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Description: Adding Release_CompareAndSwap 64-bit variant
While building Protobuf v3.5.0 (latest stable) facing an issue:
undefined reference to
`google::protobuf::internal::Release_CompareAndSwap(long volatile*,
long, long)'
Need to add 64-bit version for function : Release_CompareAndSwap
I had already raised an issue here : #3937
Author: Nayana-ibn
Bug-Debian: https://bugs.debian.org/1030311 https://bugs.debian.org/1103718
Origin: https://github.com/protocolbuffers/protobuf/pull/3955
Last-updated: 2025-04-21
---
diff --git a/third_party/protobuf/src/google/protobuf/stubs/atomicops_internals_generic_gcc.h b/third_party/protobuf/src/google/protobuf/stubs/atomicops_internals_generic_gcc.h
index 0b0b06c..075c406 100644
--- a/third_party/protobuf/src/google/protobuf/stubs/atomicops_internals_generic_gcc.h
+++ b/third_party/protobuf/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
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