TI Real Time Threads Interface 

LT TR-95-07 

AU David Finkelstein, Norman C. Hutchinson 

AU Dwight J. Makaroff, Roland Mechler and Gerald W. Neufeld 

MN March 

YR 1995 

PA 22 

OR UBC 

AB The Real Time Threads package (abbreviated RT Threads)
provides a user-level, preemptive kernel running inside a single
address space (e.g., within a UNIX process). RT Threads
implements thread management, synchronization, and communication
functions, including communication between RT Threads
environments (i.e., with different address spaces, possibly on
different machines and different architectures). Threads are
scheduled using a real-time, multi-priority, preemptive
scheduling algorithm. Each thread is scheduled on the basis of
its modifiable scheduling attributes: starting time, priority and
deadline. No thread is scheduled before its starting time.
Schedulable threads (i.e., threads whose starting time has
passed) are scheduled on a highest priority first basis.
Schedulable threads of equal priority use an earliest deadline
first (EDF) scheduling policy. An RT Threads environment is
cooperative in the sense that memory is shared among all threads,
and each thread runs to completion unless preempted othe basis of
priorities and deadlines. Alternate scheduling policies, such as
time slicing, can be implemented at the application level using
the scheduling mechanisms provided by RT Threads. This report
describes the interface to the RT Threads package. 

AV ftp ftp.cs.ubc.ca:ftplocaltechreports1995TR-95-07.ps