From 73b86e6dff528ab79bce0ff33ec4d2144048ee0b Mon Sep 17 00:00:00 2001
From: Nathaniel Filardo <nfilardo@microsoft.com>
Date: Mon, 15 Mar 2021 18:40:34 +0000
Subject: [PATCH] NFC: Introduce skeletal ds/ptrwrap.h

This lets us go ahead and land several preparatory commits without waiting for
the real AuthPtr<> types to show up.
---
 src/ds/ptrwrap.h | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 src/ds/ptrwrap.h

diff --git a/src/ds/ptrwrap.h b/src/ds/ptrwrap.h
new file mode 100644
index 0000000..a65d034
--- /dev/null
+++ b/src/ds/ptrwrap.h
@@ -0,0 +1,18 @@
+#pragma once
+
+#include <atomic>
+
+namespace snmalloc
+{
+  /**
+   * To assist in providing a uniform interface regardless of pointer wrapper,
+   * we also export intrinsic pointer and atomic pointer aliases, as the postfix
+   * type constructor '*' does not work well as a template parameter and we
+   * don't have inline type-level functions.
+   */
+  template<typename T>
+  using Pointer = T*;
+
+  template<typename T>
+  using AtomicPointer = std::atomic<T*>;
+} // namespace snmalloc