/* -*- 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_Sendrecv */
#if defined(HAVE_PRAGMA_WEAK)
#pragma weak MPI_Sendrecv = PMPI_Sendrecv
#elif defined(HAVE_PRAGMA_HP_SEC_DEF)
#pragma _HP_SECONDARY_DEF PMPI_Sendrecv MPI_Sendrecv
#elif defined(HAVE_PRAGMA_CRI_DUP)
#pragma _CRI duplicate MPI_Sendrecv as PMPI_Sendrecv
#elif defined(HAVE_WEAK_ATTRIBUTE)
int MPI_Sendrecv(const void *sendbuf, int sendcount, MPI_Datatype sendtype, int dest,
int sendtag, void *recvbuf, int recvcount, MPI_Datatype recvtype,
int source, int recvtag, MPI_Comm comm, MPI_Status * status)
__attribute__ ((weak, alias("PMPI_Sendrecv")));
#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_Sendrecv
#define MPI_Sendrecv PMPI_Sendrecv
#endif
#undef FUNCNAME
#define FUNCNAME MPI_Sendrecv
#undef FCNAME
#define FCNAME MPL_QUOTE(FUNCNAME)
/*@
MPI_Sendrecv - Sends and receives a message
Input Parameters:
+ sendbuf - initial address of send buffer (choice)
. sendcount - number of elements in send buffer (integer)
. sendtype - type of elements in send buffer (handle)
. dest - rank of destination (integer)
. sendtag - send tag (integer)
. recvcount - number of elements in receive buffer (integer)
. recvtype - type of elements in receive buffer (handle)
. source - rank of source (integer)
. recvtag - receive tag (integer)
- comm - communicator (handle)
Output Parameters:
+ recvbuf - initial address of receive buffer (choice)
- status - status object (Status). This refers to the receive operation.
.N ThreadSafe
.N Fortran
.N FortranStatus
.N Errors
.N MPI_SUCCESS
.N MPI_ERR_COMM
.N MPI_ERR_COUNT
.N MPI_ERR_TYPE
.N MPI_ERR_TAG
.N MPI_ERR_RANK
@*/
int MPI_Sendrecv(const void *sendbuf, int sendcount, MPI_Datatype sendtype,
int dest, int sendtag,
void *recvbuf, int recvcount, MPI_Datatype recvtype,
int source, int recvtag, MPI_Comm comm, MPI_Status * status)
{
int mpi_errno = MPI_SUCCESS;
MPIR_Comm *comm_ptr = NULL;
MPIR_Request *sreq = NULL;
MPIR_Request *rreq = NULL;
MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPI_SENDRECV);
MPIR_ERRTEST_INITIALIZED_ORDIE();
MPID_THREAD_CS_ENTER(VNI_GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);
MPIR_FUNC_TERSE_PT2PT_ENTER_BOTH(MPID_STATE_MPI_SENDRECV);
/* Validate handle parameters needing to be converted */
#ifdef HAVE_ERROR_CHECKING
{
MPID_BEGIN_ERROR_CHECKS;
{
MPIR_ERRTEST_COMM(comm, mpi_errno);
}
MPID_END_ERROR_CHECKS;
}
#endif /* HAVE_ERROR_CHECKING */
/* Convert handles to MPI objects. */
MPIR_Comm_get_ptr(comm, comm_ptr);
#ifdef HAVE_ERROR_CHECKING
{
MPID_BEGIN_ERROR_CHECKS;
{
/* Validate communicator */
MPIR_Comm_valid_ptr(comm_ptr, mpi_errno, FALSE);
if (mpi_errno)
goto fn_fail;
/* Validate count */
MPIR_ERRTEST_COUNT(sendcount, mpi_errno);
MPIR_ERRTEST_COUNT(recvcount, mpi_errno);
/* Validate status (status_ignore is not the same as null) */
MPIR_ERRTEST_ARGNULL(status, "status", mpi_errno);
/* Validate tags */
MPIR_ERRTEST_SEND_TAG(sendtag, mpi_errno);
MPIR_ERRTEST_RECV_TAG(recvtag, mpi_errno);
/* Validate source and destination */
if (comm_ptr) {
MPIR_ERRTEST_SEND_RANK(comm_ptr, dest, mpi_errno);
MPIR_ERRTEST_RECV_RANK(comm_ptr, source, mpi_errno);
}
/* Validate datatype handles */
MPIR_ERRTEST_DATATYPE(sendtype, "datatype", mpi_errno);
