NAME¶

MPI_Initialized - Indicates whether MPI_Init has been called.

SYNTAX¶

C Syntax¶

#include <mpi.h>
int MPI_Initialized(int * flag)

Fortran Syntax¶

INCLUDE 'mpif.h'
MPI_INITIALIZED( FLAG, IERROR)
	LOGICAL	 FLAG 
	INTEGER	 IERROR 

C++ Syntax¶

#include <mpi.h>
bool Is_initialized()

OUTPUT PARAMETERS¶

flag

Flag is true if MPI_Init has been called and false otherwise.

IERROR

Fortran only: Error status (integer).

 

DESCRIPTION¶

This routine may be used to determine whether MPI_Init has been called. It is the only routine that may be called before MPI_Init is called.

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. By default, this error handler aborts the MPI job, except for I/O function errors. The error handler may be changed with MPI_Comm_set_errhandler; the predefined error handler MPI_ERRORS_RETURN may be used to cause error values to be returned. Note that MPI does not guarantee that an MPI program can continue past an error.

SEE ALSO¶

MPI_Init