MPI_File_read_at_all_end(3) Open MPI MPI_File_read_at_all_end(3)
NAME
MPI_File_read_at_all_end - Reads a file at explicitly specified off-
sets; ending part of a split collective routine (blocking).
SYNTAX
C Syntax
#include <mpi.h>
int MPI_File_read_at_all_end(MPI_File fh, void *buf,
MPI_Status *status)
Fortran Syntax
USE MPI
! or the older form: INCLUDE 'mpif.h'
MPI_FILE_READ_AT_ALL_END(FH, BUF, STATUS, IERROR)
<type> BUF(*)
INTEGER FH, STATUS(MPI_STATUS_SIZE), IERROR
Fortran 2008 Syntax
USE mpi_f08
MPI_File_read_at_all_end(fh, buf, status, ierror)
TYPE(MPI_File), INTENT(IN) :: fh
TYPE(*), DIMENSION(..), ASYNCHRONOUS :: buf
TYPE(MPI_Status) :: status
INTEGER, OPTIONAL, INTENT(OUT) :: ierror
C++ Syntax
#include <mpi.h>
void MPI::File::Read_at_all_end(void* buf, MPI::Status& status)
void MPI::File::Read_at_all_end(void* buf)
INPUT PARAMETER
fh File handle (handle).
OUTPUT PARAMETERS
buf Initial address of buffer (choice).
status Status object (status).
IERROR Fortran only: Error status (integer).
DESCRIPTION
MPI_File_read_at_all_end is a split collective routine that stores the
number of elements actually read from the file associated with fh in
status. MPI_File_read_at_all_end blocks until the operation initiated
by MPI_File_read_at_all_begin completes. The data is taken out of those
parts of the file specified by the current view. All other fields of
status are undefined.
NOTES
All the nonblocking collective routines for data access are "split"
into two routines, each with _begin or _end as a suffix. These split
collective routines are subject to the semantic rules described in Sec-
tion 9.4.5 of the MPI-2 standard.
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_ER-
RORS_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.
4.1.2 Nov 24, 2021 MPI_File_read_at_all_end(3)
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