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MPI_File_get_atomicity(3OpenMPI)                                            MPI_File_get_atomicity(3OpenMPI)



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
           INCLUDE 'mpif.h'
           MPI_FILE_GET_ATOMICITY(FH, FLAG, IERROR)
            INTEGER FH, IERROR
            LOGICAL FLAG


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  cur-rently currently
       rently 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.




Open MPI 1.2                                   September 2006               MPI_File_get_atomicity(3OpenMPI)