[#absl-Mutex-AssertReaderHeld]
= xref:absl.adoc[absl]::xref:absl/Mutex.adoc[Mutex]::AssertReaderHeld
:relfileprefix: ../../
:mrdocs:

Requires that the mutex be held at least in shared mode (read mode) by this thread&period;

== Synopsis

Declared in `&lt;absl&sol;synchronization&sol;mutex&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
AssertReaderHeld() const;
----

== Description

Intended only as a debugging aid&semi; it doesn&apos;t guarantee correctness&period;


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