JNIEXPORT jboolean JNICALL Java_org_simgrid_msg_Comm_test(JNIEnv *env, jobject jcomm) {
msg_comm_t comm;
comm = (msg_comm_t) (uintptr_t) env->GetLongField(jcomm, jcomm_field_Comm_bind);
jboolean finished = env->GetBooleanField(jcomm, jcomm_field_Comm_finished);
if (finished == JNI_TRUE) {
return JNI_TRUE;
}
if (not comm) {
jxbt_throw_null(env, "comm is null");
return JNI_FALSE;
}
if (MSG_comm_test(comm)) {
msg_error_t status = MSG_comm_get_status(comm);
if (status == MSG_OK) {
jcomm_bind_task(env,jcomm);
return JNI_TRUE;
} else {
//send the correct exception
jmsg_throw_status(env,status);
}
}
return JNI_FALSE;
}
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;
}
/**
* Tracker main function
* @param argc number of arguments
* @param argv arguments
*/
int tracker(int argc, char *argv[])
{
int i;
RngStream stream = (RngStream) MSG_host_get_property_value(MSG_host_self(), "stream");
//Checking arguments
xbt_assert(argc == 2, "Wrong number of arguments for the tracker.");
//Retrieving end time
double deadline = atof(argv[1]);
xbt_assert(deadline > 0, "Wrong deadline supplied");
//Building peers array
xbt_dynar_t peers_list = xbt_dynar_new(sizeof(int), NULL);
XBT_INFO("Tracker launched.");
msg_comm_t comm_received = NULL;
msg_task_t task_received = NULL;
while (MSG_get_clock() < deadline) {
if (comm_received == NULL) {
comm_received = MSG_task_irecv(&task_received, TRACKER_MAILBOX);
}
if (MSG_comm_test(comm_received)) {
//Check for correct status
if (MSG_comm_get_status(comm_received) == MSG_OK) {
//Retrieve the data sent by the peer.
tracker_task_data_t data = MSG_task_get_data(task_received);
//Add the peer to our peer list.
if (!is_in_list(peers_list, data->peer_id)) {
xbt_dynar_push_as(peers_list, int, data->peer_id);
}
//Sending peers to the peer
int next_peer;
int peers_length = xbt_dynar_length(peers_list);
for (i = 0; i < MAXIMUM_PAIRS && i < peers_length; i++) {
do {
next_peer =
xbt_dynar_get_as(peers_list,
RngStream_RandInt(stream, 0, peers_length - 1),
int);
} while (is_in_list(data->peers, next_peer));
xbt_dynar_push_as(data->peers, int, next_peer);
}
//setting the interval
data->interval = TRACKER_QUERY_INTERVAL;
//sending the task back to the peer.
MSG_task_dsend(task_received, data->mailbox, task_free);
//destroy the communication.
}
MSG_comm_destroy(comm_received);
comm_received = NULL;
task_received = NULL;
} else {
int process_pending_connections(xbt_dynar_t q)
{
unsigned int iter;
int status;
int empty = 0;
msg_comm_t comm;
xbt_dynar_foreach(q, iter, comm) {
empty = 1;
if (MSG_comm_test(comm)) {
MSG_comm_destroy(comm);
status = MSG_comm_get_status(comm);
xbt_assert(status == MSG_OK, "process_pending_connections() failed");
xbt_dynar_cursor_rm(q, &iter);
empty = 0;
}
}
/**
* @brief Returns whether a communication is finished.
*
* Unlike wait(), This function always returns immediately.
*
* - Argument 1 (comm): a comm (previously created by isend or irecv)
* - Return values (task/boolean or nil + string): if the communication is not
* finished, return false. If the communication is finished and was successful,
* returns the task received if you are the receiver or true if you are the
* sender. If the communication is finished and has failed, returns nil
* plus an error string.
