[#BloombergLP-bslstl-StopState-requestStop]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslstl.adoc[bslstl]::xref:BloombergLP/bslstl/StopState.adoc[StopState]::requestStop
:relfileprefix: ../../../
:mrdocs:

Request a stop on this state and invoke all registered callbacks.

== Synopsis

Declared in `<bslstl_stopstate.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
bool
requestStop();
----

== Description

If this `StopState` object has already had a stop requested, return `false`. Otherwise, atomically mark this `StopState` object as having had a stop requested, then execute all registered callbacks in an unspecified order, and finally return `true`.

== Return Value

`true` if this call requested the stop, and `false` if a stop was already requested


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