MPIFileireadshared(3OpenMPI) MPIFileireadshared(3OpenMPI)

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


SSYYNNTTAAXX
       C Syntax
           #include 
           int MPIFileireadshared(MPIFile fh, void *buf, int count,
                  MPIDatatype datatype, MPIRequest *request)

       Fortran Syntax
           INCLUDE 'mpif.h'
           MPIFILEIREADSHARED(FH, BUF, COUNT, DATATYPE, REQUEST, IERROR)
                          BUF(*)
                 INTEGER        FH, COUNT, DATATYPE, REQUEST, IERROR


CC++++ SSyynnttaaxx
       #include 
       MPI::Request MPI::File::Ireadshared(void* buf, int count,
            const MPI::Datatype& datatype)


IINNPPUUTT//OOUUTTPPUUTT PPAARRAAMMEETTEERR
       fh        File handle (handle).


IINNPPUUTT PPAARRAAMMEETTEERRSS
       count     Number of elements in buffer (integer).

       datatype  Data type of each buffer element (handle).


OOUUTTPPUUTT PPAARRAAMMEETTEERRSS
       buf       Initial address of buffer (choice).

       request   Request object (handle).

       IERROR    Fortran only: Error status (integer).


DESCRIPTION
       MPIFileireadshared    is    a    nonblocking    version    of    the
       MPIFilereadshared interface. It uses the shared file pointer to read
       files. The order of serialization among the processors is not determin-
       istic  for this noncollective routine, so you need to use other methods
       of synchronization to impose a particular order among processors.


EERRRROORRSS
       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::ERRORSTHROWEXCEPTIONS, 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  MPIERRORSRETURN.  The  error  handler   may   be   changed   with
       MPIFileseterrhandler;      the      predefined     error     handler
       MPIERRORSAREFATAL 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 MPIFileireadshared(3OpenMPI)