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+PR_NotifyCondVar
+================
+
+Notifies a condition variable of a change in its associated monitored
+data.
+
+
+Syntax
+------
+
+.. code::
+
+   #include <prcvar.h>
+
+   PRStatus PR_NotifyCondVar(PRCondVar *cvar);
+
+
+Parameter
+~~~~~~~~~
+
+:ref:`PR_NotifyCondVar` has one parameter:
+
+``cvar``
+   The condition variable to notify.
+
+
+Returns
+~~~~~~~
+
+The function returns one of the following values:
+
+-  If successful, ``PR_SUCCESS``.
+-  If unsuccessful (for example, if the caller has not locked the lock
+   associated with the condition variable), ``PR_FAILURE``.
+
+
+Description
+-----------
+
+The calling thread must hold the lock that protects the condition, as
+well as the invariants that are tightly bound to the condition.
+
+Notification of a condition variable signals a change of state in some
+monitored data. When the notification occurs, the runtime promotes a
+thread that is waiting on the condition variable to a ready state. If
+more than one thread is waiting, the selection of which thread gets
+promoted cannot be predicted. This implies that all threads waiting on a
+single condition variable must have the same semantics. If no thread is
+waiting on the condition variable, the notify operation is a no-op.