1 /*
 2  *  Copyright (c) 2020, 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 import jdk.incubator.foreign.CLinker;
26 import jdk.incubator.foreign.MemoryLayout;
27 import jdk.incubator.foreign.MemorySegment;
28 import jdk.incubator.foreign.ResourceScope;
29 import jdk.incubator.foreign.SegmentAllocator;
30 
31 public class NativeTestHelper {
32 
33     static CLinker.TypeKind kind(MemoryLayout layout) {
34         return (CLinker.TypeKind)layout.attribute(CLinker.TypeKind.ATTR_NAME).orElseThrow(
35                 () -> new IllegalStateException("Unexpected value layout: could not determine ABI class"));
36     }
37 
38     public static boolean isIntegral(MemoryLayout layout) {
39         return kind(layout).isIntegral();
40     }
41 
42     public static boolean isPointer(MemoryLayout layout) {
43         return kind(layout).isPointer();
44     }
45 
46     public static class NativeScope implements SegmentAllocator, AutoCloseable {
47         final ResourceScope resourceScope;
48         final ResourceScope.Handle scopeHandle;
49         final SegmentAllocator allocator;
50 
51         long allocatedBytes = 0;
52 
53         public NativeScope() {
54             this.resourceScope = ResourceScope.newConfinedScope();
55             this.scopeHandle = resourceScope.acquire();
56             this.allocator = SegmentAllocator.arenaAllocator(resourceScope);
57         }
58 
59         @Override
60         public MemorySegment allocate(long bytesSize, long bytesAlignment) {
61             allocatedBytes += bytesSize;
62             return allocator.allocate(bytesSize, bytesAlignment);
63         }
64 
65         public ResourceScope scope() {
66             return resourceScope;
67         }
68 
69         public long allocatedBytes() {
70             return allocatedBytes;
71         }
72 
73         @Override
74         public void close() {
75             resourceScope.release(scopeHandle);
76             resourceScope.close();
77         }
78     }
79 }