Prex is an open source, royalty-free, real-time operating system for embedded systems. It is designed and implemented for resource-constrained systems that require predictable timing behavior. The highly portable code of Prex is written in 100% ANSI C based on traditional microkernel architecture.
The Prex microkernel provides only fundamental features for task, thread, memory, IPC,
exception, and synchronization. The other basic OS functions - process, file system, application loading, and networking, are provided by the user mode servers. In addition, Prex provides a POSIX emulation layer in order to utilize existing *NIX applications. This design allows the system to perform both of the native real-time task and the generic POSIX process simultaneously without degrading real-time performance. It also helps platform designers to construct OS by choosing suitable system servers for their target requisition.
exception, and synchronization. The other basic OS functions - process, file system, application loading, and networking, are provided by the user mode servers. In addition, Prex provides a POSIX emulation layer in order to utilize existing *NIX applications. This design allows the system to perform both of the native real-time task and the generic POSIX process simultaneously without degrading real-time performance. It also helps platform designers to construct OS by choosing suitable system servers for their target requisition.
The project targets the following goals:
- To provide a small, portable, real-time, secure, and robust operating system.
- To provide simple and clean source codes for education and an experimental test-bed.
- To conform to open standards as much as possible.
- To enjoy our life with kernel hacking. ;-)
http://prex.sourceforge.net/
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