[#BloombergLP-bslma-MallocFreeAllocator]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslma.adoc[bslma]::MallocFreeAllocator
:relfileprefix: ../../
:mrdocs:

This class provides direct access to the system&hyphen;supplied (native) global `std&colon;&colon;malloc` and `std&colon;&colon;free`&period;

== Synopsis

Declared in `&lt;bslma&lowbar;mallocfreeallocator&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
class MallocFreeAllocator
    : public xref:BloombergLP/bslma/Allocator.adoc[Allocator]
----

== Description

A `static` method is provided for obtaining a unique, process wide object of this class, which is valid from the time the method is called until after the program (not just `main`) exits&period;

== Base Classes

[cols="1,4"]
|===
| Name| Description
| `xref:BloombergLP/bslma/Allocator.adoc[Allocator]`
| Pure abstract protocol for clients and suppliers of raw memory&period;
|===

== Type Aliases

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bslma/Allocator/size_type.adoc[`size&lowbar;type`] 
| Alias for an unsigned integral type capable of representing the number of bytes in this platform&apos;s virtual address space&period;
|===


== Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bslma/MallocFreeAllocator/2constructor.adoc[`MallocFreeAllocator`]         [.small]#[constructor]#
| Create an allocator that uses `std&colon;&colon;malloc` and `std&colon;&colon;free` to supply memory&period; Note that all objects of this class share the same underlying resource&period;
| xref:BloombergLP/bslma/MallocFreeAllocator/2destructor.adoc[`&#126;MallocFreeAllocator`] [.small]#[destructor]# [.small]#[virtual]#
| Destroy this allocator&period;
| xref:BloombergLP/bslma/Allocator/operator_assign.adoc[`operator&equals;`] 
| 
| xref:BloombergLP/bslma/MallocFreeAllocator/allocate-0b.adoc[`allocate`] 
| Return a newly allocated block of memory of the specified `size` bytes&period;
| xref:BloombergLP/bslma/MallocFreeAllocator/deallocate-07.adoc[`deallocate`] 
| Return the memory block at the specified `address` to this allocator&period;
| xref:BloombergLP/bslma/Allocator/deleteObject-09.adoc[`deleteObject`] 
| `deleteObject` overloads
| xref:BloombergLP/bslma/Allocator/deleteObjectRaw-06f.adoc[`deleteObjectRaw`] 
| `deleteObjectRaw` overloads
| xref:BloombergLP/bslma/Allocator/is_equal.adoc[`is&lowbar;equal`] 
| 
|===


== Static Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bslma/MallocFreeAllocator/singleton.adoc[`singleton`] 
| Return a reference to a valid object of this class&period;
| xref:BloombergLP/bslma/Allocator/throwBadAlloc.adoc[`throwBadAlloc`] 
| Throw `std&colon;&colon;bad&lowbar;alloc` or abort the program&period;
|===


== Protected Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bslma/Allocator/do_allocate.adoc[`do&lowbar;allocate`]  [.small]#[virtual]#
| Return a newly allocated block of at least `bytes` with `alignment`&period;
| xref:BloombergLP/bslma/Allocator/do_deallocate.adoc[`do&lowbar;deallocate`]  [.small]#[virtual]#
| Return the memory block at `p` having `bytes` and `alignment`&period;
| xref:BloombergLP/bslma/Allocator/do_is_equal.adoc[`do&lowbar;is&lowbar;equal`]  [.small]#[virtual]#
| Return whether this allocator can exchange memory with `other`&period;
|===



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