摘要:
A multicasting system for multicasting window events to various application programs running on a computer system, each such program having an application window. A global control program runs on the computer system and has a global control window. Through the global control program, a user selects one or more of the application programs to receive incoming window events. Later, when the global control window is active, any incoming window event is received in that window. The global control program automatically multicasts each such event to every application program that the user has selected to receive incoming window events. Events may be multicast directly to child windows of the various application windows. The global control window may have a global child window that receives incoming window events; such events are multicast directly to selected child windows of the application programs. The application programs may be resident locally or on a remote computer system. If window events are received out of sequence, the global control program may either ignore them or resequence them for proper operation.
摘要:
A floating point arithmetic unit for correctly rounding a quotient or a square root of high precision numbers to the floating point number closest to the exact result is disclosed. The invention is generally applicable to round results to a precision greater than that provided by the floating point hardware. Prior to rounding, the hardware within the floating point unit produces a high precision mantissa with all but the last few digits correct. The rounding technique according to the invention is then used to produce a correctly rounded result using an enhanced Tuckerman test. Unlike a conventional Tuckerman test, the enhanced Tuckerman test determines the last few ULPs for both square root and division while checking for early termination. The advantage of checking for early termination is that the computation time needed to make the rounding decision can be significantly reduced.
摘要:
An encryption key fragment is divided into a number of encryption key fragments. Requests to store different ones of the encryption key fragments are transmitted to different computer memory storage systems. An individual request to store an encryption key fragment includes one of the encryption key fragments and bears an access control hallmark for regulating access to the encryption key fragment.
摘要:
A trusted hardcopy document is generated using a two-part confirmation number including a private part and a public part. A public part of the confirmation number is received at a first party creating the trusted hardcopy document. The private part of the confirmation number is sent to an owner of the trusted hardcopy document by a trusted party and is not sent to the first party creating the trusted hardcopy document. A human-readable form and a machine readable form of the public part of the confirmation number are printed on the trusted hardcopy document.
摘要:
A computer network (400) includes a first switch (435) and a neighboring switch (440), wherein the first switch (435) floods the computer network (400) as a result of a forwarding table miss and the neighboring switch (440) acts as a barrier to prevent the flood from propagating into unrelated areas of the computer network (400). A method of reducing flooding within a computer network (400) includes intentionally flooding the computer network when a new forwarding table entry is made by a first network switch (435), such that information contained within the new forwarding table entry is recorded by a neighboring network switch (440) which subsequently blocks messages which are received on a proper destination port.
摘要:
A computer language for facilitating communication between web services, where web services may use disparate input and output document formats, and system using same. A Conversation Definition Language (CDL) is extended with transformational information to a Transformational Conversation Definition Language (TCDL). The CDL defines document types, transitions and interactions of a conversation between two or more web services. In a preferred embodiment, the transformational information is a subset of the interaction information. Stylesheets are used to define the semantics of the required transformation and the appropriate stylesheets are identified in the TCDL file. A conversation controller component reads the TCDL files that correspond to a given conversation and utilizes the transformation information, when necessary to transform documents between web services without human intervention.
摘要:
In one aspect, a data race condition is detected based on an address of a variable shared by at least first and second threads for executing the program code, the shared variable address being stored in a hardware table. Detection of the data race condition in the program code is reported. In another aspect, at least first and second threads for executing the program code are synchronized based on an address of a variable shared by the threads and stored in a hardware table.
摘要:
Various approaches are described for auditing integrity of stored data. In one approach, a data set is provided from a client to a storage provider, and the data set is stored at a first storage arrangement by the storage provider. An auditor determines whether the data set stored at the first storage arrangement is corrupt without reliance on any part of the data set and any derivative of any part of the data set stored by the client. While the auditor is determining whether the data set stored at the first storage arrangement is corrupt, the auditor is prevented from being exposed to information specified by the data set. The auditor outputs data indicative of data corruption in response to determining that the data set stored at the first storage arrangement is corrupt.
摘要:
A conversation definition language (CDL) is disclosed that programmers may use to define sequences of interactions for communicating with a web service to facilitate use of the web service. CDL enables web services provided by different entities to engage in flexible and autonomous interactions. Using CDL, services can communicate by exchanging messages, and the message exchanges are expected to follow a specific pattern (i.e., a conversation). CDL is used to define the conversation, such that a service may expect a particular message in response to transmitting a particular message. CDL includes document type descriptions, interactions and transitions for describing a conversation. The document type descriptions describe the messages that may be exchanged. The interactions describe the type of actions (e.g., receive and/or transmit a message) that may be performed, and the transitions describe the possible sequences of the interactions.
摘要:
A system and method for typing resources in a distributed system is provided which enables flexible searching mechanisms for finding distributed resources. The distributed system includes at least three types of resources: service, vocabulary and contract resources. The service resource includes the implementation logic for the service. A contract resource contains interface data used for accessing resources. The vocabulary resource contains an attribute schema defining attributes used to describe resources. Each resource—including service, vocabulary and contract resources—is typed by associating one or more vocabulary resources and one or more contract resources with the resource. The vocabulary resources explain the meaning of attribute lists describing the resource and enable the resource to be discovered. The contract resources provide data for accessing the resource. Because vocabulary and contract resources are themselves resources, they are also typed by vocabulary and contract resources and are, accordingly, discoverable and accessible. Typing resources with vocabularies and contracts that are themselves discoverable resources, provides a structural mechanism for supporting robust resource discovery processes suitable for large, loosely-coupled distributed systems.