| diff --git a/src/google/protobuf/stubs/atomicops_internals_generic_gcc.h b/src/google/protobuf/stubs/atomicops_internals_generic_gcc.h |
| index 0b0b06c..075c406 100644 |
| --- a/src/google/protobuf/stubs/atomicops_internals_generic_gcc.h |
| +++ b/src/google/protobuf/stubs/atomicops_internals_generic_gcc.h |
| @@ -146,6 +146,14 @@ inline Atomic64 NoBarrier_Load(volatile const Atomic64* ptr) { |
| return __atomic_load_n(ptr, __ATOMIC_RELAXED); |
| } |
| |
| +inline Atomic64 Release_CompareAndSwap(volatile Atomic64* ptr, |
| + Atomic64 old_value, |
| + Atomic64 new_value) { |
| + __atomic_compare_exchange_n(ptr, &old_value, new_value, false, |
| + __ATOMIC_RELEASE, __ATOMIC_ACQUIRE); |
| + return old_value; |
| +} |
| + |
| #endif // defined(__LP64__) |
| |
| } // namespace internal |
