Manpages - MPI_File_get_atomicity.3

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

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

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

  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

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

fh

File handle (handle).

flag

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

IERROR

Fortran only: Error status (integer).

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.

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.