[#BloombergLP-bslma-BufferAllocator-allocateFromBuffer-0a]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslma.adoc[bslma]::xref:BloombergLP/bslma/BufferAllocator.adoc[BufferAllocator]::allocateFromBuffer
:relfileprefix: ../../../
:mrdocs:

`allocateFromBuffer` overloads

== Synopses

Declared in `<bslma_bufferallocator.h>`

Allocate a memory block of the specified `size` from `buffer`.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
static
void*
xref:BloombergLP/bslma/BufferAllocator/allocateFromBuffer-06.adoc[allocateFromBuffer](
    int* cursor,
    char* buffer,
    xref:BloombergLP/bslma/Allocator/size_type.adoc[size_type] bufSize,
    xref:BloombergLP/bslma/Allocator/size_type.adoc[size_type] size,
    xref:BloombergLP/bslma/BufferAllocator/AlignmentStrategy.adoc[AlignmentStrategy] strategy);
----

[.small]#xref:BloombergLP/bslma/BufferAllocator/allocateFromBuffer-06.adoc[_» more..._]#

Allocate a memory block of the specified `size` from `buffer` with the specified `alignment`.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
static
void*
xref:BloombergLP/bslma/BufferAllocator/allocateFromBuffer-03.adoc[allocateFromBuffer](
    int* cursor,
    char* buffer,
    xref:BloombergLP/bslma/Allocator/size_type.adoc[size_type] bufSize,
    xref:BloombergLP/bslma/Allocator/size_type.adoc[size_type] size,
    int alignment);
----

[.small]#xref:BloombergLP/bslma/BufferAllocator/allocateFromBuffer-03.adoc[_» more..._]#

== Return Value

address of the allocated block, or null if insufficient space

== Parameters

[cols="1,4"]
|===
| Name| Description
| *cursor*
| Index of the next available byte in `buffer` (in/out).
| *buffer*
| Memory buffer from which to allocate.
| *bufSize*
| Size (in bytes) of `buffer`.
| *size*
| Number of bytes to allocate.
| *strategy*
| Alignment strategy used for the allocation.
| *alignment*
| Alignment (in bytes) for the allocated block.
|===


[.small]#Created with https://www.mrdocs.com[MrDocs]#