[#BloombergLP-bdlma-ConcurrentPoolAllocator-2constructor-01]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlma.adoc[bdlma]::xref:BloombergLP/bdlma/ConcurrentPoolAllocator.adoc[ConcurrentPoolAllocator]::ConcurrentPoolAllocator
:relfileprefix: ../../../
:mrdocs:

Create a pool allocator that returns blocks of contiguous memory of the specified `blockSize` (in bytes) for each `allocate` method invocation. Optionally specify a `growthStrategy` used to control the growth of internal memory chunks (from which memory blocks are dispensed). If `growthStrategy` is not specified, geometric growth is used. If `blockSize` and `growthStrategy` are specified, optionally specify a `maxBlocksPerChunk`, indicating the maximum number of blocks to be allocated at once when the underlying pool must be replenished. If `maxBlocksPerChunk` is not specified, an implementation‐defined value is used. If geometric growth is used, the chunk size grows starting at `blockSize`, doubling in size until the size is exactly `blockSize * maxBlocksPerChunk`. If constant growth is used, the chunk size is always `maxBlocksPerChunk`. Optionally specify a `basicAllocator` used to supply memory. If `basicAllocator` is 0, the currently installed default allocator is used. The behavior is undefined unless `1 <= maxBlocksPerChunk`.

== Synopsis

Declared in `<bdlma_concurrentpoolallocator.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
explicit
ConcurrentPoolAllocator(
    xref:BloombergLP/bdlma/ConcurrentPoolAllocator/size_type.adoc[size_type] blockSize,
    xref:BloombergLP/bslma/Allocator.adoc[bslma::Allocator]* basicAllocator = 0);
----


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