+#include "private.h"
+
+SMPI_MPI_Global_t smpi_mpi_global = NULL;
+
+void smpi_mpi_land_func(void *x, void *y, void *z)
+{
+ *(int *)z = *(int *)x && *(int *)y;
+}
+
+void smpi_mpi_sum_func(void *x, void *y, void *z)
+{
+ *(int *)z = *(int *)x + *(int *)y;
+}
+
+int inline smpi_mpi_comm_size(smpi_mpi_communicator_t *comm)
+{
+ return comm->size;
+}
+
+// FIXME: smarter algorithm?
+int smpi_mpi_comm_rank(smpi_mpi_communicator_t *comm, smx_host_t host)
+{
+ int i;
+
+ for(i = comm->size - 1; i > 0 && host != comm->simdata->hosts[i]; i--);
+
+ return i;
+}
+
+int inline smpi_mpi_comm_rank_self(smpi_mpi_communicator_t *comm)
+{
+ return smpi_mpi_comm_rank(comm, SIMIX_host_self());
+}
+
+void smpi_mpi_init()
+{
+ smx_process_t process;
+ smx_host_t host;
+ smx_host_t *hosts;
+ int size;
+
+ SIMIX_mutex_lock(smpi_global->running_hosts_count_mutex);
+ smpi_global->running_hosts_count++;
+ SIMIX_mutex_unlock(smpi_global->running_hosts_count_mutex);
+
+ // initialize some local variables
+ process = SIMIX_process_self();
+ host = SIMIX_host_self();
+ hosts = SIMIX_host_get_table();
+ size = SIMIX_host_get_number();
+
+ // node 0 sets the globals
+ if (host == hosts[0]) {
+
+ smpi_mpi_global = xbt_new(s_SMPI_MPI_Global_t, 1);
+
+ // global communicator
+ smpi_mpi_global->mpi_comm_world = xbt_new(smpi_mpi_communicator_t, 1);
+ smpi_mpi_global->mpi_comm_world->size = size;
+ smpi_mpi_global->mpi_comm_world->simdata = xbt_new(s_smpi_mpi_communicator_simdata_t, 1);
+ smpi_mpi_global->mpi_comm_world->simdata->barrier_count = 0;
+ smpi_mpi_global->mpi_comm_world->simdata->barrier_mutex = SIMIX_mutex_init();
+ smpi_mpi_global->mpi_comm_world->simdata->barrier_cond = SIMIX_cond_init();
+ smpi_mpi_global->mpi_comm_world->simdata->hosts = hosts;
+ smpi_mpi_global->mpi_comm_world->simdata->processes = xbt_new(smx_process_t, size);
+ smpi_mpi_global->mpi_comm_world->simdata->processes[0] = process;
+
+ // mpi datatypes
+ smpi_mpi_global->mpi_byte = xbt_new(smpi_mpi_datatype_t, 1);
+ smpi_mpi_global->mpi_byte->size = (size_t)1;
+ smpi_mpi_global->mpi_int = xbt_new(smpi_mpi_datatype_t, 1);
+ smpi_mpi_global->mpi_int->size = sizeof(int);
+ smpi_mpi_global->mpi_double = xbt_new(smpi_mpi_datatype_t, 1);
+ smpi_mpi_global->mpi_double->size = sizeof(double);
+
+ // mpi operations
+ smpi_mpi_global->mpi_land = xbt_new(smpi_mpi_op_t, 1);
+ smpi_mpi_global->mpi_land->func = smpi_mpi_land_func;
+ smpi_mpi_global->mpi_sum = xbt_new(smpi_mpi_op_t, 1);
+ smpi_mpi_global->mpi_sum->func = smpi_mpi_sum_func;
+
+ // signal all nodes to perform initialization
+ SIMIX_mutex_lock(smpi_global->start_stop_mutex);
+ smpi_global->root_ready = 1;
+ SIMIX_cond_broadcast(smpi_global->start_stop_cond);
+ SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
+
+ } else {
+
+ // make sure root is done before own initialization
+ SIMIX_mutex_lock(smpi_global->start_stop_mutex);
+ if (!smpi_global->root_ready) {
+ SIMIX_cond_wait(smpi_global->start_stop_cond, smpi_global->start_stop_mutex);
+ }
+ SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
+
+ smpi_mpi_global->mpi_comm_world->simdata->processes[smpi_mpi_comm_rank_self(smpi_mpi_global->mpi_comm_world)] = process;
+ }
+
+ // wait for all nodes to signal initializatin complete
+ SIMIX_mutex_lock(smpi_global->start_stop_mutex);
+ smpi_global->ready_process_count++;
+ if (smpi_global->ready_process_count < 3 * size) {
+ SIMIX_cond_wait(smpi_global->start_stop_cond, smpi_global->start_stop_mutex);
+ } else {
+ SIMIX_cond_broadcast(smpi_global->start_stop_cond);
+ }
+ SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
+
+ return;
+}
+
+void smpi_mpi_finalize()
+{
+ int i;
+
+ SIMIX_mutex_lock(smpi_global->running_hosts_count_mutex);
+ i = --smpi_global->running_hosts_count;
+ SIMIX_mutex_unlock(smpi_global->running_hosts_count_mutex);
+
+ SIMIX_mutex_lock(smpi_global->start_stop_mutex);
+ smpi_global->ready_process_count--;
+ SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
+
+ if (0 >= i) {
+
+ // wake up senders/receivers
+ for (i = 0; i < smpi_mpi_global->mpi_comm_world->size; i++) {
+ if (SIMIX_process_is_suspended(smpi_global->sender_processes[i])) {
+ SIMIX_process_resume(smpi_global->sender_processes[i]);
+ }
+ if (SIMIX_process_is_suspended(smpi_global->receiver_processes[i])) {
+ SIMIX_process_resume(smpi_global->receiver_processes[i]);
+ }
+ }
+
+ // wait for senders/receivers to exit...
