MPI_File_get_atomicity(3)          Open MPI          MPI_File_get_atomicity(3)



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 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.




1.4.1                            Jan 14, 2010        MPI_File_get_atomicity(3)
