3 int smpi_receiver(int argc, char **argv)
8 xbt_fifo_t request_queue;
9 smx_mutex_t request_queue_mutex;
10 xbt_fifo_t message_queue;
11 smx_mutex_t message_queue_mutex;
13 int running_hosts_count;
15 smpi_mpi_request_t request;
16 smpi_received_message_t message;
18 xbt_fifo_item_t request_item;
19 xbt_fifo_item_t message_item;
21 self = SIMIX_process_self();
23 // make sure root is done before own initialization
24 SIMIX_mutex_lock(smpi_global->start_stop_mutex);
25 if (!smpi_global->root_ready) {
26 SIMIX_cond_wait(smpi_global->start_stop_cond, smpi_global->start_stop_mutex);
28 SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
30 index = smpi_host_index();
32 request_queue = smpi_global->pending_recv_request_queues[index];
33 request_queue_mutex = smpi_global->pending_recv_request_queues_mutexes[index];
34 message_queue = smpi_global->received_message_queues[index];
35 message_queue_mutex = smpi_global->received_message_queues_mutexes[index];
37 smpi_global->receiver_processes[index] = self;
39 // wait for all nodes to signal initializatin complete
40 SIMIX_mutex_lock(smpi_global->start_stop_mutex);
41 smpi_global->ready_process_count++;
42 if (smpi_global->ready_process_count < 3 * smpi_global->host_count) {
43 SIMIX_cond_wait(smpi_global->start_stop_cond, smpi_global->start_stop_mutex);
45 SIMIX_cond_broadcast(smpi_global->start_stop_cond);
47 SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
53 // FIXME: better algorithm, maybe some kind of balanced tree? or a heap?
55 // FIXME: not the best way to request multiple locks...
56 SIMIX_mutex_lock(request_queue_mutex);
57 SIMIX_mutex_lock(message_queue_mutex);
58 for (request_item = xbt_fifo_get_first_item(request_queue);
60 request_item = xbt_fifo_get_next_item(request_item)) {
61 request = xbt_fifo_get_item_content(request_item);
62 for (message_item = xbt_fifo_get_first_item(message_queue);
64 message_item = xbt_fifo_get_next_item(message_item)) {
65 message = xbt_fifo_get_item_content(message_item);
66 if (request->comm == message->comm &&
67 (MPI_ANY_SOURCE == request->src || request->src == message->src) &&
68 (MPI_ANY_TAG == request->tag || request->tag == message->tag)) {
69 xbt_fifo_remove_item(request_queue, request_item);
70 xbt_fifo_remove_item(message_queue, message_item);
76 SIMIX_mutex_unlock(message_queue_mutex);
77 SIMIX_mutex_unlock(request_queue_mutex);
79 if (NULL == request || NULL == message) {
80 SIMIX_process_suspend(self);
83 SIMIX_mutex_lock(request->mutex);
84 memcpy(request->buf, message->buf, request->datatype->size * request->count);
85 request->src = message->src;
86 request->completed = 1;
87 SIMIX_cond_broadcast(request->cond);
88 SIMIX_mutex_unlock(request->mutex);
90 xbt_free(message->buf);
91 xbt_mallocator_release(smpi_global->message_mallocator, message);
95 SIMIX_mutex_lock(smpi_global->running_hosts_count_mutex);
96 running_hosts_count = smpi_global->running_hosts_count;
97 SIMIX_mutex_unlock(smpi_global->running_hosts_count_mutex);
99 } while (0 < running_hosts_count);