From cee712105850ac3385cd0091a923438167433f9f Mon Sep 17 00:00:00 2001
From: TSR Berry <20988865+TSRBerry@users.noreply.github.com>
Date: Sat, 8 Apr 2023 01:22:00 +0200
Subject: Move solution and projects to src

---
 src/Ryujinx.Common/Memory/ByteMemoryPool.cs | 108 ++++++++++++++++++++++++++++
 1 file changed, 108 insertions(+)
 create mode 100644 src/Ryujinx.Common/Memory/ByteMemoryPool.cs

(limited to 'src/Ryujinx.Common/Memory/ByteMemoryPool.cs')

diff --git a/src/Ryujinx.Common/Memory/ByteMemoryPool.cs b/src/Ryujinx.Common/Memory/ByteMemoryPool.cs
new file mode 100644
index 00000000..2910f408
--- /dev/null
+++ b/src/Ryujinx.Common/Memory/ByteMemoryPool.cs
@@ -0,0 +1,108 @@
+using System;
+using System.Buffers;
+
+namespace Ryujinx.Common.Memory
+{
+    /// <summary>
+    /// Provides a pool of re-usable byte array instances.
+    /// </summary>
+    public sealed partial class ByteMemoryPool
+    {
+        private static readonly ByteMemoryPool _shared = new ByteMemoryPool();
+
+        /// <summary>
+        /// Constructs a <see cref="ByteMemoryPool"/> instance. Private to force access through
+        /// the <see cref="ByteMemoryPool.Shared"/> instance.
+        /// </summary>
+        private ByteMemoryPool()
+        {
+            // No implementation
+        }
+
+        /// <summary>
+        /// Retrieves a shared <see cref="ByteMemoryPool"/> instance.
+        /// </summary>
+        public static ByteMemoryPool Shared => _shared;
+
+        /// <summary>
+        /// Returns the maximum buffer size supported by this pool.
+        /// </summary>
+        public int MaxBufferSize => Array.MaxLength;
+
+        /// <summary>
+        /// Rents a byte memory buffer from <see cref="ArrayPool{Byte}.Shared"/>.
+        /// The buffer may contain data from a prior use.
+        /// </summary>
+        /// <param name="length">The buffer's required length in bytes</param>
+        /// <returns>A <see cref="IMemoryOwner{Byte}"/> wrapping the rented memory</returns>
+        /// <exception cref="ArgumentOutOfRangeException"></exception>
+        public IMemoryOwner<byte> Rent(long length)
+            => RentImpl(checked((int)length));
+
+        /// <summary>
+        /// Rents a byte memory buffer from <see cref="ArrayPool{Byte}.Shared"/>.
+        /// The buffer may contain data from a prior use.
+        /// </summary>
+        /// <param name="length">The buffer's required length in bytes</param>
+        /// <returns>A <see cref="IMemoryOwner{Byte}"/> wrapping the rented memory</returns>
+        /// <exception cref="ArgumentOutOfRangeException"></exception>
+        public IMemoryOwner<byte> Rent(ulong length)
+            => RentImpl(checked((int)length));
+
+        /// <summary>
+        /// Rents a byte memory buffer from <see cref="ArrayPool{Byte}.Shared"/>.
+        /// The buffer may contain data from a prior use.
+        /// </summary>
+        /// <param name="length">The buffer's required length in bytes</param>
+        /// <returns>A <see cref="IMemoryOwner{Byte}"/> wrapping the rented memory</returns>
+        /// <exception cref="ArgumentOutOfRangeException"></exception>
+        public IMemoryOwner<byte> Rent(int length)
+            => RentImpl(length);
+
+        /// <summary>
+        /// Rents a byte memory buffer from <see cref="ArrayPool{Byte}.Shared"/>.
+        /// The buffer's contents are cleared (set to all 0s) before returning.
+        /// </summary>
+        /// <param name="length">The buffer's required length in bytes</param>
+        /// <returns>A <see cref="IMemoryOwner{Byte}"/> wrapping the rented memory</returns>
+        /// <exception cref="ArgumentOutOfRangeException"></exception>
+        public IMemoryOwner<byte> RentCleared(long length)
+            => RentCleared(checked((int)length));
+
+        /// <summary>
+        /// Rents a byte memory buffer from <see cref="ArrayPool{Byte}.Shared"/>.
+        /// The buffer's contents are cleared (set to all 0s) before returning.
+        /// </summary>
+        /// <param name="length">The buffer's required length in bytes</param>
+        /// <returns>A <see cref="IMemoryOwner{Byte}"/> wrapping the rented memory</returns>
+        /// <exception cref="ArgumentOutOfRangeException"></exception>
+        public IMemoryOwner<byte> RentCleared(ulong length)
+            => RentCleared(checked((int)length));
+
+        /// <summary>
+        /// Rents a byte memory buffer from <see cref="ArrayPool{Byte}.Shared"/>.
+        /// The buffer's contents are cleared (set to all 0s) before returning.
+        /// </summary>
+        /// <param name="length">The buffer's required length in bytes</param>
+        /// <returns>A <see cref="IMemoryOwner{Byte}"/> wrapping the rented memory</returns>
+        /// <exception cref="ArgumentOutOfRangeException"></exception>
+        public IMemoryOwner<byte> RentCleared(int length)
+        {
+            var buffer = RentImpl(length);
+            
+            buffer.Memory.Span.Clear();
+            
+            return buffer;
+        }
+
+        private static ByteMemoryPoolBuffer RentImpl(int length)
+        {
+            if ((uint)length > Array.MaxLength)
+            {
+                throw new ArgumentOutOfRangeException(nameof(length), length, null);
+            }
+
+            return new ByteMemoryPoolBuffer(length);
+        }
+    }
+}
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