condition-variable-signal

Purpose
Unblock one thread that is blocked on condition-variable.

Package   :portable-threads

Module   :portable-threads

Arguments and values

Errors
The lock (or recursive lock) associated with condition-variable is not held by the executing process.

Description
If no threads are blocked on condition-variable, this function is a no-op.

See also
    condition-variable-broadcast
    condition-variable-wait
    condition-variable-wait-with-timeout
    make-condition-variable
    with-lock-held
    without-lock-held

Example
Acquire the lock associated with condition-variable and then signal one blocked thread that is waiting on it:

  (with-lock-held (condition-variable)
    (condition-variable-signal condition-variable))

Note
On Common Lisp implementations without threads, this function does nothing.

condition-variable-signal