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layout: stdlib-reference
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# GroupMemoryBarrier

## Description

Group memory barrier. Ensures that all memory accesses in the group are visible to all threads in the group.




## Signature 

<pre>
<span class="code_keyword">void</span> <a href="groupmemorybarrier-05b.html">GroupMemoryBarrier</a>();

</pre>

## Availability and Requirements

Defined for the following targets:

#### hlsl
Available in all stages.

#### glsl
Available in all stages.

#### cuda
Available in all stages.

#### metal
Available in all stages.

#### wgsl
Available in all stages.

#### spirv
Available in all stages.