adding _c to write_at functions

dealii · May 26, 2022 · a3d729f · a3d729f
1 parent 85f986e
commit a3d729f
Showing 1 changed file with 9 additions and 10 deletions.
diff --git a/source/base/data_out_base.cc b/source/base/data_out_base.cc
@@ -7719,14 +7719,13 @@ DataOutInterface<dim, spacedim>::write_vtu_in_parallel(
       DataOutBase::write_vtu_header(ss, vtk_flags);
       header_size = ss.str().size();
       // Write the header on rank 0 at the starting of a file, i.e., offset 0.
-      ierr = MPI_File_write_at(
+      ierr = Utilities::MPI::LargeCount::MPI_File_write_at_c(
         fh, 0, ss.str().c_str(), header_size, MPI_CHAR, MPI_STATUS_IGNORE);
       AssertThrowMPI(ierr);
-
-      header_size = Utilities::MPI::broadcast(comm, header_size, 0);
     }
 
-
+  ierr = MPI_Bcast(&header_size, 1, MPI_UNSIGNED, 0, comm);
+  AssertThrowMPI(ierr);
 
   {
     const auto &patches = get_patches();
@@ -7792,12 +7791,12 @@ DataOutInterface<dim, spacedim>::write_vtu_in_parallel(
       AssertThrowMPI(ierr);
 
       // Writing Footer.
-      ierr = MPI_File_write_at(fh,
-                               footer_offset,
-                               ss.str().c_str(),
-                               footer_size,
-                               MPI_CHAR,
-                               MPI_STATUS_IGNORE);
+      ierr = Utilities::MPI::LargeCount::MPI_File_write_at_c(fh,
+                                                             footer_offset,
+                                                             ss.str().c_str(),
+                                                             footer_size,
+                                                             MPI_CHAR,
+                                                             MPI_STATUS_IGNORE);
       AssertThrowMPI(ierr);
     }
   ierr = MPI_File_close(&fh);