[#BloombergLP-bdlcc-ObjectPool-2constructor-09]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlcc.adoc[bdlcc]::xref:BloombergLP/bdlcc/ObjectPool.adoc[ObjectPool]::ObjectPool
:relfileprefix: ../../../
:mrdocs:

Create an object pool that invokes the default constructor of the the parameterized `TYPE` to construct objects. When the pool is depleted, it will increase its capacity according to the optionally specified `growBy` value. If `growBy` is positive, the pool replenishes itself with at least `growBy` new objects. If `growBy` is negative, the amount of increase begins at `‐growBy` and grows geometrically up to an implementation‐defined maximum. When objects are returned to the pool, the default value of RESETTER is invoked with a pointer to the returned object to restore the object to a reusable state. Optionally specify a `basicAllocator` used to supply memory. If `basicAllocator` is 0, the currently installed default allocator is used. The behavior is undefined unless `0 != growBy`.

== Synopsis

Declared in `<bdlcc_objectpool.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
explicit
ObjectPool(
    int growBy = ‐1,
    xref:BloombergLP/bslma/Allocator.adoc[bslma::Allocator]* basicAllocator = 0);
----


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