From 25e5ecdf82b49977e86bfaded236fb34af2705ed Mon Sep 17 00:00:00 2001
From: Thomas Rodgers <rodgert@appliantology.com>
Date: Tue, 8 Jun 2021 15:51:53 -0700
Subject: [PATCH] libstdc++: Fix Wrong param type in :atomic_ref<_Tp*>::wait
 [PR100889]

libstdc++-v3/ChangeLog:

	PR libstdc++/100889
	* include/bits/atomic_base.h (atomic_ref<_Tp*>::wait):
	Change parameter type from _Tp to _Tp*.
	* testsuite/29_atomics/atomic_ref/wait_notify.cc: Extend
	coverage of types tested.
---
 libstdc++-v3/include/bits/atomic_base.h            |  2 +-
 .../testsuite/29_atomics/atomic_ref/wait_notify.cc | 38 ++++++++++++++--------
 2 files changed, 26 insertions(+), 14 deletions(-)

diff --git a/libstdc++-v3/include/bits/atomic_base.h b/libstdc++-v3/include/bits/atomic_base.h
index 029b8ad..20cf134 100644
--- a/libstdc++-v3/include/bits/atomic_base.h
+++ b/libstdc++-v3/include/bits/atomic_base.h
@@ -1870,7 +1870,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 
 #if __cpp_lib_atomic_wait
       _GLIBCXX_ALWAYS_INLINE void
-      wait(_Tp __old, memory_order __m = memory_order_seq_cst) const noexcept
+      wait(_Tp* __old, memory_order __m = memory_order_seq_cst) const noexcept
       { __atomic_impl::wait(_M_ptr, __old, __m); }
 
       // TODO add const volatile overload
diff --git a/libstdc++-v3/testsuite/29_atomics/atomic_ref/wait_notify.cc b/libstdc++-v3/testsuite/29_atomics/atomic_ref/wait_notify.cc
index 2fd3130..003b86c 100644
--- a/libstdc++-v3/testsuite/29_atomics/atomic_ref/wait_notify.cc
+++ b/libstdc++-v3/testsuite/29_atomics/atomic_ref/wait_notify.cc
@@ -26,22 +26,34 @@
 
 #include <testsuite_hooks.h>
 
+template<typename S>
+  void
+  test (S va, S vb)
+  {
+    S aa{ va };
+    S bb{ vb };
+    std::atomic_ref<S> a{ aa };
+    a.wait(bb);
+    std::thread t([&]
+      {
+	a.store(bb);
+	a.notify_one();
+      });
+    a.wait(aa);
+    t.join();
+  }
+
 int
 main ()
 {
+  test<int>(0, 42);
+  test<long>(0, 42);
+  test<unsigned>(0u, 42u);
+  test<float>(0.0f, 42.0f);
+  test<double>(0.0, 42.0);
+  test<void*>(nullptr, reinterpret_cast<void*>(42));
+
   struct S{ int i; };
-  S aa{ 0 };
-  S bb{ 42 };
-
-  std::atomic_ref<S> a{ aa };
-  VERIFY( a.load().i == aa.i );
-  a.wait(bb);
-  std::thread t([&]
-    {
-      a.store(bb);
-      a.notify_one();
-    });
-  a.wait(aa);
-  t.join();
+  test<S>(S{ 0 }, S{ 42 });
   return 0;
 }
-- 
2.7.4