Movatterモバイル変換

Allocates or initializes aMYSQL object suitable formysql_real_connect(). Ifmysql is aNULL pointer, the function allocates, initializes, and returns a new object. Otherwise, the object is initialized and the address of the object is returned. Ifmysql_init() allocates a new object, it is freed whenmysql_close() is called to close the connection.

In a nonmultithreaded environment,mysql_init() invokesmysql_library_init() automatically as necessary. However,mysql_library_init() is not thread-safe in a multithreaded environment, and thus neither ismysql_init(). Before callingmysql_init(), either callmysql_library_init() prior to spawning any threads, or use a mutex to protect themysql_library_init() call. This should be done prior to any other client library call.

An initializedMYSQL* handler.NULL if there was insufficient memory to allocate a new object.

In case of insufficient memory,NULL is returned.