Microsoft Technology Licensing, LLC

Scott D Mosier

Patrick Henri Dussud

Michael M Magruder

Frank V Peschel-Gallee

Peter F Sollich

David Charles Wrighton

Madhusudhan Talluri

Rudi Martin

Andrew J Pardoe

Simon Jeremy Hall

Yi Zhang

Raja Krishnaswamy

David N Cutler

Jan Kotas

James J Radigan

Fadi M Hanna

Matthew Gordon

Ian H Carmichael

Ladislav Prosek

Lawrence B Sullivan

Xiaoying Guo

Raja Kirshnaswamy

A method of providing interaction with a game instance of a game application by a remote user includes, at a distribution node, receiving video information from a game server, encoding the video information into encoded video information, distributing the encoded video information to a client device, receiving a user input from the client device, and transmitting the user input to the game server.

Systems and methods for streaming interactive applications

A method of encoding video streams includes, at an encoding device, receiving a first video stream frame from a first server device at the encoding device at a first receipt time; receiving a second video stream frame from a second server device at the encoding device at a second receipt time; encoding the first video stream frame with the encoding device; determining a delay duration based at least partially on a first encoding duration of the first video stream frame and the second receipt time; and transmitting a delay instruction based at least partially on the delay duration to the second server device.

Systems and methods for encoding an interactive software video stream

An instance of universally shared generic code is generated. A runtime parameter enables the size of a stack frame on which local data can be stored to be determined. Dynamically sized locals can be stored on a stack enabling precise garbage collection reporting. One frame of the stack is allocated for each code segment to simplify GC reporting. A reporting region in the frame memory region comprises a count of locals and a location at which the local is found in the stack.

Dynamically sized locals with precise garbage collection reporting

Multiple different type hierarchies can communicate in a high performance and seamless manner by sharing a GC and interface dispatch logic. A runtime environment can support multiple independent type hierarchies, each type hierarchy defined by the module which defines the root of a type graph and some other helper functionality. Code that uses the dispatch logic has to follow certain rules in order to maintain GC and type safety. Different types in disjoint type graphs can behave as if they were one type for cross type graph communication purposes.

Seamless high performance interoperability between different type graphs that share a garbage collector

Loop control flow diversion supports thread synchronization, garbage collection, and other situations involving suspension of long-running loops. Divertible loops have a loop body, a loop top, an indirection cell containing a loop top address, and a loop jump instruction sequence which references the indirection cell. In normal execution, control flows through the indirection cell to the loop top. After the indirection cell is altered, however, execution flow is diverted to a point away from the loop top. Operations such as garbage collection are performed while the loop (and hence the thread(s) using the loop) is thus diverted. The kernel or another thread then restores the loop top address into the indirection cell, and execution flow again continues through the restored indirection cell to the loop top.

Loop control flow diversion

A programming environment may have an abstract interface definition that may contain a redirection definition that may cause a call to be bound to a redirected method or function. The redirected method or function may be a conditional redirection, and some embodiments may perform various checks including signature checks, static and runtime access checks, and other verifications for the redirected method. The redirection may enable a programmer to modify a portion of an interface without having to re-implement all of the functions of the interface.

Attribute based method redirection

The efficient use of type descriptors with frozen objects. A frozen object might actually include several type descriptors, a primary type descriptor that is canonical according to a set of canonicalization rules, and an auxiliary type descriptor that is not identical to the primary type descriptor. The auxiliary type descriptor may be used to access the canonical type descriptor. When performing an operation, if the auxiliary type descriptor can be used to perform the operation, then that auxiliary type descriptor may be used. If the canonical type descriptor is to be used to perform the operation, the auxiliary type descriptor is used to gain access to the canonical primary type descriptor. The primary type descriptor is then used to perform the operation.

Type descriptor management for frozen objects

Mechanisms that allow frameworks significant flexibility in varying the library of common base classes in a manner that better suits the domain of applications served by the framework. Instead of providing the base class library, the runtime provides a data contract for the data structure of each base class. The frameworks can then define each base class in a custom way so long as the data contract is honored. Thus, for example, the framework may provide custom framework-specific methods and/or properties as is appropriate for the framework. Another framework might define the base classes in a different way.

Flexible base class library

In an exemplary media implementation, one or more electronically-accessible media include electronically-executable instructions that utilize an application programming interface, the application programming interface facilitating creation of callback-type dynamic function tables; each callback-type dynamic function table including a begin address, an end address, and a callback function, each callback-type dynamic function table corresponding to a code heap that stores code for multiple functions in a runtime environment; wherein interaction between the runtime environment and an operating system is precipitated upon calling the callback function to acquire exception handling and/or unwind information. In another exemplary media implementation, one or more electronically-accessible media include at least part of an operating system that is configured to request from a runtime environment exception handling and/or unwinding information for functions that are managed by the runtime environment.

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Redmond, WA, United States of America

Scott D Mosier