Struct RegistryClientHandle 

pub struct RegistryClientHandle { /* private fields */ }

FFI handle for a RegistryClient.

The inner client is wrapped in a RwLock so concurrent ops (entry points are called from many threads in async runtimes) can share read access while a set_deadline writer serializes. last_error_detail lives behind a separate parking_lot::Mutex; the lifetime contract for pointers returned by net_registry_last_error_detail is “valid until the next op on this handle or until free”.