Abstract: A method, system, and computer-readable storage medium are disclosed for efficient writing of pixels to tiled planar pixel arrays. An image editing operation is performed by a first thread on an area of an image comprising a plurality of tiles within the area. A lock for write operation is performed by a second thread on each of the plurality of tiles. Results of the lock for write operations are sent from the second thread to the first thread. An output of the image editing operation is sent from the first thread to one or more third thread. The output of the image editing operation is stored in the plurality of tiles by the one or more third threads.

Abstract: A method, system, and computer-readable storage medium are disclosed for efficient writing of pixels to tiled planar pixel arrays. An image editing operation is performed by a first thread on an area of an image comprising a plurality of tiles within the area. A lock for write operation is performed by a second thread on each of the plurality of tiles. Results of the lock for write operations are sent from the second thread to the first thread. An output of the image editing operation is sent from the first thread to one or more third thread. The output of the image editing operation is stored in the plurality of tiles by the one or more third threads.

Abstract: A system and method for executing applications written in a cooperative scheduling environment in a preemptive task scheduling environment, ensuring that the time sequence for the delivery of interrupts is not altered in the preemptive task scheduling environment, efficiently disabling all cooperative interrupts in response to a request from an application, efficiently scheduling all cooperative interrupts, and efficiently executing emulated instructions while preserving the integrity of the emulated instructions. The system and method utilize a process server to enforce the cooperative scheduling, a cooperative interrupt server and a holds queue to enforce the interrupt requirements, and special context data to ensure the compatibility of applications designed using an old instruction set architecture.

Abstract: A computer has a device driver and an operating system that call a consolidated buffer service routine to coordinate the transfer of data between a main memory and an external device. The consolidated buffer service routine includes a memory preparation service routine and a memory checking service routine. The memory preparation service routine coordinates data transfers between the external device and the memory with the operating system and a data cache, and with other data transfers. The memory preparation service routine ensures that the buffer remains assigned to the memory ranges until the memory checking service routine relinquishes the buffer. Before calling the memory preparation service routine, and I/O preparation table is set which defines the addresses and the type of addresses of the buffer, the size of the data to be transferred, the page size of the buffer, and flags defining data flow and type.

Abstract: A computer has a device driver and an operating system that call a consolidated buffer service routine to coordinate the transfer of data between a main memory and an external device. The consolidated buffer service routine includes a memory preparation service routine and a memory checking service routine. The memory preparation service routine coordinates data transfers between the external device and the memory with the operating system and a data cache, and with other data transfers. The memory preparation service routine ensures that the buffer remains assigned to the memory ranges until the memory checking service routine relinquishes the buffer. Before calling the memory preparation service routine, an I/O preparation table is set which defines the addresses and the type of addresses of the buffer, the size of the data to be transferred, the page size of the buffer, and flags defining data flow and type.

Abstract: An object oriented message passing system for transferring messages between a client task and a server task comprises an object database, an object management unit, a message transaction unit, and a locking unit. The object management unit creates a port object and one or more associated message objects. The message transaction unit matches a send message request issued by a client task with an acceptance function or with a receive message request issued by a server task. In response to a send message request, the message transaction unit creates a send message control block. In response to a receive message request, the message transaction unit creates a delivery message control block if the receive message request matches the send message control block, or creates a receive message control block if the receive message request does not match the send message control block.