How do I port code to ThreadX and SSP from other RTOS-based designs?
Here is a webinar that covers one possible approach to porting from various RTOS and POSIX threading APIs. This is helpful if you have written code under Nucleus, POSIX, VxWorks embOS, uC/OSII or other RTOS implementations.http://info.mapusoft.com/Webinar3-29-11Webdnldpg.html
Note that this approach uses a 3rd party tool. Evaluate this approach as you would any other 3rd party based implementation. Visit the Renesas Synergy Gallery for a list of Synergy approved 3rd party tools.
Also Note that Thread-X does have a POSIX layer that can be used to help with those ports. http://rtos.com/products/threadx/Compatibility_for_POSIX