[#BloombergLP-bslma-SequentialAllocator-allocateAndExpand-06]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslma.adoc[bslma]::xref:BloombergLP/bslma/SequentialAllocator.adoc[SequentialAllocator]::allocateAndExpand
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:mrdocs:

Return memory of at least the specified `*size` and at most `maxNumBytes`.

== Synopsis

Declared in `<bslma_sequentialallocator.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void*
allocateAndExpand(
    int* size,
    int maxNumBytes);
----

== Description

Return memory of at least the specified `*size` and at most the specified `maxNumBytes`. Also return the actual amount of memory allocated in `*size`. If `*size` is 0, no memory is allocated and 0 is returned. The behavior is undefined unless `0 <= *size <= maxNumBytes`.

== Return Value

The address of the allocated memory block.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *size*
| The requested size (in/out); updated with the actual size.
| *maxNumBytes*
| The maximum number of bytes to allocate.
|===


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