/* state change means moving between lists */
void change_client_state(PgSocket *client, SocketState newstate)
{
PgPool *pool = client->pool;
/* remove from old location */
switch (client->state) {
case CL_FREE:
break;
case CL_JUSTFREE:
statlist_remove(&justfree_client_list, &client->head);
break;
case CL_LOGIN:
if (newstate == CL_WAITING)
newstate = CL_WAITING_LOGIN;
statlist_remove(&login_client_list, &client->head);
break;
case CL_WAITING_LOGIN:
if (newstate == CL_ACTIVE)
newstate = CL_LOGIN;
case CL_WAITING:
statlist_remove(&pool->waiting_client_list, &client->head);
break;
case CL_ACTIVE:
statlist_remove(&pool->active_client_list, &client->head);
break;
case CL_CANCEL:
statlist_remove(&pool->cancel_req_list, &client->head);
break;
default:
fatal("bad cur client state: %d", client->state);
}
client->state = newstate;
/* put to new location */
switch (client->state) {
case CL_FREE:
varcache_clean(&client->vars);
slab_free(client_cache, client);
break;
case CL_JUSTFREE:
statlist_append(&justfree_client_list, &client->head);
break;
case CL_LOGIN:
statlist_append(&login_client_list, &client->head);
break;
case CL_WAITING:
case CL_WAITING_LOGIN:
statlist_append(&pool->waiting_client_list, &client->head);
break;
case CL_ACTIVE:
statlist_append(&pool->active_client_list, &client->head);
break;
case CL_CANCEL:
statlist_append(&pool->cancel_req_list, &client->head);
break;
default:
fatal("bad new client state: %d", client->state);
}
}
static void launch_db(const char *dbname)
{
struct PgDatabase *db;
db = calloc(1, sizeof(*db));
db->name = strdup(dbname);
statlist_init(&db->maint_item_list, "maint_item_list");
list_init(&db->head);
statlist_append(&database_list, &db->head);
launch_ticker(db);
}
/* state change means moving between lists */
void change_server_state(PgSocket *server, SocketState newstate)
{
PgPool *pool = server->pool;
/* remove from old location */
switch (server->state) {
case SV_FREE:
break;
case SV_JUSTFREE:
statlist_remove(&justfree_server_list, &server->head);
break;
case SV_LOGIN:
statlist_remove(&pool->new_server_list, &server->head);
break;
case SV_USED:
statlist_remove(&pool->used_server_list, &server->head);
break;
case SV_TESTED:
statlist_remove(&pool->tested_server_list, &server->head);
break;
case SV_IDLE:
statlist_remove(&pool->idle_server_list, &server->head);
break;
case SV_ACTIVE:
statlist_remove(&pool->active_server_list, &server->head);
break;
default:
fatal("change_server_state: bad old server state: %d", server->state);
}
server->state = newstate;
/* put to new location */
switch (server->state) {
case SV_FREE:
varcache_clean(&server->vars);
slab_free(server_cache, server);
break;
case SV_JUSTFREE:
statlist_append(&justfree_server_list, &server->head);
break;
case SV_LOGIN:
statlist_append(&pool->new_server_list, &server->head);
break;
case SV_USED:
/* use LIFO */
statlist_prepend(&pool->used_server_list, &server->head);
break;
case SV_TESTED:
statlist_append(&pool->tested_server_list, &server->head);
break;
case SV_IDLE:
if (server->close_needed || cf_server_round_robin) {
/* try to avoid immediate usage then */
statlist_append(&pool->idle_server_list, &server->head);
} else {
/* otherwise use LIFO */
statlist_prepend(&pool->idle_server_list, &server->head);
}
break;
case SV_ACTIVE:
statlist_append(&pool->active_server_list, &server->head);
break;
default:
fatal("bad server state");
}
}