1 #include "broadcaster.h"
3 XBT_LOG_NEW_DEFAULT_CATEGORY(msg_broadcaster,
4 "Messages specific for the broadcaster");
6 xbt_dynar_t build_hostlist_from_hostcount(int hostcount)
8 xbt_dynar_t host_list = xbt_dynar_new(sizeof(char*), NULL);
12 for (; i < hostcount+1; i++) {
13 hostname = xbt_new(char, HOSTNAME_LENGTH);
14 snprintf(hostname, HOSTNAME_LENGTH, "host%d", i);
15 XBT_DEBUG("%s", hostname);
16 xbt_dynar_push(host_list, &hostname);
21 int broadcaster_build_chain(broadcaster_t bc)
23 msg_task_t task = NULL;
24 char **cur = (char**)xbt_dynar_iterator_next(bc->it);
25 const char *me = "host0"; /* FIXME: hardcoded*/ /*MSG_host_get_name(MSG_host_self());*/
26 const char *current_host = NULL;
27 const char *prev = NULL;
28 const char *next = NULL;
29 const char *last = NULL;
31 /* Build the chain if there's at least one peer */
33 /* init: prev=NULL, host=current cur, next=next cur */
37 /* This iterator iterates one step ahead: cur is current iterated element,
38 but it's actually the next one in the chain */
40 /* following steps: prev=last, host=next, next=cur */
41 cur = (char**)xbt_dynar_iterator_next(bc->it);
48 XBT_DEBUG("Building chain -- broadcaster:\"%s\" dest:\"%s\" prev:\"%s\" next:\"%s\"", me, current_host, prev, next);
50 /* Send message to current peer */
51 task = task_message_chain_new(me, current_host, prev, next);
52 //MSG_task_set_category(task, current_host);
53 MSG_task_send(task, current_host);
56 } while (cur != NULL);
62 int broadcaster_send_file(broadcaster_t bc)
64 const char *me = "host0"; /* FIXME: hardcoded*/ /*MSG_host_get_name(MSG_host_self());*/
65 //msg_comm_t comm = NULL;
66 msg_task_t task = NULL;
68 bc->current_piece = 0;
70 while (bc->current_piece < bc->piece_count) {
71 task = task_message_data_new(me, bc->first, NULL, PIECE_SIZE);
72 XBT_DEBUG("Sending (send) piece %d from %s into mailbox %s", bc->current_piece, me, bc->first);
73 MSG_task_send(task, bc->first);
80 int broadcaster_finish(broadcaster_t bc)
82 msg_task_t task = NULL;
83 const char *me = "host0"; /* FIXME: hardcoded*/ /*MSG_host_get_name(MSG_host_self());*/
84 const char *current_host = NULL;
87 xbt_dynar_iterator_seek(bc->it, 0);
89 /* Send goodbye message to every peer in the order generated by iterator it */
90 for (cur = (char**)xbt_dynar_iterator_next(bc->it); cur != NULL; cur = (char**)xbt_dynar_iterator_next(bc->it)) {
91 /* Send message to current peer */
93 task = task_message_end_data_new(me, current_host);
94 //MSG_task_set_category(task, current_host);
95 MSG_task_send(task, current_host);
101 broadcaster_t broadcaster_init(xbt_dynar_t host_list, unsigned int piece_count)
104 broadcaster_t bc = xbt_new(s_broadcaster_t, 1);
106 bc->piece_count = piece_count;
107 bc->current_piece = 0;
108 bc->host_list = host_list;
109 bc->it = xbt_dynar_iterator_new(bc->host_list, forward_indices_list);
110 bc->max_pending_sends = MAX_PENDING_SENDS;
111 bc->pending_sends = xbt_dynar_new(sizeof(msg_comm_t), NULL);
113 status = broadcaster_build_chain(bc);
114 xbt_assert(status == MSG_OK, "Chain initialization failed");
119 static void broadcaster_destroy(broadcaster_t bc)
121 /* Destroy iterator and hostlist */
122 xbt_dynar_iterator_delete(bc->it);
123 xbt_dynar_free(&bc->pending_sends);
124 xbt_dynar_free(&bc->host_list);
127 /** Emitter function */
128 int broadcaster(int argc, char *argv[])
130 broadcaster_t bc = NULL;
131 xbt_dynar_t host_list = NULL;
133 unsigned int piece_count = PIECE_COUNT;
135 XBT_DEBUG("broadcaster");
137 /* Add every mailbox given by the hostcount in argv[1] to a dynamic array */
138 host_list = build_hostlist_from_hostcount(atoi(argv[1]));
140 /* argv[2] is the number of pieces */
142 piece_count = atoi(argv[2]);
143 XBT_DEBUG("piece_count set to %d", piece_count);
145 XBT_DEBUG("No piece_count specified, defaulting to %d", piece_count);
147 bc = broadcaster_init(host_list, piece_count);
149 /* TODO: Error checking */
150 status = broadcaster_send_file(bc);
151 status = broadcaster_finish(bc);
153 broadcaster_destroy(bc);