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MPI_File_get_atomicity - Returns current consistency semantics for
data-access operations.
C Syntax
#include <mpi.h>
int MPI_File_get_atomicity(MPI_File fh, int *flag)
INCLUDE ’mpif.h’
MPI_FILE_GET_ATOMICITY(FH, FLAG, IERROR)
INTEGER FIFH, IERRORFP
LOGICAL FIFLAGFP
#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.
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