empty

OpenTuring

emptycondition function

Syntax   empty (variableReference) : boolean

Description   The empty function is used in a concurrent program. It returns true if the variableReference, which must be a condition variable, has no processes waiting for it. Processes join the queue of a condition variable by executing the wait statement, and are awakened by the signal statement.

See also   condition, wait, signal, fork and monitor.

See also predefined unit Concurrency.