MPI_File_iread_shared(3) Open MPI MPI_File_iread_shared(3)NAMEMPI_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).
DESCRIPTIONMPI_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 determin‐
istic for this noncollective routine, so you need to use other methods
of synchronization 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.
1.7.4 Feb 04, 2014 MPI_File_iread_shared(3)
