| Concurrency.empty | Part of Concurrency module |
| Syntax | empty (variableReference) : boolean
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| 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.
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| Status | Part of the language and only conceptually part of the Concurrency unit. This means that you can only call the function by calling empty, not by calling Concurrency.empty.
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| See also | condition, wait, signal, fork and monitor.
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