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https://github.com/protocolbuffers/protobuf/issues/3937
https://github.com/protocolbuffers/protobuf/pull/3955
https://github.com/protocolbuffers/protobuf/commit/642e1ac635f2563b4a14c255374f02645ae85dac
--- /src/google/protobuf/stubs/atomicops_internals_generic_gcc.h
+++ /src/google/protobuf/stubs/atomicops_internals_generic_gcc.h
@@ -146,6 +146,14 @@
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
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