Hitachi, Ltd.

Yasutaka Yamaguchi

Hiroshi Tomita

Tetsuo Tanaka

Atsuhiko Hirota

Toshihiro Hayashi

Takashi Owaki

In a system allowing an application program (client) to call a procedure of another application program (server), when the client requests the server to supply a procedure call syntax, the server writes the procedure call syntax in a link management table. Thereafter, when the client searches the procedure call syntax from the link management table and calls the procedure, the server executes the procedure. Upon request of the procedure call, the server writes the procedure name and argument list specific to the server in the link management record. It is therefore unnecessary to consider the procedure call method when the client makes application programs.

Negotiation method for calling procedures located within other objects

In a computer system for parallelly executing a plurality of tasks by sharing a plurality of resources in a data base of a computer, a use sequence of the resources to be used by each task is inputted to the computer prior to the execution of the tasks. A possibility of deadlock due to sharing of common resources amojng the tasks is checked based on the information on the use sequence, and a deadlock avoidance information table is prepared. When the task issues a start request, the deadlock avoidance information table is referred and the start of the task which has the possibility of the deadlock is delayed.

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Yokohama, Japan

Yasutaka Yamaguchi