/* -*- 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 */
#if defined(HAVE_PRAGMA_WEAK)
#pragma weak MPI_Unpack = PMPI_Unpack
#elif defined(HAVE_PRAGMA_HP_SEC_DEF)
#pragma _HP_SECONDARY_DEF PMPI_Unpack MPI_Unpack
#elif defined(HAVE_PRAGMA_CRI_DUP)
#pragma _CRI duplicate MPI_Unpack as PMPI_Unpack
#elif defined(HAVE_WEAK_ATTRIBUTE)
int MPI_Unpack(const void *inbuf, int insize, int *position, void *outbuf, int outcount,
MPI_Datatype datatype, MPI_Comm comm) __attribute__ ((weak, alias("PMPI_Unpack")));
#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
#define MPI_Unpack PMPI_Unpack
#undef FUNCNAME
#define FUNCNAME MPIR_Unpack_impl
#undef FCNAME
#define FCNAME MPL_QUOTE(FUNCNAME)
int MPIR_Unpack_impl(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;
int contig;
MPI_Aint dt_true_lb;
MPI_Aint data_sz;
if (insize == 0)
goto fn_exit;
/* Handle contig case quickly */
if (HANDLE_GET_KIND(datatype) == HANDLE_KIND_BUILTIN) {
contig = TRUE;
dt_true_lb = 0;
data_sz = outcount * MPIR_Datatype_get_basic_size(datatype);
} else {
MPIR_Datatype *dt_ptr;
MPIR_Datatype_get_ptr(datatype, dt_ptr);
MPIR_Datatype_is_contig(datatype, &contig);
dt_true_lb = dt_ptr->true_lb;
data_sz = outcount * dt_ptr->size;
}
if (contig) {
MPIR_Memcpy((char *) outbuf + dt_true_lb, (char *) inbuf + *position, data_sz);
*position = (int) ((MPI_Aint) * position + data_sz);
goto fn_exit;
}
/* non-contig case */
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);
MPIR_Assert(mpi_errno == MPI_SUCCESS);
/* NOTE: the use of buffer values and positions in MPI_Unpack and in
* MPIR_Segment_unpack are quite different. See code or docs or something.
*/
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) +
(MPI_Aint) * position);
MPIR_Segment_unpack(segp, first, &last, (void *) ((char *) inbuf + *position));
/* Ensure that calculation fits into an int datatype. */
MPIR_Ensure_Aint_fits_in_int((MPI_Aint) * position + last);
*position = (int) ((MPI_Aint) * position + last);
MPIR_Segment_free(segp);
fn_exit:
return mpi_errno;
fn_fail:
goto fn_exit;
}
#endif
#undef FUNCNAME
#define FUNCNAME MPI_Unpack
#undef FCNAME
#define FCNAME MPL_QUOTE(FUNCNAME)
/*@
MPI_Unpack - Unpack a buffer according to a datatype into contiguous memory
Input Parameters:
+ inbuf - input buffer start (choice)
. insize - size of input buffer, in bytes (integer)
. outcount - number of items to be unpacked (integer)
. datatype - datatype of each output data item (handle)
- comm - communicator for packed message (handle)
Output Parameters:
. outbuf - output buffer start (choice)
Inout/Output Parameters:
. position - current position in bytes (integer)
.N ThreadSafe
.N Fortran
.N Errors
.N MPI_SUCCESS
.N MPI_ERR_COMM
.N MPI_ERR_COUNT
.N MPI_ERR_TYPE
.N MPI_ERR_ARG
.seealso: MPI_Pack, MPI_Pack_size
@*/
int MPI_Unpack(const void *inbuf, int insize, int *position,
void *outbuf, int outcount, MPI_Datatype datatype, MPI_Comm comm)
{
int mpi_errno = MPI_SUCCESS;
MPI_Aint position_x;
MPIR_Comm *comm_ptr = NULL;
MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPI_UNPACK);
MPIR_ERRTEST_INITIALIZED_ORDIE();
MPIR_FUNC_TERSE_ENTER(MPID_STATE_MPI_UNPACK);
/* Validate parameters, especially handles needing to be converted */
#ifdef HAVE_ERROR_CHECKING
{
MPID_BEGIN_ERROR_CHECKS;
{
MPIR_ERRTEST_COMM(comm, mpi_errno);
}
MPID_END_ERROR_CHECKS;
}
#endif
/* Convert MPI object handles to object pointers */
MPIR_Comm_get_ptr(comm, comm_ptr);
/* Validate parameters and objects (post conversion) */
#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);
/* Validate comm_ptr */
MPIR_Comm_valid_ptr(comm_ptr, mpi_errno, FALSE);
if (mpi_errno != MPI_SUCCESS)
goto fn_fail;
/* If comm_ptr is not valid, it will be reset to null */
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 (mpi_errno != MPI_SUCCESS)
goto fn_fail;
}
MPID_END_ERROR_CHECKS;
}
#endif /* HAVE_ERROR_CHECKING */
/* ... body of routine ... */
position_x = *position;
mpi_errno = MPIR_Unpack_impl(inbuf, insize, &position_x, outbuf, outcount, datatype);
if (mpi_errno)
goto fn_fail;
MPIR_Assign_trunc(*position, position_x, int);
/* ... end of body of routine ... */
fn_exit:
MPIR_FUNC_TERSE_EXIT(MPID_STATE_MPI_UNPACK);
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", "**mpi_unpack %p %d %p %p %d %D %C", inbuf, insize,
position, outbuf, outcount, datatype, comm);
}
#endif
mpi_errno = MPIR_Err_return_comm(comm_ptr, FCNAME, mpi_errno);
goto fn_exit;
/* --END ERROR HANDLING-- */
}