# PetscSegBufferGetSize
get currently used size of segmented buffer 
## Synopsis
```
PetscErrorCode PetscSegBufferGetSize(PetscSegBuffer seg, size_t *usedsize)
```
Not Collective


## Input Parameter

- ***seg -*** segmented buffer object



## Output Parameter

- ***usedsize -*** number of used units





## See Also
 `PetscSegBufferExtractAlloc()`, `PetscSegBufferExtractTo()`, `PetscSegBufferCreate()`, `PetscSegBufferGet()`

## Level
developer

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/sys/utils/segbuffer.c.html#PetscSegBufferGetSize">src/sys/utils/segbuffer.c</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/sys/utils/segbuffer.c)


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