hazard pointers: Fix hazptr_tc_evict

Summary: Fix exit-time destructor warning for hazptr_tc_evict.

Differential Revision: D32099949

fbshipit-source-id: f9f12143f4d06fda1122c8a8d741d6381105253f

folly/synchronization/Hazptr-fwd.h

@@ -120,6 +120,7 @@ template <template <typename> class Atom = std::atomic>
 hazptr_tc<Atom>& hazptr_tc_tls();
 
 /** hazptr_tc_evict -- Used only for benchmarking */
+template <template <typename> class Atom = std::atomic>
 void hazptr_tc_evict();
 
 ///

folly/synchronization/HazptrThrLocal.h

@@ -87,7 +87,7 @@ class hazptr_tc {
   friend hazptr_holder<Atom> make_hazard_pointer<Atom>(hazptr_domain<Atom>&);
   template <uint8_t M, template <typename> class A>
   friend hazptr_array<M, A> make_hazard_pointer_array();
-  friend void hazptr_tc_evict();
+  friend void hazptr_tc_evict<Atom>();
 
   FOLLY_ALWAYS_INLINE
   hazptr_tc_entry<Atom>& operator[](uint8_t i) noexcept {
@@ -170,8 +170,9 @@ FOLLY_ALWAYS_INLINE hazptr_tc<Atom>& hazptr_tc_tls() {
 }
 
 /** hazptr_tc_evict -- Used only for benchmarking */
-inline void hazptr_tc_evict() {
-  hazptr_tc_tls<>().evict();
+template <template <typename> class Atom>
+void hazptr_tc_evict() {
+  hazptr_tc_tls<Atom>().evict();
 }
 
 } // namespace folly