| // Licensed to the Apache Software Foundation (ASF) under one or more |
| // contributor license agreements. See the NOTICE file distributed with |
| // this work for additional information regarding copyright ownership. |
| // The ASF licenses this file to You under the Apache License, Version 2.0 |
| // (the "License"); you may not use this file except in compliance with |
| // the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| using FlatBuffers; |
| using System; |
| |
| namespace Apache.Arrow.Ipc |
| { |
| internal sealed class ReadOnlyMemoryBufferAllocator : ByteBufferAllocator |
| { |
| private readonly ReadOnlyMemory<byte> _buffer; |
| |
| public ReadOnlyMemoryBufferAllocator(ReadOnlyMemory<byte> buffer) |
| { |
| _buffer = buffer; |
| Length = buffer.Length; |
| } |
| |
| public override ReadOnlySpan<byte> ReadOnlySpan => _buffer.Span; |
| public override ReadOnlyMemory<byte> ReadOnlyMemory => _buffer; |
| |
| // since this is read-only, the following are not supported |
| public override Memory<byte> Memory => throw new NotSupportedException(); |
| public override Span<byte> Span => throw new NotSupportedException(); |
| public override void GrowFront(int newSize) => throw new NotSupportedException(); |
| } |
| } |