adapter/darwin: atomic sync experiments

e-dant · Mar 8, 2024 · 235691d · 235691d
1 parent 4d301f8
commit 235691d
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Showing 2 changed files with 18 additions and 4 deletions.
diff --git a/devel/include/detail/wtr/watcher/synchronized.hpp b/devel/include/detail/wtr/watcher/synchronized.hpp
@@ -34,11 +34,18 @@ class Synchronized {
     bool exchange_when_current_is,
     bool want_value) -> bool
   {
+#ifdef WTR_ALLOW_NON_SEQUENTIAL_CONSISTENCY
+    constexpr auto relord = std::memory_order_release;
+    constexpr auto acqord = std::memory_order_acquire;
+#else
+    constexpr auto relord = std::memory_order_seq_cst;
+    constexpr auto acqord = std::memory_order_seq_cst;
+#endif
     return current_value.compare_exchange_strong(
       exchange_when_current_is,
       want_value,
-      std::memory_order_release,
-      std::memory_order_acquire);
+      acqord,
+      relord);
   }
 
   inline static auto try_take(std::atomic<bool>& owner_flag) -> bool

diff --git a/include/wtr/watcher.hpp b/include/wtr/watcher.hpp
@@ -502,11 +502,18 @@ class Synchronized {
     bool exchange_when_current_is,
     bool want_value) -> bool
   {
+#ifdef WTR_ALLOW_NON_SEQUENTIAL_CONSISTENCY
+    constexpr auto relord = std::memory_order_release;
+    constexpr auto acqord = std::memory_order_acquire;
+#else
+    constexpr auto relord = std::memory_order_seq_cst;
+    constexpr auto acqord = std::memory_order_seq_cst;
+#endif
     return current_value.compare_exchange_strong(
       exchange_when_current_is,
       want_value,
-      std::memory_order_release,
-      std::memory_order_acquire);
+      acqord,
+      relord);
   }
 
   inline static auto try_take(std::atomic<bool>& owner_flag) -> bool