Method and systems for controlling access to a data object by means of locks

A computer readable medium comprising instructions for performing a method for accessing a data object having an identifier in a computer system, the method comprising:

• storing the ID in a second lock object;
• and
• determining whether the ID was stored successfully, and upon a successful storage, checking, before accessing the data object, whether the ID is contained in a first lock object and if the ID is contained in the first lock object, whether a link to a storage location is assigned to the ID in the first lock object, and if the link is not assigned to the ID, deleting the ID from the first lock object and performing a read and/or write access on the data object.

(canceled)

(canceled)

A computer system for processing data, comprising:

• means for storing an identifier (ID) in a second lock object;
• and
• means for determining whether the ID was stored successfully, and upon a successful storage, checking, before accessing the data object, whether the ID is contained in a first lock object and if the ID is contained in the first lock object, whether a link to a storage location is assigned to the ID in the first lock object, and if the link is not assigned to the ID, deleting the ID from the first lock object and performing a read and/or write access on the data object.