:orphan: # PetscDeviceContextQueryIdle Returns whether or not a `PetscDeviceContext` is idle ## Synopsis ``` #include PetscErrorCode PetscDeviceContextQueryIdle(PetscDeviceContext dctx, PetscBool *idle) ``` Not Collective ## Input Parameter - ***dctx -*** The `PetscDeviceContext` ## Output Parameter - ***idle -*** `PETSC_TRUE` if `dctx` has NO work, `PETSC_FALSE` if it has work ## Note This routine only refers a singular context and does NOT take any of its children into account. That is, if `dctx` is idle but has dependents who do have work this routine still returns `PETSC_TRUE`. ## See Also `PetscDeviceContextCreate()`, `PetscDeviceContextWaitForContext()`, `PetscDeviceContextFork()` ## Level intermediate ## Location src/sys/objects/device/interface/dcontext.cxx --- [Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/sys/objects/device/interface/dcontext.cxx) [Index of all Sys routines](index.md) [Table of Contents for all manual pages](/manualpages/index.md) [Index of all manual pages](/manualpages/singleindex.md)