1 files changed, 49 insertions, 0 deletions

diff --git a/src/libraries/Common/tests/TestUtilities/System/Buffers/BoundedMemory.cs b/src/libraries/Common/tests/TestUtilities/System/Buffers/BoundedMemory.cs
new file mode 100644
index 00000000000..cc39ff3cd80
--- /dev/null
+++ b/src/libraries/Common/tests/TestUtilities/System/Buffers/BoundedMemory.cs
@@ -0,0 +1,49 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+namespace System.Buffers
+{
+    /// <summary>
+    /// Represents a region of native memory. The <see cref="Memory"/> property can be used
+    /// to get a <see cref="Memory{Byte}"/> backed by this memory region.
+    /// </summary>
+    public abstract class BoundedMemory<T> : IDisposable where T : unmanaged
+    {
+        /// <summary>
+        /// Returns a value stating whether this native memory block is readonly.
+        /// </summary>
+        public abstract bool IsReadonly { get; }
+
+        /// <summary>
+        /// Gets the <see cref="Memory{Byte}"/> which represents this native memory.
+        /// This <see cref="BoundedMemory{T}"/> instance must be kept alive while working with the <see cref="Memory{Byte}"/>.
+        /// </summary>
+        public abstract Memory<T> Memory { get; }
+
+        /// <summary>
+        /// Gets the <see cref="Span{Byte}"/> which represents this native memory.
+        /// This <see cref="BoundedMemory{T}"/> instance must be kept alive while working with the <see cref="Span{Byte}"/>.
+        /// </summary>
+        public abstract Span<T> Span { get; }
+
+        /// <summary>
+        /// Disposes this <see cref="BoundedMemory{T}"/> instance.
+        /// </summary>
+        public abstract void Dispose();
+
+        /// <summary>
+        /// Sets this native memory block to be readonly. Writes to this block will cause an AV.
+        /// This method has no effect if the memory block is zero length or if the underlying
+        /// OS does not support marking the memory block as readonly.
+        /// </summary>
+        public abstract void MakeReadonly();
+
+        /// <summary>
+        /// Sets this native memory block to be read+write.
+        /// This method has no effect if the memory block is zero length or if the underlying
+        /// OS does not support marking the memory block as read+write.
+        /// </summary>
+        public abstract void MakeWriteable();
+    }
+}
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