SRR Module SRR Module provides synchronous message passing, asynchronous event notification (proxies)
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Asynchronous Linux Kernel synchronous synchronous message passing SRR

SRR Module Description

SRR Module provides synchronous message passing, asynchronous event notification (proxies) SRR Module is an open-source project maintained by Cogent, and distributed under the a GNU General Public License (GPL). It provides synchronous message passing, asynchronous event notification (proxies), and user-space interrupt handling for the Linux operating system. Synchronous message passing is a fast, flexible, and robust IPC mechanism, particularly useful for building systems composed of multiple co-operating processes.The implementation of the SRR Module was inspired by the QNX operating system. It allows one process or thread to send a message to another process or thread. The first process waits until the second process replies. This message-passing capability between processes has been used for over a decade as a reliable way to create flexible, modular program architectures.Other functions in addition to the basic send-receive-reply mechanism include proxies (queued asynchronous events), timed delivery of proxies and signals, triggering of proxies between tasks, and user-space interrupt handling. The addition of thread support allows proxies and synchronous messages to be used as inter-thread synchronization and communication facilities. Proxies can also be used to solve several common race conditions associated with signals. The SRR Module includes an API library written in C and a QNX 4 compatibility layer.The SRR Module is very stable and extremely fast, at approximately 80% of QNX 4's performance on the same hardware.What's New in This Release:· This release changes the work handlers to match changes made in version 2.6.20 of the Linux kernel.· Module compilation has been fixed.· Support has been added for messages larger than 3 MBytes.· Workarounds have been added for udev issues.· Potential timer IRQ race conditions have been fixed.· Spinlocks have been replaced with mutexes where swapping is allowed.· Relay functions have been added.· clock_getres() has been implemented.· Unnecessary OOPS messages have been removed.· The Sendmx() return value has been fixed.

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