1 2 #include <petsc/private/petscimpl.h> /*I "petscsys.h" I*/ 3 4 /* Logging support */ 5 PetscLogEvent PETSC_Barrier; 6 7 /*@C 8 PetscBarrier - Blocks until this routine is executed by all 9 processors owning the object obj. 10 11 Input Parameters: 12 . obj - PETSc object (`Mat`, `Vec`, `IS`, `SNES` etc...) 13 The object be caste with a (PetscObject). NULL can be used to indicate the barrier should be across `PETSC_COMM_WORLD` 14 15 Level: intermediate 16 17 Developer Note: 18 This routine calls `MPI_Barrier()` with the communicator of the `PetscObject` 19 20 Fortran Note: 21 You may pass `PETSC_NULL_VEC` or any other PETSc null object, such as `PETSC_NULL_MAT`, to indicate the barrier should be 22 across `PETSC_COMM_WORLD`. You can also pass in any PETSc object, `Vec`, `Mat`, etc 23 24 @*/ 25 PetscErrorCode PetscBarrier(PetscObject obj) { 26 MPI_Comm comm; 27 28 PetscFunctionBegin; 29 if (obj) PetscValidHeader(obj, 1); 30 PetscCall(PetscLogEventBegin(PETSC_Barrier, obj, 0, 0, 0)); 31 if (obj) PetscCall(PetscObjectGetComm(obj, &comm)); 32 else comm = PETSC_COMM_WORLD; 33 PetscCallMPI(MPI_Barrier(comm)); 34 PetscCall(PetscLogEventEnd(PETSC_Barrier, obj, 0, 0, 0)); 35 PetscFunctionReturn(0); 36 } 37