/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
/*
*
* (C) 2001 by Argonne National Laboratory.
* See COPYRIGHT in top-level directory.
*/
#include "mpiimpl.h"
/* -- Begin Profiling Symbol Block for routine MPI_Unpack_external */
#if defined(HAVE_PRAGMA_WEAK)
#pragma weak MPI_Unpack_external = PMPI_Unpack_external
#elif defined(HAVE_PRAGMA_HP_SEC_DEF)
#pragma _HP_SECONDARY_DEF PMPI_Unpack_external MPI_Unpack_external
#elif defined(HAVE_PRAGMA_CRI_DUP)
#pragma _CRI duplicate MPI_Unpack_external as PMPI_Unpack_external
#elif defined(HAVE_WEAK_ATTRIBUTE)
int MPI_Unpack_external(const char datarep[], const void *inbuf, MPI_Aint insize,
MPI_Aint * position, void *outbuf, int outcount, MPI_Datatype datatype)
__attribute__ ((weak, alias("PMPI_Unpack_external")));
#endif
/* -- End Profiling Symbol Block */
/* Define MPICH_MPI_FROM_PMPI if weak symbols are not supported to build
the MPI routines */
#ifndef MPICH_MPI_FROM_PMPI
#undef MPI_Unpack_external
#define MPI_Unpack_external PMPI_Unpack_external
#endif
#undef FUNCNAME
#define FUNCNAME MPI_Unpack_external
#undef FCNAME
#define FCNAME MPL_QUOTE(FUNCNAME)
/*@
MPI_Unpack_external - Unpack a buffer (packed with MPI_Pack_external)
according to a datatype into contiguous memory
Input Parameters:
+ datarep - data representation (string)
. inbuf - input buffer start (choice)
. insize - input buffer size, in bytes (address integer)
. outcount - number of output data items (integer)
. datatype - datatype of output data item (handle)
Input/Output Parameters:
. position - current position in buffer, in bytes (address integer)
Output Parameters:
. outbuf - output buffer start (choice)
.N ThreadSafe
.N Fortran
.N Errors
.N MPI_SUCCESS
.N MPI_ERR_TYPE
.N MPI_ERR_ARG
@*/
int MPI_Unpack_external(const char datarep[],
const void *inbuf,
MPI_Aint insize,
MPI_Aint * position, void *outbuf, int outcount, MPI_Datatype datatype)
{
int mpi_errno = MPI_SUCCESS;
MPI_Aint first, last;
MPIR_Segment *segp;
MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPI_UNPACK_EXTERNAL);
MPIR_ERRTEST_INITIALIZED_ORDIE();
MPIR_FUNC_TERSE_ENTER(MPID_STATE_MPI_UNPACK_EXTERNAL);
/* Validate parameters, especially handles needing to be converted */
#ifdef HAVE_ERROR_CHECKING
{
MPID_BEGIN_ERROR_CHECKS;
{
if (insize > 0) {
MPIR_ERRTEST_ARGNULL(inbuf, "input buffer", mpi_errno);
}
/* NOTE: outbuf could be MPI_BOTTOM; don't test for NULL */
MPIR_ERRTEST_COUNT(insize, mpi_errno);
MPIR_ERRTEST_COUNT(outcount, mpi_errno);
MPIR_ERRTEST_DATATYPE(datatype, "datatype", mpi_errno);
if (datatype != MPI_DATATYPE_NULL && HANDLE_GET_KIND(datatype) != HANDLE_KIND_BUILTIN) {
MPIR_Datatype *datatype_ptr = NULL;
MPIR_Datatype_get_ptr(datatype, datatype_ptr);
MPIR_Datatype_valid_ptr(datatype_ptr, mpi_errno);
MPIR_Datatype_committed_ptr(datatype_ptr, mpi_errno);
}
/* If datatye_ptr is not valid, it will be reset to null */
if (mpi_errno)
goto fn_fail;
}
MPID_END_ERROR_CHECKS;
}
#endif /* HAVE_ERROR_CHECKING */
/* ... body of routine ... */
if (insize == 0) {
goto fn_exit;
}
segp = MPIR_Segment_alloc();
MPIR_ERR_CHKANDJUMP1((segp == NULL), mpi_errno, MPI_ERR_OTHER, "**nomem", "**nomem %s",
"MPIR_Segment_alloc");
mpi_errno = MPIR_Segment_init(outbuf, outcount, datatype, segp);
if (mpi_errno != MPI_SUCCESS)
goto fn_fail;
/* NOTE: buffer values and positions in MPI_Unpack_external are used very
* differently from use in MPIR_Segment_unpack_external...
*/
first = 0;
last = SEGMENT_IGNORE_LAST;
/* Ensure that pointer increment fits in a pointer */
MPIR_Ensure_Aint_fits_in_pointer((MPIR_VOID_PTR_CAST_TO_MPI_AINT inbuf) + *position);
MPIR_Segment_unpack_external32(segp, first, &last, (void *) ((char *) inbuf + *position));
*position += last;
MPIR_Segment_free(segp);
/* ... end of body of routine ... */
fn_exit:
MPIR_FUNC_TERSE_EXIT(MPID_STATE_MPI_UNPACK_EXTERNAL);
return mpi_errno;
fn_fail:
/* --BEGIN ERROR HANDLING-- */
#ifdef HAVE_ERROR_CHECKING
{
mpi_errno =
MPIR_Err_create_code(mpi_errno, MPIR_ERR_RECOVERABLE, FCNAME, __LINE__, MPI_ERR_OTHER,
"**mpi_unpack_external",
"**mpi_unpack_external %s %p %d %p %p %d %D", datarep, inbuf,
insize, position, outbuf, outcount, datatype);
}
#endif
mpi_errno = MPIR_Err_return_comm(NULL, FCNAME, mpi_errno);
goto fn_exit;
/* --END ERROR HANDLING-- */
}