--- /dev/null
+/* Copyright (c) 2012-2014. The SimGrid Team.
+ * All rights reserved. */
+
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
+
+#include "peer.h"
+
+XBT_LOG_NEW_DEFAULT_CATEGORY(msg_peer, "Messages specific for the peer");
+
+void peer_init_chain(peer_t peer, message_t msg)
+{
+ peer->prev = msg->prev_hostname;
+ peer->next = msg->next_hostname;
+ peer->total_pieces = msg->num_pieces;
+ peer->init = 1;
+}
+
+static void peer_forward_msg(peer_t peer, message_t msg)
+{
+ msg_task_t task = task_message_data_new(NULL, msg->data_length);
+ msg_comm_t comm = NULL;
+ XBT_DEBUG("Sending (isend) from %s into mailbox %s", peer->me, peer->next);
+ comm = MSG_task_isend(task, peer->next);
+ queue_pending_connection(comm, peer->pending_sends);
+}
+
+int peer_execute_task(peer_t peer, msg_task_t task)
+{
+ int done = 0;
+ message_t msg = MSG_task_get_data(task);
+
+ XBT_DEBUG("Peer %s got message of type %d\n", peer->me, msg->type);
+ switch (msg->type) {
+ case MESSAGE_BUILD_CHAIN:
+ peer_init_chain(peer, msg);
+ break;
+ case MESSAGE_SEND_DATA:
+ xbt_assert(peer->init, "peer_execute_task() failed: got msg_type %d before initialization", msg->type);
+ if (peer->next != NULL)
+ peer_forward_msg(peer, msg);
+ peer->pieces++;
+ peer->bytes += msg->data_length;
+ if (peer->pieces >= peer->total_pieces) {
+ XBT_DEBUG("%d pieces receieved", peer->pieces);
+ done = 1;
+ }
+ break;
+ }
+
+ MSG_task_execute(task);
+
+ return done;
+}
+
+msg_error_t peer_wait_for_message(peer_t peer)
+{
+ msg_error_t status;
+ msg_comm_t comm = NULL;
+ msg_task_t task = NULL;
+ int idx = -1;
+ int done = 0;
+
+ while (!done) {
+ comm = MSG_task_irecv(&task, peer->me);
+ queue_pending_connection(comm, peer->pending_recvs);
+
+ if ((idx = MSG_comm_waitany(peer->pending_recvs)) != -1) {
+ comm = xbt_dynar_get_as(peer->pending_recvs, idx, msg_comm_t);
+ status = MSG_comm_get_status(comm);
+ XBT_DEBUG("peer_wait_for_message: error code = %d", status);
+ xbt_assert(status == MSG_OK, "peer_wait_for_message() failed");
+
+ task = MSG_comm_get_task(comm);
+ MSG_comm_destroy(comm);
+ xbt_dynar_cursor_rm(peer->pending_recvs, (unsigned int*)&idx);
+ done = peer_execute_task(peer, task);
+
+ task_message_delete(task);
+ task = NULL;
+ }
+ process_pending_connections(peer->pending_sends);
+ }
+
+ return status;
+}
+
+void peer_init(peer_t p, int argc, char *argv[])
+{
+ p->init = 0;
+ p->prev = NULL;
+ p->next = NULL;
+ p->pieces = 0;
+ p->bytes = 0;
+ p->pending_recvs = xbt_dynar_new(sizeof(msg_comm_t), NULL);
+ p->pending_sends = xbt_dynar_new(sizeof(msg_comm_t), NULL);
+ /* Set mailbox name: use host number from argv or hostname if no argument given */
+ if (argc > 1) {
+ p->me = bprintf("host%s", argv[1]);
+ } else {
+ p->me = xbt_strdup(MSG_host_get_name(MSG_host_self()));
+ }
+}
+
+void peer_shutdown(peer_t p)
+{
+ unsigned int size = xbt_dynar_length(p->pending_sends);
+ unsigned int idx;
+ msg_comm_t *comms = xbt_new(msg_comm_t, size);
+
+ for (idx = 0; idx < size; idx++) {
+ comms[idx] = xbt_dynar_get_as(p->pending_sends, idx, msg_comm_t);
+ }
+
+ XBT_DEBUG("Waiting for sends to finish before shutdown...");
+ MSG_comm_waitall(comms, size, PEER_SHUTDOWN_DEADLINE);
+
+ for (idx = 0; idx < size; idx++) {
+ MSG_comm_destroy(comms[idx]);
+ }
+
+ xbt_free(comms);
+}
+
+void peer_delete(peer_t p)
+{
+ xbt_dynar_free(&p->pending_recvs);
+ xbt_dynar_free(&p->pending_sends);
+ xbt_free(p->me);
+ xbt_free(p->prev);
+ xbt_free(p->next);
+
+ xbt_free(p);
+}
+
+void peer_print_stats(peer_t p, float elapsed_time)
+{
+ XBT_INFO("### %f %llu bytes (Avg %f MB/s); copy finished (simulated).", elapsed_time, p->bytes, p->bytes / 1024.0 / 1024.0 / elapsed_time);
+}
+
+/** Peer function */
+int peer(int argc, char *argv[])
+{
+ float start_time, end_time;
+ peer_t p = xbt_new(s_peer_t, 1);
+ msg_error_t status;
+
+ XBT_DEBUG("peer");
+
+ peer_init(p, argc, argv);
+ start_time = MSG_get_clock();
+ status = peer_wait_for_message(p);
+ peer_shutdown(p);
+ end_time = MSG_get_clock();
+ peer_print_stats(p, end_time - start_time);
+ peer_delete(p);
+
+ return status;
+}
