Methods and systems for deterministic and multithreaded script objects and script engine

1. A method for enabling multiple instances of a single-threaded script engine to operate concurrently, the method comprising:

executing, by a computing device, a first instance of a single-threaded script engine in a first thread associated with a first execution context, wherein the first instance of the single-threaded script engine accesses at least one shared script object through a first reference counted script base value object; and

concurrently executing, by the computing device, a second instance of the single-threaded script engine in a second thread associated with a second execution context, wherein the second instance of the single-threaded script engine accesses the at least one shared script object through a second reference counted script base value object, wherein the script engine does not switch between the execution contexts.

2. The method of claim 1 , wherein the at least one shared script object is a reference counted script base object having a first property and a first thread-safe set method for setting a value of the first property, and wherein said method further comprises setting the value of the first property by executing the first thread-safe set method using at least one of the first instance of the single-threaded script engine and the second instance of the single-threaded script engine.

3. The method of claim 1 , wherein the at least one shared script object is a reference counted script base object having a first property and a first thread-safe get method for getting a value of the first property, and wherein said method further comprises getting the value of the first property by executing the first get method using at least one of the first instance of the single-threaded script engine within the first execution context and the second instance of the single-threaded script engine within the second execution context.

4. The method of claim 1 , wherein the computing device is coupled to a memory device, and wherein said method further comprises determining a number of outside references to the at least one shared script object and releasing the at least one shared script object from the memory device if the number of outside references to the at least one shared script object is zero.

5. The method of claim 1 , wherein properties of the at least one shared script object reference a plurality of shared script objects and wherein said method further comprises detecting a reference loop among the plurality of shared script objects.

6. The method of claim 1 , wherein the computing device is coupled to at least one component of at least one machine and wherein said method further comprises controlling the at least one component with the first instance of the script engine and the second instance of the script engine using the at least one shared script object.

7. A non-transitory computer-readable storage device having processor-executable instructions embodied thereon wherein, when executed by a computing device having a processor, the computer-executable instructions cause the computing device to:

execute a first instance of a single-threaded script engine in a first thread associated with a first execution context, wherein the first instance of the single-threaded script engine accesses at least one shared script object through a first reference counted script base value object; and

concurrently execute a second instance of the single-threaded script engine in a second thread associated with a second execution context, wherein the second instance of the single-threaded script engine accesses the at least one shared script object through a second reference counted script base value object, wherein the script engine does not switch between the execution contexts.

8. The non-transitory computer-readable storage device of claim 7 , further comprising computer-executable instructions such that the at least one shared script object is a reference counted script base object having at least one property and at least one thread-safe method for accessing the at least one property.

9. The non-transitory computer-readable storage device of claim 7 , further comprising computer-executable instructions such that the at least one shared script object is a reference counted script base object having a first property and a first thread-safe set method for setting a value of the first property, and said computer-executable instructions further cause the computing device to set the value of the first property by executing the first thread-safe set method using at least one of the first instance of the single-threaded script engine and the second instance of the single-threaded script engine.

10. The non-transitory computer-readable storage device of claim 7 , further comprising computer-executable instructions such that the at least one shared script object is a reference counted script base object having a first property and a first thread-safe get method for getting a value of the first property, and said computer-executable instructions further cause the computing device to get the value of the first property by executing the first get method using at least one of the first instance of the single-threaded script engine within the first execution context and the second instance of the single-threaded script engine within the second execution context.

11. The non-transitory computer-readable storage device of claim 7 , wherein the computing device is coupled to a memory device and wherein said computer-executable instructions further cause the computing device to determine a number of outside references to the at least one shared script object and release the at least one shared script object from the memory device if the number of outside references to the at least one shared script object is zero.

12. The non-transitory computer-readable storage device of claim 7 , further comprising computer-executable instructions such that properties of the at least one shared script object reference a plurality of shared script objects and wherein said computer-readable instructions further cause the computing device to detect a reference loop among the plurality of shared script objects.

13. The non-transitory computer-readable storage device of claim 7 , wherein the computing device is coupled to at least one component of at least one machine and wherein said computer-executable instructions further cause the computing device to control the at least one component with the first instance of the script engine and the second instance of the script engine using the at least one shared script object.

14. A computing device having executable instructions stored in a memory configured to:

execute a first instance of a single-threaded script engine in a first thread associated with a first execution context, wherein the first instance of the single-threaded script engine accesses at least one shared script object through a first reference counted script base value object; and

concurrently execute a second instance of the single-threaded script engine in a second thread associated with a second execution context, wherein the second instance of the single-threaded script engine accesses the at least one shared script object through a second reference counted script base value object, wherein the script engine does not switch between the execution contexts.

15. The computing device of claim 14 , wherein the at least one shared script object includes a reference counted script base object having at least one property and at least one thread-safe method for accessing the at least one property.

16. The computing device of claim 14 , wherein the at least one shared script object is a reference counted script base object having a first property and a first thread-safe set method for setting a value of the first property, wherein said computing device is configured to set the value of the first property by executing the first thread-safe set method using at least one of the first instance of the single-threaded script engine and the second instance of the single-threaded script engine.

17. The computing device of claim 14 , wherein the at least one shared script object is a reference counted script base object having a first property and a first thread-safe get method for getting a value of the first property, wherein said computing device is configured to get the value of the first property by executing the first get method using at least one of the first instance of the single-threaded script engine within the first execution context and the second instance of the single-threaded script engine within the second execution context.

18. The computing device of claim 14 , wherein said computing device is coupled to a memory device and wherein the computing device is further configured to determine a number of outside references to the at least one shared script object and release the at least one shared script object from the memory device if the number of outside references to the at least one shared script object is zero.

19. The computing device of claim 14 , wherein properties of the at least one shared script object reference a plurality of shared script objects and wherein said computing device is configured to detect a reference loop among the plurality of shared script objects.

20. The computing device of claim 14 , wherein said computing device is coupled to at least one component of at least one machine and wherein said computing device is configured to control the at least one component with the first instance of the script engine and the second instance of the script engine using the at least one shared script object.