1 #if !defined(_PETSCSFTYPES_H) 2 #define _PETSCSFTYPES_H 3 4 /*S 5 PetscSF - PETSc object for setting up and managing the communication of certain entries of arrays and Vecs between MPI processes. 6 7 Level: intermediate 8 9 Concepts: star forest 10 11 PetscSF uses the concept of star forests to indicate and determine the communication patterns concisely and efficiently. 12 A star http://en.wikipedia.org/wiki/Star_(graph_theory) forest is simply a collection of trees of height 1. The leave nodes represent 13 "ghost locations" for the root nodes. 14 15 .seealso: PetscSFCreate(), VecScatter, VecScatterCreate() 16 S*/ 17 typedef struct _p_PetscSF* PetscSF; 18 19 /*S 20 PetscSFNode - specifier of owner and index 21 22 Level: beginner 23 24 Concepts: indexing, stride, distribution 25 26 .seealso: PetscSFSetGraph() 27 S*/ 28 typedef struct { 29 PetscInt rank; /* Rank of owner */ 30 PetscInt index; /* Index of node on rank */ 31 } PetscSFNode; 32 33 #endif 34