| 摘要 |
A coupling device for communication between operating systems in a cluster has a number of FIFO queues. The operating systems have an application programming interface which uses Linux pipe semantics to read from and write to the queues. The coupling device maintains the data structures and locks needed to represent Linux pipes. This allows the use of standard mount, open, write, read and close function calls to the operating system kernel to be used to access the FIFO queues on the coupling device. A write function call with more data than will fit in a single queue entry is split into several entries. A read function call, for less data than will fit into single queue entry, will return an error code indicating that it has failed and not alter the queue. The operating systems my run on a single computer system or be distributed across several computer systems. |
