PetscBagCreate#
Create a bag of values. A PetscBag is a representation of a C struct that can be saved to and read from files, can have values set from the options database
Synopsis#
#include "petscbag.h"
PetscErrorCode PetscBagCreate(MPI_Comm comm, size_t bagsize, PetscBag *bag)
Collective
Input Parameters#
comm - communicator to share bag
bagsize - size of the C structure holding the values, for example sizeof(mystruct)
Output Parameter#
bag - the bag of values
Notes#
After creating the bag, for each entry in the C struct call the appropriate PetscBagRegisterInt() etc to define the C structs layout
The size of the struct must be small enough to fit in a PetscInt; by default
PetscInt is 4 bytes; this means a bag cannot be larger than 2 gigabytes in length.
The warning about casting to a shorter length can be ignored below unless your struct is too large
See Also#
PetscBag, PetscBagGetName(), PetscBagView(), PetscBagLoad(), PetscBagGetData()
PetscBagRegisterReal(), PetscBagRegisterInt(), PetscBagRegisterBool(), PetscBagRegisterScalar()
PetscBagSetFromOptions(), PetscBagDestroy(), PetscBagRegisterEnum()
Level#
intermediate
Location#
Examples#
src/snes/tutorials/ex62.c
src/snes/tutorials/ex69.c
src/sys/tutorials/ex5.c
src/snes/tutorials/ex36.c
src/snes/tutorials/ex27.c
src/sys/tutorials/ex5f90.F90
src/snes/tutorials/ex71.c
src/dm/tutorials/ex7.c
src/snes/tutorials/ex76.c
src/snes/tutorials/ex17.c
Index of all Sys routines
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Index of all manual pages