Method and system for notifying clients of a specific change in a data processing system

• US 7,203,778 B2
• Filed: 09/17/2004
• Issued: 04/10/2007
• Est. Priority Date: 05/04/1999
• Status: Expired due to Term

• Current Assignee: Apple Inc.
• Original Assignee: Apple Inc.
• Inventors: Clark, Thomas C.
• Primary Examiner(s): Ray; Gopal C.
• Application Number:
  US10/944,100
• Publication Number:
  US 20050177651A1
• Time in Patent Office: 935 Days
• Field of Search: 710300-304, 710/104, 710 8- 19, 713/1, 713/2, 713/100, 709/203, 709/223, 719/318
• US Class Current: 710/104
• CPC Class Codes: G06F 13/4081 Live connection to bus, e.g. hot-plugging current or voltage limitation during live insertion H02H9/004
• CPC Class Codes: G06F 2213/0042 Universal serial bus [USB]
• CPC Class Codes: G06F 9/4401 Bootstrapping security arrangements therefor G06F21/57
• CPC Class Codes: G06F 9/4413 Plug-and-play [PnP]

Abstract

A method of notifying clients of a change in a USB including a first client requesting notification of a first change in the USB, detecting the first change in the USB, and notifying the first client requesting notification that the first change in the USB occurred.

Claims

1. A method for notifying clients of a specific change in a data processing system, the method comprising:

in response to a first request from a client for notification of a specific change in the data processing system, adding the first request to a list of requests for notification;

in response to detecting the specific change in the data processing system, notifying the client originating the first request regarding the specific change, according to one or more parameters of the first request stored in the list of the requests for notification; and

in response to a second request from the client for terminating notification of the specific change, removing the first request from the list of requests for notification, such that the client is not notified of the specific change subsequently occurring after the removing.

2. The method of claim 1, wherein adding and/or removing the first request is performed in a first cycle and detecting the specific change is performed in a second cycle different than the first cycle.

3. The method of claim 1, wherein the specific change of the data processing system comprises connecting a peripheral device to the data processing system.

4. The method of claim 1, wherein the specific change of the data processing system comprises disconnecting a peripheral device from the data processing system.

5. The method of claim 1, wherein the first request comprises a callback routine of the client, and wherein notifying the client comprises calling the callback routine to notify the client.

6. A machine-readable medium having instructions, when executed by a machine, cause the machine to perform a method for notifying clients of a specific change in a data processing system, the method comprising:

in response to a first request from a client for notification of a specific change in the data processing system, adding the first request to a list of requests for notification;

in response to detecting the specific change in the data processing system, notifying the client originating the first request regarding the specific change, according to one or more parameters of the first request stored in the list of the requests for notification; and

in response to a second request from the client for terminating notification of the specific change, removing the first request from the list of requests for notification, such that the client is not notified of the specific change subsequently occurring after the removing.

7. The machine-readable medium of claim 6, wherein adding and/or removing the first request is performed in a first cycle and detecting the specific change is performed in a second cycle different than the first cycle.

8. The machine-readable medium of claim 6, wherein the specific change of the data processing system comprises connecting a peripheral device to the data processing system.

9. The machine-readable medium of claim 6, wherein the specific change of the data processing system comprises disconnecting a peripheral device from the data processing system.

10. The machine-readable medium of claim 6, wherein the first request comprises a callback routine of the client, and wherein notifying the client comprises calling the callback routine to notify the client.

11. An apparatus for notifying clients of a specific change in a data processing system, the apparatus comprising:

means for adding, in response to a first request from a client for notification of a specific change in the data processing system, the first request to a list of requests for notification;

means for notifying, in response to detecting the specific change in the data processing system, the client originating the first request regarding the specific change, according to one or more parameters of the first request stored in the list of the requests for notification; and

means for removing, in response to a second request from the client for terminating notification of the specific change, the first request from the list of requests for notification, such that the client is not notified of the specific change subsequently occurring after the removing.

12. The apparatus of claim 11, wherein adding and/or removing the first request is performed in a first cycle and detecting the specific change is performed in a second cycle different than the first cycle.

13. The apparatus of claim 11, wherein the specific change of the data processing system comprises connecting a peripheral device to the data processing system.

14. The apparatus of claim 11, wherein the specific change of the data processing system comprises disconnecting a peripheral device from the data processing system.

15. The apparatus of claim 11, wherein the first request comprises a callback routine of the client, and wherein notifying the client comprises calling the callback routine to notify the client.

16. A data processing system, comprising:

a processor; and

a memory coupled to the processor for storing instructions, when executed from the memory, cause the processor to perform a method, the method including in response to a first request from a client for notification of a specific change in the data processing system, adding the first request to a list of requests for notification,

in response to detecting the specific change in the data processing system, notifying the client originating the first request regarding the specific change, according to one or more parameters of the first request stored in the list of the requests for notification, and

in response to a second request from the client for terminating notification of the specific change, removing the first request from the list of requests for notification, such that the client is not notified of the specific change subsequently occurring after the removing.

17. The system of claim 16, wherein adding and/or removing the first request is performed in a first cycle and detecting the specific change is performed in a second cycle different than the first cycle.

18. The system of claim 16, wherein the specific change of the data processing system comprises connecting a peripheral device to the data processing system.

19. The system of claim 16, wherein the specific change of the data processing system comprises disconnecting a peripheral device from the data processing system.

20. The system of claim 16, wherein the first request comprises a callback routine of the client, and wherein notifying the client comprises calling the callback routine to notify the client.