NAME¶
MPI_File_read_at_all_end - Reads a file at explicitly specified offsets;
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¶
INCLUDE 'mpif.h'
MPI_FILE_READ_AT_ALL_END( FH, BUF, STATUS, IERROR)
<TYPE> BUF(*)
INTEGER FH, STATUS(MPI_STATUS_SIZE), 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)
- 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 Section
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++ functions 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.