*/
static int l_comm_test(lua_State* L) {
msg_comm_t comm = sglua_check_comm(L, 1);
/* comm ... */
if (!MSG_comm_test(comm)) {
/* not finished yet */
lua_pushboolean(L, 0);
/* comm ... false */
return 1;
}
else {
/* finished but may have failed */
msg_error_t res = MSG_comm_get_status(comm);
if (res == MSG_OK) {
msg_task_t task = MSG_comm_get_task(comm);
if (MSG_task_get_sender(task) == MSG_process_self()) {
/* I'm the sender */
lua_pushboolean(L, 1);
/* comm ... true */
return 1;
}
else {
/* I'm the receiver: find the Lua task from the C task*/
sglua_task_unregister(L, task);
/* comm ... task */
return 1;
}
}
else {
/* the communication has failed */
lua_pushnil(L);
/* comm ... nil */
lua_pushstring(L, sglua_get_msg_error(res));
/* comm ... nil error */
return 2;
}
}
}
/**
* \brief Node Function
* Arguments:
* - my id
* - the id of a guy I know in the system (except for the first node)
* - the time to sleep before I join (except for the first node)
* - the deadline time
*/
static int node(int argc, char *argv[])
{
double init_time = MSG_get_clock();
msg_task_t task_received = NULL;
int join_success = 0;
double deadline;
xbt_assert(argc == 3 || argc == 5, "Wrong number of arguments for this node");
s_node_t node = {0};
node.id = xbt_str_parse_int(argv[1], "Invalid ID: %s");
node.known_id = -1;
node.ready = -1;
node.pending_tasks = xbt_fifo_new();
get_mailbox(node.id, node.mailbox);
XBT_DEBUG("New node with id %s (%08x)", node.mailbox, node.id);
int i,j,d;
for (i=0; i<LEVELS_COUNT; i++){
d = domain(node.id, i);
for (j=0; j<LEVEL_SIZE; j++)
node.routing_table[i][j] = (d==j) ? node.id : -1;
}
for (i=0; i<NEIGHBORHOOD_SIZE; i++)
node.neighborhood_set[i] = -1;
for (i=0; i<NAMESPACE_SIZE; i++)
node.namespace_set[i] = -1;
if (argc == 3) { // first ring
XBT_DEBUG("Hey! Let's create the system.");
deadline = xbt_str_parse_double(argv[2], "Invalid deadline: %s");
create(&node);
join_success = 1;
}
else {
node.known_id = xbt_str_parse_int(argv[2], "Invalid known ID: %s");
double sleep_time = xbt_str_parse_double(argv[3], "Invalid sleep time: %s");
deadline = xbt_str_parse_double(argv[4], "Invalid deadline: %s");
// sleep before starting
XBT_DEBUG("Let's sleep during %f", sleep_time);
MSG_process_sleep(sleep_time);
XBT_DEBUG("Hey! Let's join the system.");
join_success = join(&node);
}
if (join_success) {
XBT_DEBUG("Waiting ….");
while (MSG_get_clock() < init_time + deadline
// && MSG_get_clock() < node.last_change_date + 1000
&& MSG_get_clock() < max_simulation_time) {
if (node.comm_receive == NULL) {
task_received = NULL;
node.comm_receive = MSG_task_irecv(&task_received, node.mailbox);
// FIXME: do not make MSG_task_irecv() calls from several functions
}
if (!MSG_comm_test(node.comm_receive)) {
MSG_process_sleep(5);
} else {
// a transfer has occurred
msg_error_t status = MSG_comm_get_status(node.comm_receive);
if (status != MSG_OK) {
XBT_DEBUG("Failed to receive a task. Nevermind.");
MSG_comm_destroy(node.comm_receive);
node.comm_receive = NULL;
}
else {
// the task was successfully received
MSG_comm_destroy(node.comm_receive);
node.comm_receive = NULL;
handle_task(&node, task_received);
}
}
}
print_node(&node);
}
return 1;
}
