RENDEZVOUS(2) RENDEZVOUS(2) NAME rendezvous - user level process synchronization SYNOPSIS ulong rendezvous(ulong tag, ulong value) DESCRIPTION The rendezvous system call allows two processes to synchro- nize and exchange a value. In conjunction with the shared memory system calls (see segattach(2) and fork(2)), it enables parallel programs to access the system scheduler. Two processes wishing to synchronize call rendezvous with a common tag, typically an address in memory they share. One process will arrive at the rendezvous first; it suspends execution until a second arrives. When a second process meets the rendezvous the value arguments are exchanged between the processes and returned as the result of the respective rendezvous system calls. Both processes are awakened when the rendezvous succeeds. The tag space is common to processes in the same file name space. If a rendezvous is interrupted the return value is ~0, so that value should not be used in normal communication. SEE ALSO segattach(2), fork(2) DIAGNOSTICS Sets errstr.