fix: replace epicsUInt64 with UInt64 and remove #ifdefs
fix in Linux_alm: must initialize sigev_notify_attributes member
fix in Linux_alm: must epicsInterruptLock around call to handler
added long long integer division for vxWorks
added a linux implementation, using posix timers
TAG R6-2
fix: variable name is ticks, not t
fix: include sysLib.h in vxWorks_alm_ppc_mv5500.c