Remote procedure execution

• US 5,423,042 A
• Filed: 10/23/1992
• Issued: 06/06/1995
• Est. Priority Date: 10/23/1992
• Status: Expired due to Term

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Jalili, Reza, Wooten, Wayne L.
• Primary Examiner(s): Heckler, Thomas M.
• Application Number:
  US07/965,656
• Time in Patent Office: 956 Days
• Field of Search: 395/650, 395/700
• US Class Current: 719/328
• CPC Class Codes: G06F 2209/549 Remote execution
• CPC Class Codes: G06F 9/445 Program loading or initiating bootstrapping G06F9/4401; security arrangements for program loading or initiating G06F21/57

Abstract

A computer server program is disclosed that can execute object code provided by one or more clients even though the server was not previously programmed to execute specific code. The server executes the client code without re-compiling or re-linking. Clients provide the server with executable object code along with information about the code that allows the server to register the code object. By manipulating the registration information stored on the server, the clients can make various requests of the server which affect the execution of the code. Using the registration and request functions of the server, clients direct the server when, if, and how often to run object code or parts of object code called functions.

Claims

1. A method of executing a modifiable function on a server comprising the steps of:

a. loading an executable code object into the server by a client program during execution of a server program;

b. registering one or more functions contained in the object into the server using registration information provided by the object, the registration information including a function pointer for determining a location of the function; and

c. executing the function, by the server, using the function pointer to locate the executed function.

2. A method of executing a modifiable function on a server, as in claim 1, where the registration information is stored in tables in server memory and the registration information can be modified by one or more requests.

3. A method of executing a modifiable function on a server, as in claim 2, where the registration information designates activity status of each of a plurality of functions and executes only active functions in a given loop of the server program.

4. A method of executing a modifiable function on a server, as in claim 3, where the registration information includes the priority of each of a plurality of functions and active functions are executed in a given loop of the server program in a priority order.

5. A method of executing a modifiable function on a server, as in claim 4, where the registration information includes a repeat_-- count value of each of a plurality of functions and the function is run in a number of server program loops as determined by the repeat count_-- value.

6. A method of executing a modifiable function on a server, as in claim 2, where a client request can UNREGISTER an object by changing the registering information after which the functions of the unregistered object are no longer executed by the server.

7. A method of executing a modifiable function on a server, as in claim 2, where the client requests the server to ACTIVATE a function by changing the registration information after which the function will be executed in at least one server loop.

8. A method of executing a modifiable function on a server, as in claim 2, where the client requests the server to DEACTIVATE a function by changing the registration information after which the function will not be executed in a server loop.

9. A method of executing a modifiable function on a server, as in claim 2, where the client requests the server to CALL a function by changing the registration information after which the function is executed.

10. A method of executing a modifiable function on a server, as in claim 2, where the client requests the server to SET FUNCTION DATA after which the function has new data to use as an argument.

11. A method of executing a modifiable function on a server, as in claim 2, where the client requests the server to GET FUNCTION DATA after which the server returns the results of a previously executed function to the client.

12. A method of executing a modifiable function on a server, as in claim 2, where the client requests the server to SET PRIORITY after which the function is executed in a different sequence in the server loop.

13. A method of executing a modifiable function on a server, as in claim 1, where the server program characteristics are changed by a function on which runs in an infinite loop which does not return to the server when called.

14. A method of a client executing one or more modifiable functions on a server comprising the steps of:

sending executable object code and an object_-- type name from the client to the server;

loading the object code, object_-- type name and an entry function pointer into a first part of server memory;

storing information about one or more functions in a second part of the reserved server memory by running an entry function;

organizing information about each function in a priority order in a third part of server memory; and

executing the functions in the order in which they are organized.

15. A method of a client executing one or more modifiable functions on a server, as in claim 14, where the client sends the server the object_-- type name and a file name which is the name of the file holding the object code.

16. A method of a client executing one or more modifiable functions on a server, as in claim 14, where the information includes a designation for client instance.

17. A method of a client executing one or more modifiable functions on a server, as in claim 14, where the functions are only executed if the function information indicates that the function is activated.

18. A method of a client executing one or more modifiable functions on a server, as in claim 14, where the second part of server memory is a function_-- table and the third part of server memory is an exec_-- table.

19. A method of a client executing one or more modifiable functions on a server, as in claim 18, where for each function the function_-- table has a field for a pointer means for calling a function and the exec_-- table has a field for activity status.

20. A method of a client executing one or more modifiable functions on a server, as in claim 14, where the functions are only executed if the function has an active status.

21. A method of a client executing one or more modifiable functions on a server, as in claim 14, where the order of execution can be changed by changing a priority of the function.

22. A method of a client executing one or more modifiable functions on a server, as in claim 14, where a function is prevented from executing by setting its active status to INACTIVE.

23. A method of a client executing one or more modifiable functions on a server, as in claim 14, where the function is executed in each loop of the server for a total number of executions determined by a repeat_-- count value in server memory.

24. A method of a client executing one or more modifiable functions on a server, as in claim 14, where the functions are used to generate and display graphical images.

25. A method of a plurality of clients executing one or more modifiable functions on a server, as in claim 24, where each client has control of part of a screen display.

26. A method of a client executing one or more modifiable functions on a server, as in claim 14, where the client can protect the executable object code it sends to the server from being run by other clients.

27. A method of a client executing one or more modifiable functions on a server, as in claim 14, where the client executes the functions in an order given by a program.

28. A method of a client executing one or more modifiable functions on a server, as in claim 27, where the program executing the functions is an object running on the server.

29. A method of a client executing one or more modifiable functions on a server, as in claim 14, where the server provides a graphical interface to a user.

30. A method of a client executing one or more modifiable functions on a server, as in claim 29, where the graphical interface is used to display information about functions stored in server memory.

31. A method of a client executing one or more modifiable functions on a server, as in claim 29, where the graphical interface is used to make requests of the server.