petsc-dev 2014-07-22
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PetscSFFetchAndOpEnd

end operation started in matching call to PetscSFFetchAndOpBegin() to fetch values from roots and update atomically by applying operation using my leaf value

Synopsis

#include "petscsf.h" 
PetscErrorCode PetscSFFetchAndOpEnd(PetscSF sf,MPI_Datatype unit,void *rootdata,const void *leafdata,void *leafupdate,MPI_Op op)
Collective

Input Arguments

sf - star forest
unit - data type
leafdata - leaf values to use in reduction
op - operation to use for reduction

Output Arguments

rootdata - root values to be updated, input state is seen by first process to perform an update
leafupdate - state at each leaf's respective root immediately prior to my atomic update

See Also

PetscSFComputeDegreeEnd(), PetscSFReduceEnd(), PetscSFSetGraph()

Level:advanced
Location:
src/vec/is/sf/interface/sf.c
Index of all PetscSF routines
Table of Contents for all manual pages
Index of all manual pages

Examples

src/vec/is/sf/examples/tutorials/ex1.c.html