MySQL C API: Init, connect and close memory leak

[Sen7inel]

MySQL 4.0.17, Visual C++ .NET & compiling against mysqlclient.lib

Quick n dirty:

MYSQL sql;
mysql_init(&sql);
mysql_real_connect(&sql, ..);
mysql_close(&sql);

This causes a memory leak (with or without mysql_thread_end).. Any ideas, workarounds or fixes?

Also see

http://bugs.mysql.com/bug.php?id=1772

which is pretty much the same.

 

[cdlvj]

You need to check the return from the init.
If the value passed to connect is NULL, then it will fail.

11.1.3.31 mysql_init()

MYSQL *mysql_init(MYSQL *mysql)

Description
Allocates or initializes a MYSQL object suitable for mysql_real_connect(). If mysql is a NULL pointer, the function allocates, initializes, and returns a new object. Otherwise, the object is initialized and the address of the object is returned. If mysql_init() allocates a new object, it will be freed when mysql_close() is called to close the connection.

Return Values
An initialized MYSQL* handle. NULL if there was insufficient memory to allocate a new object.

Errors
In case of insufficient memory, NULL is returned.