[#BloombergLP-bdlma-BufferManager-truncate]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlma.adoc[bdlma]::xref:BloombergLP/bdlma/BufferManager.adoc[BufferManager]::truncate
:relfileprefix: ../../../
:mrdocs:

Reduce the amount of memory allocated at the specified `address` of the specified `originalSize` (in bytes) to the specified `newSize` (in bytes). Return `newSize` after truncating, or `originalSize` if the memory at `address` cannot be truncated. This method can only `truncate` the memory block returned by the most recent `allocate` or `allocateRaw` request from this object, and otherwise has no effect. The behavior is undefined unless the memory at `address` was originally allocated by this buffer manager, the size of the memory at `address` is `originalSize`, `newSize <= originalSize`, `0 <= newSize`, and `release` was not called after allocating the memory at `address`.

== Synopsis

Declared in `<bdlma_buffermanager.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:BloombergLP/bsls/Types/size_type.adoc[bsls::Types::size_type]
truncate(
    void* address,
    xref:BloombergLP/bsls/Types/size_type.adoc[bsls::Types::size_type] originalSize,
    xref:BloombergLP/bsls/Types/size_type.adoc[bsls::Types::size_type] newSize);
----


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