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

Registers a hook for `Mutex` tracing.

== Synopsis

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

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
RegisterMutexTracer(void(* fn)(char const*, void const*, int64_t));
----

== Description

This has the same ordering and single‐use limitations as `RegisterMutexProfiler()`.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *fn*
| Callback invoked with an event name, an opaque mutex handle, and the number of wait cycles.
|===


[.small]#Created with https://www.mrdocs.com[MrDocs]#