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.  Oracle designates this
 8  * particular file as subject to the "Classpath" exception as provided
 9  * by Oracle in the LICENSE file that accompanied this code.
10  *
11  * This code is distributed in the hope that it will be useful, but WITHOUT
12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14  * version 2 for more details (a copy is included in the LICENSE file that
15  * accompanied this code).
16  *
17  * You should have received a copy of the GNU General Public License version
18  * 2 along with this work; if not, write to the Free Software Foundation,
19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20  *
21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22  * or visit www.oracle.com if you need additional information or have any
23  * questions.
24  */
25 package life;
26 
27 import hat.Accelerator;
28 import optkl.ifacemapper.BoundSchema;
29 import optkl.ifacemapper.Buffer;
30 import optkl.ifacemapper.MappableIface;
31 import optkl.ifacemapper.Schema;
32 
33 import java.lang.foreign.MemorySegment;
34 import java.lang.foreign.ValueLayout;
35 
36 import static java.lang.foreign.ValueLayout.JAVA_BYTE;
37 import static java.lang.foreign.ValueLayout.JAVA_INT;
38 
39 public interface CellGrid extends Buffer {
40     byte ALIVE = (byte) 0xff;
41     byte DEAD = 0x00;
42     /*
43      * struct CellGrid{
44      *     int width;
45      *     int height;
46      *     byte[width*height*2] cellArray;
47      *  }
48      */
49     int width();
50 
51     int height();
52 
53     byte cell(long idx);
54 
55     void cell(long idx, byte b);
56 
57     Schema<CellGrid> schema = Schema.of(CellGrid.class, lifeData -> lifeData
58             .arrayLen("width", "height").stride(2).array("cell")
59     );
60 
61     static CellGrid create(Accelerator accelerator, int width, int height) {
62         return BoundSchema.of(accelerator, schema, width, height).allocate();
63     }
64 
65     ValueLayout valueLayout = JAVA_BYTE;
66     long headerOffset = JAVA_INT.byteSize() * 2;
67 
68     default void copySliceTo(byte[] bytes, int to) {
69         long offset = headerOffset + (long) to * valueLayout.byteSize();
70         MemorySegment.copy(MappableIface.getMemorySegment(this), valueLayout, offset, bytes, 0, width() * height());
71 
72     }
73 
74    // default int wxh() {
75       //  return width() * height();
76    // }
77 }