[#BloombergLP-bslmt-ThreadGroup]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslmt.adoc[bslmt]::ThreadGroup
:relfileprefix: ../../
:mrdocs:

This class provides a simple mechanism for managing a group of joinable threads. The destructor ensures that any running threads are detached so that resources are not leaked. This class is thread‐enabled, thread‐safe, and exception‐neutral.

== Synopsis

Declared in `<bslmt_threadgroup.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
class ThreadGroup;
----

== Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bslmt/ThreadGroup/2constructor.adoc[`ThreadGroup`]         [.small]#[constructor]#
| Create an empty thread group. Optionally specify `basicAllocator` will be used to supply memory. If `basicAllocator` is 0, the currently installed default allocator will be used.
| xref:BloombergLP/bslmt/ThreadGroup/2destructor.adoc[`~ThreadGroup`] [.small]#[destructor]#
| Destroy this object. Any threads not joined will be allowed to run independently, and will no longer be joinable.
| xref:BloombergLP/bslmt/ThreadGroup/addThread-017.adoc[`addThread`] 
| `addThread` overloads
| xref:BloombergLP/bslmt/ThreadGroup/addThreads-03.adoc[`addThreads`] 
| `addThreads` overloads
| xref:BloombergLP/bslmt/ThreadGroup/joinAll.adoc[`joinAll`] 
| Block the calling thread until all threads started in this group have finished executing.
| xref:BloombergLP/bslmt/ThreadGroup/numThreads.adoc[`numThreads`] 
| Return a snapshot of the number of threads started in this group that have not been joined.
|===



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