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MPI_File_get_atomicity

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 FIFH, IERRORFP 
         LOGICAL FIFLAGFP
 
 

 

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.