[#ValidationSignals-CallFunctionInValidationInterfaceQueue]
= xref:ValidationSignals.adoc[ValidationSignals]::CallFunctionInValidationInterfaceQueue
:relfileprefix: ../
:mrdocs:

Pushes a function to callback onto the notification queue, guaranteeing any callbacks generated prior to now are finished when the function is called.

== Synopsis

Declared in `<validationinterface.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
CallFunctionInValidationInterfaceQueue(std::function<void()> func);
----

== Description

Be very careful blocking on func to be called if any locks are held ‐ validation interface clients may not be able to make progress as they often wait for things like cs_main, so blocking until func is called with cs_main will result in a deadlock (that DEBUG_LOCKORDER will miss).

== Parameters

[cols="1,4"]
|===
| Name| Description
| *func*
| Function to run once earlier callbacks have completed.
|===


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