Use nint for native-sized integers in Volatile (#118360)

Author: xtqqczze

src/libraries/System.Private.CoreLib/src/System/Threading/Thread.cs

@@ -586,7 +586,7 @@ public void SetCompressedStack(CompressedStack stack)
         public static long VolatileRead(ref long address) => Volatile.Read(ref address);
         [Obsolete(Obsoletions.ThreadVolatileReadWriteMessage, DiagnosticId = Obsoletions.ThreadVolatileReadWriteDiagId, UrlFormat = Obsoletions.SharedUrlFormat)]
         [EditorBrowsable(EditorBrowsableState.Never)]
-        public static IntPtr VolatileRead(ref IntPtr address) => Volatile.Read(ref address);
+        public static nint VolatileRead(ref nint address) => Volatile.Read(ref address);
         [Obsolete(Obsoletions.ThreadVolatileReadWriteMessage, DiagnosticId = Obsoletions.ThreadVolatileReadWriteDiagId, UrlFormat = Obsoletions.SharedUrlFormat)]
         [EditorBrowsable(EditorBrowsableState.Never)]
         [return: NotNullIfNotNull(nameof(address))]
@@ -613,7 +613,7 @@ public void SetCompressedStack(CompressedStack stack)
         [Obsolete(Obsoletions.ThreadVolatileReadWriteMessage, DiagnosticId = Obsoletions.ThreadVolatileReadWriteDiagId, UrlFormat = Obsoletions.SharedUrlFormat)]
         [EditorBrowsable(EditorBrowsableState.Never)]
         [CLSCompliant(false)]
-        public static UIntPtr VolatileRead(ref UIntPtr address) => Volatile.Read(ref address);
+        public static nuint VolatileRead(ref nuint address) => Volatile.Read(ref address);
         [Obsolete(Obsoletions.ThreadVolatileReadWriteMessage, DiagnosticId = Obsoletions.ThreadVolatileReadWriteDiagId, UrlFormat = Obsoletions.SharedUrlFormat)]
         [EditorBrowsable(EditorBrowsableState.Never)]
         public static void VolatileWrite(ref byte address, byte value) => Volatile.Write(ref address, value);
@@ -631,7 +631,7 @@ public void SetCompressedStack(CompressedStack stack)
         public static void VolatileWrite(ref long address, long value) => Volatile.Write(ref address, value);
         [Obsolete(Obsoletions.ThreadVolatileReadWriteMessage, DiagnosticId = Obsoletions.ThreadVolatileReadWriteDiagId, UrlFormat = Obsoletions.SharedUrlFormat)]
         [EditorBrowsable(EditorBrowsableState.Never)]
-        public static void VolatileWrite(ref IntPtr address, IntPtr value) => Volatile.Write(ref address, value);
+        public static void VolatileWrite(ref nint address, nint value) => Volatile.Write(ref address, value);
         [Obsolete(Obsoletions.ThreadVolatileReadWriteMessage, DiagnosticId = Obsoletions.ThreadVolatileReadWriteDiagId, UrlFormat = Obsoletions.SharedUrlFormat)]
         [EditorBrowsable(EditorBrowsableState.Never)]
         public static void VolatileWrite([NotNullIfNotNull(nameof(value))] ref object? address, object? value) => Volatile.Write(ref address, value);
@@ -657,7 +657,7 @@ public void SetCompressedStack(CompressedStack stack)
         [Obsolete(Obsoletions.ThreadVolatileReadWriteMessage, DiagnosticId = Obsoletions.ThreadVolatileReadWriteDiagId, UrlFormat = Obsoletions.SharedUrlFormat)]
         [EditorBrowsable(EditorBrowsableState.Never)]
         [CLSCompliant(false)]
-        public static void VolatileWrite(ref UIntPtr address, UIntPtr value) => Volatile.Write(ref address, value);
+        public static void VolatileWrite(ref nuint address, nuint value) => Volatile.Write(ref address, value);
 
         /// <summary>
         /// Manages functionality required to support members of <see cref="Thread"/> dealing with thread-local data

src/libraries/System.Private.CoreLib/src/System/Threading/Volatile.cs

@@ -107,17 +107,17 @@ public static void Write(ref long location, long value) =>
         #endregion
 
         #region IntPtr
-        private struct VolatileIntPtr { public volatile IntPtr Value; }
+        private struct VolatileIntPtr { public volatile nint Value; }
 
         [Intrinsic]
         [NonVersionable]
-        public static IntPtr Read(ref readonly IntPtr location) =>
-            Unsafe.As<IntPtr, VolatileIntPtr>(ref Unsafe.AsRef(in location)).Value;
+        public static nint Read(ref readonly nint location) =>
+            Unsafe.As<nint, VolatileIntPtr>(ref Unsafe.AsRef(in location)).Value;
 
         [Intrinsic]
         [NonVersionable]
-        public static void Write(ref IntPtr location, IntPtr value) =>
-            Unsafe.As<IntPtr, VolatileIntPtr>(ref location).Value = value;
+        public static void Write(ref nint location, nint value) =>
+            Unsafe.As<nint, VolatileIntPtr>(ref location).Value = value;
         #endregion
 
         #region SByte
@@ -197,19 +197,19 @@ public static void Write(ref ulong location, ulong value) =>
         #endregion
 
         #region UIntPtr
-        private struct VolatileUIntPtr { public volatile UIntPtr Value; }
+        private struct VolatileUIntPtr { public volatile nuint Value; }
 
         [CLSCompliant(false)]
         [Intrinsic]
         [NonVersionable]
-        public static UIntPtr Read(ref readonly UIntPtr location) =>
-            Unsafe.As<UIntPtr, VolatileUIntPtr>(ref Unsafe.AsRef(in location)).Value;
+        public static nuint Read(ref readonly nuint location) =>
+            Unsafe.As<nuint, VolatileUIntPtr>(ref Unsafe.AsRef(in location)).Value;
 
         [CLSCompliant(false)]
         [Intrinsic]
         [NonVersionable]
-        public static void Write(ref UIntPtr location, UIntPtr value) =>
-            Unsafe.As<UIntPtr, VolatileUIntPtr>(ref location).Value = value;
+        public static void Write(ref nuint location, nuint value) =>
+            Unsafe.As<nuint, VolatileUIntPtr>(ref location).Value = value;
         #endregion
 
         #region T