[#BloombergLP-ball-CategoryManager-addCategory-07]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/ball.adoc[ball]::xref:BloombergLP/ball/CategoryManager.adoc[CategoryManager]::addCategory
:relfileprefix: ../../../
:mrdocs:

Add to the registry of this category manager a category having the specified `categoryName`, possibly changed by the registered category name filter callback, and having the specified `recordLevel`, `passLevel`, `triggerLevel`, and `triggerAllLevel` threshold values, respectively, if there is no category having (the possibly filtered) `categoryName` and each of the specified threshold values is in the range `[0 .. 255]`. Return the address of the newly‐created, modifiable category on success, and 0 otherwise. The behavior is undefined unless a lock is not held by this thread on the mutex returned by `rulesetMutex`. Note that if a category having (the possibly filtered) `categoryName` already exists in the registry, 0 is returned. Note that an existing category will not be modified if a category with the (possibly filtered) `categoryName` already exists.

== Synopsis

Declared in `<ball_categorymanager.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:BloombergLP/ball/Category.adoc[Category]*
addCategory(
    char const* categoryName,
    int recordLevel,
    int passLevel,
    int triggerLevel,
    int triggerAllLevel);
----


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