MPI_File_read_shared.3.rst

MPI_File_read_shared

:ref:`MPI_File_read_shared` |mdash| Reads a file using the shared file pointer (blocking, noncollective).

SYNTAX

C Syntax

#include <mpi.h>

int MPI_File_read_shared(MPI_File fh, void *buf, int count,
     MPI_Datatype datatype, MPI_Status *status)

Fortran Syntax

USE MPI
! or the older form: INCLUDE 'mpif.h'
MPI_FILE_READ_SHARED(FH, BUF, COUNT, DATATYPE, STATUS,
     IERROR)
     <type>  BUF(*)
     INTEGER FH, COUNT, DATATYPE,STATUS(MPI_STATUS_SIZE), IERROR

Fortran 2008 Syntax

USE mpi_f08
MPI_File_read_shared(fh, buf, count, datatype, status, ierror)
     TYPE(MPI_File), INTENT(IN) :: fh
     TYPE(*), DIMENSION(..) :: buf
     INTEGER, INTENT(IN) :: count
     TYPE(MPI_Datatype), INTENT(IN) :: datatype
     TYPE(MPI_Status) :: status
     INTEGER, OPTIONAL, INTENT(OUT) :: ierror

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).
• status: Status object (status).
• ierror: Fortran only: Error status (integer).

DESCRIPTION

:ref:`MPI_File_read_shared` is a blocking routine that uses the shared file pointer to read files. The order of serialization is not deterministic for this noncollective routine.

ERRORS