NAME

       MPI_File_get_atomicity - Returns current consistency semantics for data-access operations.

SYNTAX

C Syntax

       #include <mpi.h>
       int MPI_File_get_atomicity(MPI_File fh, int *flag)

Fortran Syntax

       USE MPI
       ! or the older form: INCLUDE 'mpif.h'
       MPI_FILE_GET_ATOMICITY(FH, FLAG, IERROR)
            INTEGER   FH, IERROR
            LOGICAL   FLAG

Fortran 2008 Syntax

       USE mpi_f08
       MPI_File_get_atomicity(fh, flag, ierror)
            TYPE(MPI_File), INTENT(IN) :: fh
            LOGICAL, INTENT(OUT) :: flag
            INTEGER, OPTIONAL, INTENT(OUT) :: ierror

C++ Syntax

       #include <mpi.h>
       bool MPI::File::Get_atomicity() const

INPUT PARAMETER

       fh        File handle (handle).

OUTPUT PARAMETER

       flag      true if atomic mode is enabled, false if nonatomic mode is enabled (boolean).

       IERROR    Fortran only: Error status (integer).

DESCRIPTION

       MPI_File_get_atomicity   returns   the  current  consistency  semantics  for  data  access
       operations on the set of file handles created by one collective MPI_File_open. If flag  is
       true,  atomic  mode  is  currently  enabled; if flag is false, nonatomic mode is currently
       enabled.

ERRORS

       Almost all MPI routines return an error value; C routines as the value of the function and
       Fortran  routines in the last argument. C++ functions do not return errors. If the default
       error handler is set to MPI::ERRORS_THROW_EXCEPTIONS, then  on  error  the  C++  exception
       mechanism will be used to throw an MPI::Exception object.

       Before  the  error value is returned, the current MPI error handler is called. For MPI I/O
       function errors, the default error handler is set to MPI_ERRORS_RETURN. The error  handler
       may    be   changed   with   MPI_File_set_errhandler;   the   predefined   error   handler
       MPI_ERRORS_ARE_FATAL may be used to  make  I/O  errors  fatal.  Note  that  MPI  does  not
       guarantee that an MPI program can continue past an error.