Managing callback operations in emulated environments

• US 9,424,081 B2
• Filed: 12/15/2014
• Issued: 08/23/2016
• Est. Priority Date: 12/15/2014
• Status: Active Grant

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Inventors: Bond, Barry Clayton
• Primary Examiner(s): Khatri, Anil
• Application Number:
  US14/570,767
• Publication Number:
  US 20160170797A1
• Time in Patent Office: 617 Days
• Field of Search: 718/1, 718100-108, 717100-106
• US Class Current: 1/1
• CPC Class Codes: G06F 9/4812 by interrupt, e.g. masked

Abstract

Examples of the disclosure enable callback operations, such as interrupts, Asynchronous Procedure Calls (APCs), and Deferred Procedure Calls (DPCs), to be efficiently managed. In some examples, an emulated thread includes a request for a callback operation. When the request is detected, the emulated thread and/or a cooperating thread associated with the callback operation is executed based on an execution mode associated with the callback operation. Examples of the disclosure manage callback operations while efficiently managing system resources, including processor load, by providing at least one cooperating thread that consumes little or no processing power until the callback operation is ready to be executed.

Claims

1. A system comprising:

a memory area associated with a computing device, said memory area storing instructions for managing a callback; and

a processor programmed to;

execute an emulated thread;

detect a request for a first asynchronous callback operation, the first asynchronous callback operation associated with a first asynchronous callback thread;

determine a first execution mode associated with the first asynchronous callback operation; and

based on the first execution mode, adjust the execution of the emulated thread and execute the first asynchronous callback thread associated with the first asynchronous callback operation.

2. The system of claim 1, wherein the processor is further programmed to adjust the execution of the first asynchronous callback thread based on an identification of the first asynchronous callback thread and the first execution mode.

3. The system of claim 1, wherein the processor is further programmed to, based on the first execution mode:

simulate an interrupt of the emulated thread by blocking the emulated thread;

implement the first asynchronous callback operation while the interrupt is simulated;

block the first asynchronous callback thread; and

unblock the emulated thread.

4. The system of claim 1, wherein the processor is further programmed to, based on the first execution mode, execute the first asynchronous callback thread simultaneously with the emulated thread.

5. The system of claim 1, wherein the processor is further programmed to, based on the first execution mode, delay the execution of the first asynchronous callback thread.

6. The system of claim 1, wherein the processor is further programmed to, based on the first execution mode, determine not to execute the first asynchronous callback thread.

7. The system of claim 1, wherein the processor is further programmed to associate the first asynchronous callback thread with a parameter associated with the emulated thread.

8. The system of claim 1, wherein the processor is further programmed to:

detect a request for a second asynchronous callback operation, the second asynchronous callback operation associated with a second asynchronous callback thread;

determine a second execution mode associated with the emulated thread and the first asynchronous callback thread; and

based on the second execution mode,

execute one or more of the emulated thread, the first asynchronous callback thread, and the second asynchronous callback thread.

9. A method executing on a computing device for managing at least one callback operation, said method comprising:

executing, by a processor, a base thread;

detecting a request for a first callback operation, the first callback operation associated with a first callback thread;

based on a first execution mode associated with the first callback operation,

adjusting the execution of the base thread and executing the first callback thread.

10. The method of claim 9, wherein the execution of the first callback thread is adjusted based on an identification of the first callback thread and the first execution mode.

11. The method of claim 9, further comprising, based on the first execution mode, suspending an implementation of a base operation associated with the base thread.

12. The method of claim 9, further comprising, based on the first execution mode, executing the first callback thread simultaneously with the base thread.

13. The method of claim 9, further comprising, based on the first execution mode, delaying the execution of the first callback thread.

14. The method of claim 9, further comprising, based on the first execution mode, determining not to execute the first callback thread.

15. The method of claim 9, further comprising associating the first callback thread with a parameter associated with the base thread.

16. The method of claim 9, further comprising:

detecting a request for a second callback operation, the second callback operation associated with the first callback thread; and

based on a second execution mode associated with the second callback operation, executing the base thread and the first callback thread.

17. The method of claim 9, further comprising:

detecting a request for a second callback operation, the second callback operation associated with a second callback thread; and

based on a second execution mode associated with the second callback operation, executing the first callback thread and the second callback thread.

18. One or more computer storage media embodying computer-executable components, said components comprising:

a callback detection component that, when executed by at least one processor, causes the at least one processor to detect a request for a callback operation, and

determine an execution mode associated with the callback operation; and

a thread execution component that, when executed by the at least one processor, causes the at least one processor to execute a first thread including the request for the callback operation, and,

based on the execution mode, execute a second thread associated with the callback operation, wherein the execution of the first thread is adjusted based on the execution mode.

19. The computer storage media of claim 18, wherein the thread execution component, when executed by the at least one processor, further causes the at least one processor to, based on the execution mode, suspend an implementation of a base operation associated with the first thread, and implement the callback operation while the implementation of the base operation is suspended.

20. The computer storage media of claim 18, wherein the thread execution component, when executed by the at least one processor, further causes the at least one processor to, based on the execution mode, simultaneously implement the callback operation with a base operation associated with the first thread.