Usefull Links http://www.qnx.com/developers/docs/qnxcar2/index.jsp?topic=%2Fcom.qnx.doc.neutrino.sys_arch%2Ftopic%2Fkernel_SYNCHRO.html https://stackoverflow.com/questions/4175379/what-is-the-point-of-having-a-key-t-if-what-will-be-the-key-to-access-shared-mem