# TSPreStage
Runs the user-defined pre-stage function set using `TSSetPreStage()` 
## Synopsis
```
#include "petscts.h"  
PetscErrorCode TSPreStage(TS ts, PetscReal stagetime)
```
Collective


## Input Parameters

- ***ts          -*** The `TS` context obtained from `TSCreate()`
stagetime   - The absolute time of the current stage





## Note
`TSPreStage()` is typically used within time stepping implementations,
most users would not generally call this routine themselves.


## See Also
 [](chapter_ts), `TS`, `TSPostStage()`, `TSSetPreStep()`, `TSPreStep()`, `TSPostStep()`

## Level
developer

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/interface/ts.c.html#TSPreStage">src/ts/interface/ts.c</A>


---
[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/ts/interface/ts.c)


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