static void
leader_shutdown() {
LOG(0, ("Proposer %d dropping leadership\n", this_proposer_id));
evtimer_del(&p1_check_event);
evtimer_del(&p2_check_event);
#ifdef LEADER_EVENTS_UPDATE_INTERVAL
evtimer_del(&print_events_event);
#endif
//Iterate over currently open instances
p_inst_info * ii;
unsigned int i;
for(i = current_iid; i <= p1_info.highest_open; i++) {
ii = GET_PRO_INSTANCE(i);
if(ii->status != p2_completed && ii->p2_value != NULL) {
// A value was assigned to this instance, but it did
// not complete. Send back to the pending list for now
vh_push_back_value(ii->p2_value);
ii->p2_value = NULL;
}
//Clear all instances
pro_clear_instance_info(ii);
}
//This will clear all values in the pending list
// and notify the respective clients
vh_shutdown();
}
/*-------------------------------------------------------------------------*/
static void
leader_deliver(char * value, size_t size, iid_t iid, ballot_t ballot, int proposer) {
UNUSED_ARG(ballot);
UNUSED_ARG(proposer);
LOG(DBG, ("Instance %lu delivered to Leader\n", iid));
//Verify that the value is the one found or associated
p_inst_info * ii = GET_PRO_INSTANCE(iid);
//Instance not even initialized, skip
if(ii->iid != iid) {
return;
}
if(ii->status == p1_pending) {
p1_info.pending_count -= 1;
}
if(p2_info.next_unused_iid == iid) {
p2_info.next_unused_iid += 1;
}
int opened_by_me = (ii->status == p1_pending && ii->p2_value != NULL) ||
(ii->status == p1_ready && ii->p2_value != NULL) ||
(ii->status == p2_pending);
if(opened_by_me) {
p2_info.open_count -= 1;
}
int my_val = (ii->p2_value != NULL) &&
(ii->p2_value->value_size == size) &&
(memcmp(value, ii->p2_value->value, size) == 0);
if(my_val) {
//Our value accepted, notify client that submitted it
vh_notify_client(0, ii->p2_value);
} else if(ii->p2_value != NULL) {
//Different value accepted, push back our value
vh_push_back_value(ii->p2_value);
ii->p2_value = NULL;
} else {
//We assigned no value to this instance,
//it comes from somebody else??
}
//Clear current instance
pro_clear_instance_info(ii);
//If enough instances are ready to
// be opened, start phase2 for them
leader_open_instances_p2_new();
}
//Initialize structures
static int
init_pro_structs() {
//Check array size
if ((PROPOSER_ARRAY_SIZE & (PROPOSER_ARRAY_SIZE -1)) != 0) {
printf("Error: PROPOSER_ARRAY_SIZE is not a power of 2\n");
return PROPOSER_ERROR;
}
if (PROPOSER_ARRAY_SIZE <= PROPOSER_PREEXEC_WIN_SIZE) {
printf("Error: PROPOSER_ARRAY_SIZE = %d is too small\n",
PROPOSER_ARRAY_SIZE);
return PROPOSER_ERROR;
}
// Clear the state array
memset(proposer_state, 0, (sizeof(p_inst_info) * PROPOSER_ARRAY_SIZE));
size_t i;
for(i = 0; i < PROPOSER_ARRAY_SIZE; i++) {
pro_clear_instance_info(&proposer_state[i]);
}
return 0;
}
