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1 | // Licensed to the Apache Software Foundation (ASF) under one or more |
2 | // contributor license agreements. See the NOTICE file distributed with | |
3 | // this work for additional information regarding copyright ownership. | |
4 | // The ASF licenses this file to You under the Apache License, Version 2.0 | |
5 | // (the "License"); you may not use this file except in compliance with | |
6 | // the License. You may obtain a copy of the License at | |
7 | // | |
8 | // http://www.apache.org/licenses/LICENSE-2.0 | |
9 | // | |
10 | // Unless required by applicable law or agreed to in writing, software | |
11 | // distributed under the License is distributed on an "AS IS" BASIS, | |
12 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
13 | // See the License for the specific language governing permissions and | |
14 | // limitations under the License. | |
15 | ||
16 | using FlatBuffers; | |
17 | using System; | |
18 | ||
19 | namespace Apache.Arrow.Ipc | |
20 | { | |
21 | internal sealed class ReadOnlyMemoryBufferAllocator : ByteBufferAllocator | |
22 | { | |
23 | private readonly ReadOnlyMemory<byte> _buffer; | |
24 | ||
25 | public ReadOnlyMemoryBufferAllocator(ReadOnlyMemory<byte> buffer) | |
26 | { | |
27 | _buffer = buffer; | |
28 | Length = buffer.Length; | |
29 | } | |
30 | ||
31 | public override ReadOnlySpan<byte> ReadOnlySpan => _buffer.Span; | |
32 | public override ReadOnlyMemory<byte> ReadOnlyMemory => _buffer; | |
33 | ||
34 | // since this is read-only, the following are not supported | |
35 | public override Memory<byte> Memory => throw new NotSupportedException(); | |
36 | public override Span<byte> Span => throw new NotSupportedException(); | |
37 | public override void GrowFront(int newSize) => throw new NotSupportedException(); | |
38 | } | |
39 | } |