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Event notification facility

  • US 5,828,882 A
  • Filed: 03/15/1996
  • Issued: 10/27/1998
  • Est. Priority Date: 03/15/1996
  • Status: Expired due to Term
First Claim
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1. An event notification facility for notifying one or more programs of an event, the event notification facility comprising:

  • (a) means for storing registration requests and for associating each registration request with a type of event, each registration request comprising;

    (i) an identification of a mechanism for notifying one of the one or more programs (registered program) when the event occurs and(ii) control information that instructs the event notification facility whether to notify the registered program after notifying all other programs of the event (notify the registered program last);

    (b) an interface, connected to the means for storing registration requests, for receiving registration requests from the one or more programs and for supplying the received requests to the storage means, each registration request from a requesting program comprising an identification of an event and control information that instructs the event notification facility whether to notify the requesting program last, wherein if the storage means already contains a registration request that instructs the event notification facility to notify one of the registered programs of the same event last, the interface rejects further registration requests that instruct the event notification facility to notify the requesting program last; and

    (c) means, connected to the means for storing registration requests, for notifying the registered programs when an event occurs, in accordance with the control information stored in the registration requests that are associated with the event.

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