/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
/*
* (C) 2001 by Argonne National Laboratory.
* See COPYRIGHT in top-level directory.
*/
#include "mpidimpl.h"
#undef FUNCNAME
#define FUNCNAME MPID_Probe
#undef FCNAME
#define FCNAME MPL_QUOTE(FUNCNAME)
int MPID_Probe(int source, int tag, MPIR_Comm * comm, int context_offset,
MPI_Status * status)
{
MPID_Progress_state progress_state;
const int context = comm->recvcontext_id + context_offset;
int mpi_errno = MPI_SUCCESS;
MPIR_FUNC_VERBOSE_STATE_DECL(MPID_STATE_MPID_PROBE);
MPIR_FUNC_VERBOSE_ENTER(MPID_STATE_MPID_PROBE);
if (source == MPI_PROC_NULL)
{
MPIR_Status_set_procnull(status);
goto fn_exit;
}
/* Check to make sure the communicator hasn't already been revoked */
if (comm->revoked &&
MPIR_AGREE_TAG != MPIR_TAG_MASK_ERROR_BITS(tag & ~MPIR_TAG_COLL_BIT) &&
MPIR_SHRINK_TAG != MPIR_TAG_MASK_ERROR_BITS(tag & ~MPIR_TAG_COLL_BIT)) {
MPIR_ERR_SETANDJUMP(mpi_errno,MPIX_ERR_REVOKED,"**revoked");
}
#ifdef ENABLE_COMM_OVERRIDES
if (MPIDI_Anysource_iprobe_fn) {
if (source == MPI_ANY_SOURCE) {
/* if it's anysource, loop while checking the shm recv
queue and iprobing the netmod, then do a progress
test to make some progress. */
do {
int found;
MPID_THREAD_CS_ENTER(POBJ, MPIR_THREAD_POBJ_MSGQ_MUTEX);
found = MPIDI_CH3U_Recvq_FU(source, tag, context, status);
MPID_THREAD_CS_EXIT(POBJ, MPIR_THREAD_POBJ_MSGQ_MUTEX);
if (found) goto fn_exit;
mpi_errno = MPIDI_Anysource_iprobe_fn(tag, comm, context_offset, &found, status);
if (mpi_errno) MPIR_ERR_POP(mpi_errno);
if (found) goto fn_exit;
MPID_THREAD_CS_YIELD(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);
mpi_errno = MPIDI_CH3_Progress_test();
if (mpi_errno) MPIR_ERR_POP(mpi_errno);
} while (1);
} else {
/* it's not anysource, see if this is for the netmod */
MPIDI_VC_t * vc;
MPIDI_Comm_get_vc_set_active(comm, source, &vc);
if (vc->comm_ops && vc->comm_ops->iprobe) {
/* netmod has overridden iprobe */
do {
int found;
mpi_errno = vc->comm_ops->iprobe(vc, source, tag, comm, context_offset, &found,
status);
if (mpi_errno) MPIR_ERR_POP(mpi_errno);
if (found) goto fn_exit;
MPID_THREAD_CS_YIELD(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);
mpi_errno = MPIDI_CH3_Progress_test();
if (mpi_errno) MPIR_ERR_POP(mpi_errno);
} while (1);
}
/* fall-through to shm case */
}
}
#endif
MPIDI_CH3_Progress_start(&progress_state);
do
{
int found;
MPID_THREAD_CS_ENTER(POBJ, MPIR_THREAD_POBJ_MSGQ_MUTEX);
found = MPIDI_CH3U_Recvq_FU(source, tag, context, status);
MPID_THREAD_CS_EXIT(POBJ, MPIR_THREAD_POBJ_MSGQ_MUTEX);
if (found) break;
mpi_errno = MPIDI_CH3_Progress_wait(&progress_state);
}
while(mpi_errno == MPI_SUCCESS);
MPIDI_CH3_Progress_end(&progress_state);
fn_exit:
MPIR_FUNC_VERBOSE_EXIT(MPID_STATE_MPID_PROBE);
return mpi_errno;
fn_fail:
goto fn_exit;
}