Baton::ready, a const variant of try_wait

[folly.git] / folly / AtomicStruct.h

diff --git a/folly/AtomicStruct.h b/folly/AtomicStruct.h
index 1fb151cbc25b3fc1d7ba155e2b6c74290aebe1e0..a774d31500fd952afd49e1a326560d30e3c5eaa6 100644 (file)
--- a/folly/AtomicStruct.h
+++ b/folly/AtomicStruct.h
@@ -16,23 +16,24 @@
 
 #pragma once
 
-#include <atomic>
-#include <type_traits>
 #include <folly/Traits.h>
-#include <string.h>
+#include <folly/synchronization/detail/AtomicUtils.h>
 #include <stdint.h>
+#include <string.h>
+#include <atomic>
+#include <type_traits>
 
 namespace folly {
 
 namespace detail {
 template <int N> struct AtomicStructIntPick {};
-}
+} // namespace detail
 
 /// AtomicStruct<T> work like C++ atomics, but can be used on any POD
 /// type <= 8 bytes.
 template <
     typename T,
-    template<typename> class Atom = std::atomic,
+    template <typename> class Atom = std::atomic,
     typename Raw = typename detail::AtomicStructIntPick<sizeof(T)>::type>
 class AtomicStruct {
   static_assert(alignof(T) <= alignof(Raw),
@@ -75,10 +76,19 @@ class AtomicStruct {
   }
 
   bool compare_exchange_strong(
-          T& v0, T v1,
-          std::memory_order mo = std::memory_order_seq_cst) noexcept {
+      T& v0,
+      T v1,
+      std::memory_order mo = std::memory_order_seq_cst) noexcept {
+    return compare_exchange_strong(
+        v0, v1, mo, detail::default_failure_memory_order(mo));
+  }
+  bool compare_exchange_strong(
+      T& v0,
+      T v1,
+      std::memory_order success,
+      std::memory_order failure) noexcept {
     Raw d0 = encode(v0);
-    bool rv = data.compare_exchange_strong(d0, encode(v1), mo);
+    bool rv = data.compare_exchange_strong(d0, encode(v1), success, failure);
     if (!rv) {
       v0 = decode(d0);
     }
@@ -86,10 +96,19 @@ class AtomicStruct {
   }
 
   bool compare_exchange_weak(
-          T& v0, T v1,
-          std::memory_order mo = std::memory_order_seq_cst) noexcept {
+      T& v0,
+      T v1,
+      std::memory_order mo = std::memory_order_seq_cst) noexcept {
+    return compare_exchange_weak(
+        v0, v1, mo, detail::default_failure_memory_order(mo));
+  }
+  bool compare_exchange_weak(
+      T& v0,
+      T v1,
+      std::memory_order success,
+      std::memory_order failure) noexcept {
     Raw d0 = encode(v0);
-    bool rv = data.compare_exchange_weak(d0, encode(v1), mo);
+    bool rv = data.compare_exchange_weak(d0, encode(v1), success, failure);
     if (!rv) {
       v0 = decode(d0);
     }