All system calls in ITS behaved as if they were atomic, using a mechanism called PCLSRing: http://fare.tunes.org/tmp/emergent/pclsr.htm http://fare.tunes.org/tm

All system calls in ITS behaved as if they were atomic, using a mechanism called PCLSRing: http://fare.tunes.org/tmp/emergent/pclsr.htm http://fare.tunes.org/tmp/emergent/pclsr.htm Other systems which took a similar approach were WAITS, the Fluke Kernel, and EROS and its successors.