+ SIMIX_mutex_lock(smpi_global->start_stop_mutex);
+ if (smpi_global->ready_process_count > 0) {
+ SIMIX_cond_wait(smpi_global->start_stop_cond, smpi_global->start_stop_mutex);
+ }
+ SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
+
+ SIMIX_mutex_destroy(smpi_mpi_global->mpi_comm_world->simdata->barrier_mutex);
+ SIMIX_cond_destroy(smpi_mpi_global->mpi_comm_world->simdata->barrier_cond);
+ xbt_free(smpi_mpi_global->mpi_comm_world->simdata->processes);
+ xbt_free(smpi_mpi_global->mpi_comm_world->simdata);
+ xbt_free(smpi_mpi_global->mpi_comm_world);
+
+ xbt_free(smpi_mpi_global->mpi_byte);
+ xbt_free(smpi_mpi_global->mpi_int);
+ xbt_free(smpi_mpi_global->mpi_double);
+
+ xbt_free(smpi_mpi_global->mpi_land);
+ xbt_free(smpi_mpi_global->mpi_sum);
+
+ xbt_free(smpi_mpi_global);
+ }
+
+}
+
+void smpi_barrier(smpi_mpi_communicator_t *comm)
+{
+
+ SIMIX_mutex_lock(comm->simdata->barrier_mutex);
+ if(++comm->simdata->barrier_count < comm->size) {
+ SIMIX_cond_wait(comm->simdata->barrier_cond, comm->simdata->barrier_mutex);
+ } else {
+ comm->simdata->barrier_count = 0;
+ SIMIX_cond_broadcast(comm->simdata->barrier_cond);
+ }
+ SIMIX_mutex_unlock(comm->simdata->barrier_mutex);
+
+ return;
+}
+
+int smpi_create_request(void *buf, int count, smpi_mpi_datatype_t *datatype,
+ int src, int dst, int tag, smpi_mpi_communicator_t *comm, smpi_mpi_request_t **request)
+{
+ int retval = MPI_SUCCESS;
+
+ *request = NULL;
+
+ if (0 > count) {
+ retval = MPI_ERR_COUNT;
+ } else if (NULL == buf) {
+ retval = MPI_ERR_INTERN;
+ } else if (NULL == datatype) {
+ retval = MPI_ERR_TYPE;
+ } else if (NULL == comm) {
+ retval = MPI_ERR_COMM;
+ } else if (MPI_ANY_SOURCE != src && (0 > src || comm->size <= src)) {
+ retval = MPI_ERR_RANK;
+ } else if (0 > dst || comm->size <= dst) {
+ retval = MPI_ERR_RANK;
+ } else if (0 > tag) {
+ retval = MPI_ERR_TAG;
+ } else {
+ *request = xbt_mallocator_get(smpi_global->request_mallocator);
+ (*request)->comm = comm;
+ (*request)->src = src;
+ (*request)->dst = dst;
+ (*request)->tag = tag;
+ (*request)->buf = buf;
+ (*request)->count = count;
+ (*request)->datatype = datatype;
+ }
+ return retval;
+}
+
+int smpi_isend(smpi_mpi_request_t *request)
+{
+ int retval = MPI_SUCCESS;
+ int rank = smpi_mpi_comm_rank_self(smpi_mpi_global->mpi_comm_world);
+
+ if (NULL != request) {
+ SIMIX_mutex_lock(smpi_global->pending_send_request_queues_mutexes[rank]);
+ xbt_fifo_push(smpi_global->pending_send_request_queues[rank], request);
+ SIMIX_mutex_unlock(smpi_global->pending_send_request_queues_mutexes[rank]);
+ }
+
+ if (SIMIX_process_is_suspended(smpi_global->sender_processes[rank])) {
+ SIMIX_process_resume(smpi_global->sender_processes[rank]);
+ }
+
+ return retval;
+}
+
+int smpi_irecv(smpi_mpi_request_t *request)
+{
+ int retval = MPI_SUCCESS;
+ int rank = smpi_mpi_comm_rank_self(smpi_mpi_global->mpi_comm_world);
+
+ if (NULL != request) {
+ SIMIX_mutex_lock(smpi_global->pending_recv_request_queues_mutexes[rank]);
+ xbt_fifo_push(smpi_global->pending_recv_request_queues[rank], request);
+ SIMIX_mutex_unlock(smpi_global->pending_recv_request_queues_mutexes[rank]);
+ }
+
+ if (SIMIX_process_is_suspended(smpi_global->receiver_processes[rank])) {
+ SIMIX_process_resume(smpi_global->receiver_processes[rank]);
+ }
+
+ return retval;
+}
+
+void smpi_wait(smpi_mpi_request_t *request, smpi_mpi_status_t *status)
+{
+ if (NULL != request) {
+ SIMIX_mutex_lock(request->simdata->mutex);
+ if (!request->completed) {
+ SIMIX_cond_wait(request->simdata->cond, request->simdata->mutex);
+ }
+ if (NULL != status) {
+ status->MPI_SOURCE = request->src;
+ }
+ SIMIX_mutex_unlock(request->simdata->mutex);
+ }
+}