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/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
/*
* Copyright (c) 2015-2018 Los Alamos National Security, LLC. All rights
* reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "osc_rdma.h"
#include "osc_rdma_sync.h"
static void ompi_osc_rdma_sync_constructor (ompi_osc_rdma_sync_t *rdma_sync)
{
rdma_sync->type = OMPI_OSC_RDMA_SYNC_TYPE_NONE;
rdma_sync->epoch_active = false;
rdma_sync->outstanding_rdma.counter = 0;
OBJ_CONSTRUCT(&rdma_sync->lock, opal_mutex_t);
OBJ_CONSTRUCT(&rdma_sync->demand_locked_peers, opal_list_t);
}
static void ompi_osc_rdma_sync_destructor (ompi_osc_rdma_sync_t *rdma_sync)
{
OBJ_DESTRUCT(&rdma_sync->lock);
OBJ_DESTRUCT(&rdma_sync->demand_locked_peers);
}
OBJ_CLASS_INSTANCE(ompi_osc_rdma_sync_t, opal_object_t, ompi_osc_rdma_sync_constructor,
ompi_osc_rdma_sync_destructor);
ompi_osc_rdma_sync_t *ompi_osc_rdma_sync_allocate (struct ompi_osc_rdma_module_t *module)
{
ompi_osc_rdma_sync_t *rdma_sync;
rdma_sync = OBJ_NEW (ompi_osc_rdma_sync_t);
if (OPAL_UNLIKELY(NULL == rdma_sync)) {
return NULL;
}
rdma_sync->module = module;
return rdma_sync;
}
void ompi_osc_rdma_sync_return (ompi_osc_rdma_sync_t *rdma_sync)
{
OBJ_RELEASE(rdma_sync);
}
static inline bool ompi_osc_rdma_sync_array_peer (int rank, ompi_osc_rdma_peer_t **peers, size_t nranks,
struct ompi_osc_rdma_peer_t **peer)
{
int mid = nranks / 2;
/* base cases */
if (0 == nranks || (1 == nranks && peers[0]->rank != rank)) {
*peer = NULL;
return false;
} else if (peers[0]->rank == rank) {
*peer = peers[0];
return true;
}
if (peers[mid]->rank > rank) {
return ompi_osc_rdma_sync_array_peer (rank, peers, mid, peer);
}
return ompi_osc_rdma_sync_array_peer (rank, peers + mid, nranks - mid, peer);
}
bool ompi_osc_rdma_sync_pscw_peer (ompi_osc_rdma_module_t *module, int target, struct ompi_osc_rdma_peer_t **peer)
{
ompi_osc_rdma_sync_t *rdma_sync = &module->all_sync;
/* check synchronization type */
if (OMPI_OSC_RDMA_SYNC_TYPE_PSCW != rdma_sync->type) {
*peer = NULL;
return false;
}
return ompi_osc_rdma_sync_array_peer (target, rdma_sync->peer_list.peers, rdma_sync->num_peers, peer);
}
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