# PetscSegBufferUnuse
return some unused entries obtained with an overzealous `PetscSegBufferGet()` 
## Synopsis
```
PetscErrorCode PetscSegBufferUnuse(PetscSegBuffer seg, size_t unused)
```
Not Collective


## Input Parameters

- ***seg -*** segmented buffer object
- ***unused -*** number of unused units





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

## Level
developer

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


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


[Index of all Sys routines](index.md)  
[Table of Contents for all manual pages](/docs/manualpages/index.md)  
[Index of all manual pages](/docs/manualpages/singleindex.md)  
