Multithreaded Access

Both the synchronous and the nonsynchronous C APIs are fully thread-safe and can be used simultaneously in multiple threads from the same process. Each thread must call hc_session_create_ez to create its own session. Sessions must not be shared between threads.

Name resolution must be done in a single thread with the subsequent IP address passed to hc_session_create_ez, otherwise core dumps will occur if multiple name resolution threads call getaddrinfo at the same time.