[#absl-BlockingCounter-DecrementCount]
= xref:absl.adoc[absl]::xref:absl/BlockingCounter.adoc[BlockingCounter]::DecrementCount
:relfileprefix: ../../
:mrdocs:

Decrements the counter by one.

== Synopsis

Declared in `<absl/synchronization/blocking_counter.h>`

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

== Description

Decrements the counter's "count" by one, and returns "count == 0". This function requires that "count != 0" when it is called.

Memory ordering: For any threads X and Y, any action taken by X before it calls `DecrementCount()` is visible to thread Y after Y's call to `DecrementCount()`, provided Y's call returns `true`.

== Return Value

`true` if the counter reached zero as a result of this call.


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