MPIR_ERRTEST_DATATYPE(recvtype, "datatype", mpi_errno);
/* Validate datatype objects */
if (HANDLE_GET_KIND(sendtype) != HANDLE_KIND_BUILTIN) {
MPIR_Datatype *datatype_ptr = NULL;
MPIR_Datatype_get_ptr(sendtype, datatype_ptr);
MPIR_Datatype_valid_ptr(datatype_ptr, mpi_errno);
if (mpi_errno)
goto fn_fail;
MPIR_Datatype_committed_ptr(datatype_ptr, mpi_errno);
if (mpi_errno)
goto fn_fail;
}
if (HANDLE_GET_KIND(recvtype) != HANDLE_KIND_BUILTIN) {
MPIR_Datatype *datatype_ptr = NULL;
MPIR_Datatype_get_ptr(recvtype, datatype_ptr);
MPIR_Datatype_valid_ptr(datatype_ptr, mpi_errno);
if (mpi_errno)
goto fn_fail;
MPIR_Datatype_committed_ptr(datatype_ptr, mpi_errno);
if (mpi_errno)
goto fn_fail;
}
/* Validate buffers */
MPIR_ERRTEST_USERBUFFER(sendbuf, sendcount, sendtype, mpi_errno);
MPIR_ERRTEST_USERBUFFER(recvbuf, recvcount, recvtype, mpi_errno);
}
MPID_END_ERROR_CHECKS;
}
#endif /* HAVE_ERROR_CHECKING */
/* ... body of routine ... */
mpi_errno =
MPID_Irecv(recvbuf, recvcount, recvtype, source, recvtag, comm_ptr,
MPIR_CONTEXT_INTRA_PT2PT, &rreq);
if (mpi_errno != MPI_SUCCESS)
goto fn_fail;
/* FIXME - Performance for small messages might be better if MPID_Send() were used here instead of MPID_Isend() */
mpi_errno =
MPID_Isend(sendbuf, sendcount, sendtype, dest, sendtag, comm_ptr, MPIR_CONTEXT_INTRA_PT2PT,
&sreq);
if (mpi_errno != MPI_SUCCESS) {
/* --BEGIN ERROR HANDLING-- */
if (mpi_errno == MPIX_ERR_NOREQ)
MPIR_ERR_SET(mpi_errno, MPI_ERR_OTHER, "**nomem");
/* FIXME: should we cancel the pending (possibly completed) receive request or wait for it to complete? */
MPIR_Request_free(rreq);
goto fn_fail;
/* --END ERROR HANDLING-- */
}
if (!MPIR_Request_is_complete(sreq) || !MPIR_Request_is_complete(rreq)) {
MPID_Progress_state progress_state;
MPID_Progress_start(&progress_state);
while (!MPIR_Request_is_complete(sreq) || !MPIR_Request_is_complete(rreq)) {
mpi_errno = MPID_Progress_wait(&progress_state);
if (mpi_errno != MPI_SUCCESS) {
/* --BEGIN ERROR HANDLING-- */
MPID_Progress_end(&progress_state);
goto fn_fail;
/* --END ERROR HANDLING-- */
}
if (unlikely(MPIR_Request_is_anysrc_mismatched(rreq))) {
/* --BEGIN ERROR HANDLING-- */
mpi_errno = MPIR_Request_handle_proc_failed(rreq);
if (!MPIR_Request_is_complete(sreq)) {
MPID_Cancel_send(sreq);
MPIR_STATUS_SET_CANCEL_BIT(sreq->status, FALSE);
}
goto fn_fail;
/* --END ERROR HANDLING-- */
}
}
MPID_Progress_end(&progress_state);
}
mpi_errno = rreq->status.MPI_ERROR;
MPIR_Request_extract_status(rreq, status);
MPIR_Request_free(rreq);
if (mpi_errno == MPI_SUCCESS) {
mpi_errno = sreq->status.MPI_ERROR;
}
MPIR_Request_free(sreq);
if (mpi_errno != MPI_SUCCESS)
goto fn_fail;
/* ... end of body of routine ... */
fn_exit:
MPIR_FUNC_TERSE_PT2PT_EXIT_BOTH(MPID_STATE_MPI_SENDRECV);
MPID_THREAD_CS_EXIT(VNI_GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);
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_sendrecv",
"**mpi_sendrecv %p %d %D %i %t %p %d %D %i %t %C %p", sendbuf,
sendcount, sendtype, dest, sendtag, recvbuf, recvcount, recvtype,
source, recvtag, comm, status);
}
#endif
mpi_errno = MPIR_Err_return_comm(comm_ptr, FCNAME, mpi_errno);
goto fn_exit;
/* --END ERROR HANDLING-- */
}