Move solution and projects to src

src/Ryujinx.Common/Memory/ArrayPtr.cs

@@ -0,0 +1,123 @@
+using System;
+using System.Diagnostics.CodeAnalysis;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.Common.Memory
+{
+    /// <summary>
+    /// Represents an array of unmanaged resources.
+    /// </summary>
+    /// <typeparam name="T">Array element type</typeparam>
+    public unsafe struct ArrayPtr<T> : IEquatable<ArrayPtr<T>>, IArray<T> where T : unmanaged
+    {
+        private IntPtr _ptr;
+
+        /// <summary>
+        /// Null pointer.
+        /// </summary>
+        public static ArrayPtr<T> Null => new ArrayPtr<T>() { _ptr = IntPtr.Zero };
+
+        /// <summary>
+        /// True if the pointer is null, false otherwise.
+        /// </summary>
+        public bool IsNull => _ptr == IntPtr.Zero;
+
+        /// <summary>
+        /// Number of elements on the array.
+        /// </summary>
+        public int Length { get; }
+
+        /// <summary>
+        /// Gets a reference to the item at the given index.
+        /// </summary>
+        /// <remarks>
+        /// No bounds checks are performed, this allows negative indexing,
+        /// but care must be taken if the index may be out of bounds.
+        /// </remarks>
+        /// <param name="index">Index of the element</param>
+        /// <returns>Reference to the element at the given index</returns>
+        public ref T this[int index] => ref Unsafe.AsRef<T>((T*)_ptr + index);
+
+        /// <summary>
+        /// Creates a new array from a given reference.
+        /// </summary>
+        /// <remarks>
+        /// For data on the heap, proper pinning is necessary during
+        /// use. Failure to do so will result in memory corruption and crashes.
+        /// </remarks>
+        /// <param name="value">Reference of the first array element</param>
+        /// <param name="length">Number of elements on the array</param>
+        public ArrayPtr(ref T value, int length)
+        {
+            _ptr = (IntPtr)Unsafe.AsPointer(ref value);
+            Length = length;
+        }
+
+        /// <summary>
+        /// Creates a new array from a given pointer.
+        /// </summary>
+        /// <param name="ptr">Array base pointer</param>
+        /// <param name="length">Number of elements on the array</param>
+        public ArrayPtr(T* ptr, int length)
+        {
+            _ptr = (IntPtr)ptr;
+            Length = length;
+        }
+
+        /// <summary>
+        /// Creates a new array from a given pointer.
+        /// </summary>
+        /// <param name="ptr">Array base pointer</param>
+        /// <param name="length">Number of elements on the array</param>
+        public ArrayPtr(IntPtr ptr, int length)
+        {
+            _ptr = ptr;
+            Length = length;
+        }
+
+        /// <summary>
+        /// Splits the array starting at the specified position.
+        /// </summary>
+        /// <param name="start">Index where the new array should start</param>
+        /// <returns>New array starting at the specified position</returns>
+        public ArrayPtr<T> Slice(int start) => new ArrayPtr<T>(ref this[start], Length - start);
+
+        /// <summary>
+        /// Gets a span from the array.
+        /// </summary>
+        /// <returns>Span of the array</returns>
+        public Span<T> AsSpan() => Length == 0 ? Span<T>.Empty : MemoryMarshal.CreateSpan(ref this[0], Length);
+
+        /// <summary>
+        /// Gets the array base pointer.
+        /// </summary>
+        /// <returns>Base pointer</returns>
+        public T* ToPointer() => (T*)_ptr;
+
+        public override bool Equals(object obj)
+        {
+            return obj is ArrayPtr<T> other && Equals(other);
+        }
+
+        public bool Equals([AllowNull] ArrayPtr<T> other)
+        {
+            return _ptr == other._ptr && Length == other.Length;
+        }
+
+        public override int GetHashCode()
+        {
+            return HashCode.Combine(_ptr, Length);
+        }
+
+        public static bool operator ==(ArrayPtr<T> left, ArrayPtr<T> right)
+        {
+            return left.Equals(right);
+        }
+
+        public static bool operator !=(ArrayPtr<T> left, ArrayPtr<T> right)
+        {
+            return !(left == right);
+        }
+    }
+}