ares_threadsafety - Query if c-ares was built with thread-safety

#include <ares.h>
ares_bool_t ares_threadsafety(void);

The ares_threadsafety(3) function returns if the library was built with thread safety enabled or not.

As of c-ares 1.23.0, this simply means that every public function which references an ares_channel_t object will lock the channel on entry and release the lock on exit of the function. This will prevent concurrent thread access to the channel, thus ensuring no corruption can occur.

As of c-ares 1.26.0, this also indicates if ARES_OPT_EVENT_THREAD can be passed to ares_init_options(3).

ares_threadsafety(3) can return any of the following values:

Built with thread safety.
Built without thread safety

This function was first introduced in c-ares version 1.23.0.

ares_init(3), ares_init_options(3), ares_destroy(3), ares_dup(3), ares_library_init(3), ares_set_servers(3)

Copyright (C) 2023 The c-ares project and its members.

26 November 2023