# Berkeley DB Reference Guide: Release 3.0: lock_put
Berkeley DB: An embedded database programmatic toolkit.
Keywords: embedded,database,programmatic,toolkit,b+tree,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,Java,C,C++

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Berkeley DB Reference Guide:
  Upgrading Berkeley DB Applications

### Release 3.0: lock_put

An argument change has been made in the lock_put function.

The application should be searched for any occurrences of lock_put. For each one, instead of passing a DB_LOCK variable as the last argument to the function, the address of the DB_LOCK variable should be passed.

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