18.2.104. MPI_File_get_atomicity
MPI_File_get_atomicity - Returns current consistency semantics for data-access operations.
18.2.104.1. SYNTAX
18.2.104.1.1. C Syntax
#include <mpi.h>
int MPI_File_get_atomicity(MPI_File fh, int *flag)
18.2.104.1.2. Fortran Syntax
USE MPI
! or the older form: INCLUDE 'mpif.h'
MPI_FILE_GET_ATOMICITY(FH, FLAG, IERROR)
INTEGER FH, IERROR
LOGICAL FLAG
18.2.104.1.3. 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
18.2.104.2. INPUT PARAMETER
fh
: File handle (handle).
18.2.104.3. OUTPUT PARAMETER
flag
: true if atomic mode is enabled, false if nonatomic mode is enabled (boolean).IERROR
: Fortran only: Error status (integer).
18.2.104.4. 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.
18.2.104.5. ERRORS
Almost all MPI routines return an error value; C routines as the value of the function and Fortran routines in the last argument.
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.