Move c++ code from my_atomic.h to my_atomic_wrapper.h

This is because it breaks code that is using extern "C" when including
my_atomic, which is the case with ha_s3.cc

1 files changed, 0 insertions, 45 deletions

diff --git a/include/my_atomic.h b/include/my_atomic.h
index 88f6746ba3d..81da9e35cf9 100644
--- a/include/my_atomic.h
+++ b/include/my_atomic.h
@@ -169,49 +169,4 @@
 #define my_atomic_casptr_strong_explicit(P, E, D, S, F) \
   my_atomic_casptr((P), (E), (D))
 #endif
-
-#ifdef __cplusplus
-#include <atomic>
-/**
-  A wrapper for std::atomic, defaulting to std::memory_order_relaxed.
-
-  When it comes to atomic loads or stores at std::memory_order_relaxed
-  on IA-32 or AMD64, this wrapper is only introducing some constraints
-  to the C++ compiler, to prevent some optimizations of loads or
-  stores.
-
-  On POWER and ARM, atomic loads and stores involve different instructions
-  from normal loads and stores and will thus incur some overhead.
-
-  Because atomic read-modify-write operations will always incur
-  overhead, we intentionally do not define
-  operator++(), operator--(), operator+=(), operator-=(), or similar,
-  to make the overhead stand out in the users of this code.
-*/
-template <typename Type> class Atomic_relaxed
-{
-  std::atomic<Type> m;
-public:
-  Atomic_relaxed(const Atomic_relaxed<Type> &rhs)
-  { m.store(rhs, std::memory_order_relaxed); }
-  Atomic_relaxed(Type val) : m(val) {}
-  Atomic_relaxed() {}
-
-  operator Type() const { return m.load(std::memory_order_relaxed); }
-  Type operator=(const Type val)
-  { m.store(val, std::memory_order_relaxed); return val; }
-  Type operator=(const Atomic_relaxed<Type> &rhs) { return *this= Type{rhs}; }
-  Type fetch_add(const Type i, std::memory_order o= std::memory_order_relaxed)
-  { return m.fetch_add(i, o); }
-  Type fetch_sub(const Type i, std::memory_order o= std::memory_order_relaxed)
-  { return m.fetch_sub(i, o); }
-  bool compare_exchange_strong(Type& i1, const Type i2,
-                               std::memory_order o1= std::memory_order_relaxed,
-                               std::memory_order o2= std::memory_order_relaxed)
-  { return m.compare_exchange_strong(i1, i2, o1, o2); }
-  Type exchange(const Type i, std::memory_order o= std::memory_order_relaxed)
-  { return m.exchange(i, o); }
-};
-#endif /* __cplusplus */
-
 #endif /* MY_ATOMIC_INCLUDED */