[#CuckooCache-bit_packed_atomic_flags-2constructor-05a]
= xref:CuckooCache.adoc[CuckooCache]::xref:CuckooCache/bit_packed_atomic_flags.adoc[bit_packed_atomic_flags]::bit_packed_atomic_flags
:relfileprefix: ../../
:mrdocs:

bit_packed_atomic_flags constructor creates memory to sufficiently keep track of garbage collection information for `size` entries.

== Synopsis

Declared in `<cuckoocache.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
explicit
bit_packed_atomic_flags(uint32_t size);
----

== Parameters

[cols="1,4"]
|===
| Name| Description
| *size*
| the number of elements to allocate space for
|===

== Postconditions

* bit_set, bit_unset, and bit_is_set function properly forall x. x < size
* All calls to bit_is_set (without subsequent bit_unset) will return true.


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