| // 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 System; |
| using System.Buffers; |
| using System.Runtime.CompilerServices; |
| using Apache.Arrow.Memory; |
| |
| namespace Apache.Arrow |
| { |
| public readonly partial struct ArrowBuffer : IEquatable<ArrowBuffer>, IDisposable |
| { |
| private readonly IMemoryOwner<byte> _memoryOwner; |
| private readonly ReadOnlyMemory<byte> _memory; |
| |
| public static ArrowBuffer Empty => new ArrowBuffer(Memory<byte>.Empty); |
| |
| public ArrowBuffer(ReadOnlyMemory<byte> data) |
| { |
| _memoryOwner = null; |
| _memory = data; |
| } |
| |
| internal ArrowBuffer(IMemoryOwner<byte> memoryOwner) |
| { |
| // When wrapping an IMemoryOwner, don't cache the Memory<byte> |
| // since the owner may be disposed, and the cached Memory would |
| // be invalid. |
| |
| _memoryOwner = memoryOwner; |
| _memory = Memory<byte>.Empty; |
| } |
| |
| public ReadOnlyMemory<byte> Memory => |
| _memoryOwner != null ? _memoryOwner.Memory : _memory; |
| |
| public bool IsEmpty => Memory.IsEmpty; |
| |
| public int Length => Memory.Length; |
| |
| public ReadOnlySpan<byte> Span |
| { |
| [MethodImpl(MethodImplOptions.AggressiveInlining)] |
| get => Memory.Span; |
| } |
| |
| public ArrowBuffer Clone(MemoryAllocator allocator = default) |
| { |
| return new Builder<byte>(Span.Length) |
| .Append(Span) |
| .Build(allocator); |
| } |
| |
| public bool Equals(ArrowBuffer other) |
| { |
| return Span.SequenceEqual(other.Span); |
| } |
| |
| public void Dispose() |
| { |
| _memoryOwner?.Dispose(); |
| } |
| } |
| } |