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MPI_File_get_atomicity(3) man page (version 1.8.1)

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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.


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