Rendezvous (Plan 9)

Rendezvous (Plan 9)

Rendezvous is a synchronization mechanism in Plan 9 from Bell Labs. It is a system call that allows two processes to exchange a single data item while synchronizing.

Rendezvous call takes a "tag" and a "value" as its arguments. The tag is typically an address in memory shared by both processes. Calling rendezvous causes a process to sleep until a second rendezvous call with a matching tag occurs. Then, the values are exchanged and both processes are awakened.

More complex synchronization mechanisms can be created from this primitive operation. See also mutual exclusion.

External links

* [http://www.cs.bell-labs.com/sys/doc/sleep.html Process Sleep and Wakeup on a Shared-memory Multiprocessor] by Rob Pike, Dave Presotto, Ken Thompson and Gerard Holzmann.


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