mysql_thread_end - mariadb-corporation/mariadb-connector-c GitHub Wiki
mysql_thread_end - Releases thread specific memory
#include <mysql.h>
void mysql_thread_end(void );
The mysql_thread_end() function needs to be called before a client thread ends. It will release thread specific memory, which was allocated by a previous mysql_thread_init() call. Returns void.
Unlike mysql_thread_init() mysql_thread_end() will not be invoked automatically if the thread ends. To avoid memory leaks mysql_thread_end() must be called explicitly.
This function is deprecated since MariaDB Connector/C 3.0.0.