MPI_File_iread_shared(3OpenMPI) 										   MPI_File_iread_shared(3OpenMPI)

NAME

       MPI_File_iread_shared - Reads a file using the shared file pointer (nonblocking, noncollective).

SYNTAX

       C Syntax
	   #include <mpi.h>
	   int MPI_File_iread_shared(MPI_File fh, void *buf, int count,
		  MPI_Datatype datatype, MPI_Request *request)

       Fortran Syntax
	   INCLUDE 'mpif.h'
	   MPI_FILE_IREAD_SHARED(FH, BUF, COUNT, DATATYPE, REQUEST, IERROR)
		 <type> 	BUF(*)
		 INTEGER	FH, COUNT, DATATYPE, REQUEST, IERROR

C++ Syntax
       #include <mpi.h>
       MPI::Request MPI::File::Iread_shared(void* buf, int count,
	    const MPI::Datatype& datatype)

INPUT
/OUTPUT PARAMETER
       fh	 File handle (handle).

INPUT PARAMETERS

       count	 Number of elements in buffer (integer).

       datatype  Data type of each buffer element (handle).

OUTPUT PARAMETERS

       buf	 Initial address of buffer (choice).

       request	 Request object (handle).

       IERROR	 Fortran only: Error status (integer).

DESCRIPTION

       MPI_File_iread_shared  is  a  nonblocking version of the MPI_File_read_shared interface. It uses the shared file pointer to read files. The
       order of serialization among the processors is not deterministic for this noncollective routine, so you need to use other methods  of  syn-
       chronization to impose a particular order among processors.

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++ func-
       tions 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.

Open MPI 1.2							  September 2006				   MPI_File_iread_shared(3OpenMPI)