/**
* event-handler thread
*
*/
void *chassis_event_thread_loop(chassis_event_thread_t *thread) {
cur_thid = thread->index;
gboolean has_no_active_con = FALSE;
/**
* check once a second if we shall shutdown the proxy
*/
while (!chassis_is_shutdown_immediate() && (!chassis_is_shutdown_normal() || !has_no_active_con)) {
struct timeval timeout;
int r;
/* check exit status */
if (chassis_is_shutdown_normal()) {
if (thread->connection_nums == 0) {
has_no_active_con = TRUE;
g_log_dbproxy(g_debug, "no connection in thread %d", thread->index);
continue;
}
}
if (!chassis_is_shutdown_immediate()) {
chassis_event_thread_update_conn_status(thread);
}
timeout.tv_sec = 1;
timeout.tv_usec = 0;
g_assert(event_base_loopexit(thread->event_base, &timeout) == 0);
r = event_base_dispatch(thread->event_base);
if (r == -1) {
#ifdef WIN32
errno = WSAGetLastError();
#endif
if (errno == EINTR) continue;
g_log_dbproxy(g_critical, "leaving chassis_event_thread_loop early, errno != EINTR was: %s (%d)", g_strerror(errno), errno);
break;
}
}
g_log_dbproxy(g_message, "work thread %d will exit", thread->index);
g_atomic_int_set(&thread->exit_phase, EVENT_THREAD_EXITED);
return NULL;
}
static void chassis_event_thread_update_conn_status(chassis_event_thread_t *thread)
{
network_mysqld_con *conn = NULL;
GList *gl_conn = NULL;
network_mysqld_con_lua_t *st = NULL;
g_assert(thread != NULL);
gl_conn = thread->connection_list;
while (gl_conn) {
conn = gl_conn->data;
st = conn->plugin_con_state;
if (chassis_is_shutdown_normal() &&
g_atomic_int_get(&conn->conn_status.exit_phase) != CON_EXIT_TX) {
g_atomic_int_set(&conn->conn_status.exit_begin_time, time(NULL));
g_atomic_int_set(&conn->conn_status.exit_phase, CON_EXIT_TX);
}
if (g_atomic_int_get(&conn->conn_status.exit_phase) == CON_EXIT_KILL ||
g_atomic_int_get(&conn->conn_status.exit_phase) == CON_EXIT_TX) {
/*|| (st != NULL && st->backend != NULL && IS_BACKEND_WAITING_EXIT(st->backend)))*/
struct event *ev = NULL;
gchar *event_msg = NULL;
int pending = event_pending(&conn->client->event, EV_READ|EV_WRITE|EV_TIMEOUT, NULL);
if (pending) {
ev = &conn->client->event;
event_msg = "client";
} else {
pending = event_pending(&conn->server->event, EV_READ|EV_WRITE|EV_TIMEOUT, NULL);
ev = &conn->server->event;
event_msg = "server";
}
if (pending != 0) {
/*
* 1 stands for the times of calling callback function after manual active event,
* this parameter has been obsoleted at libevent-2.0.
*/
g_log_dbproxy(g_debug, "pending %s's %d event", event_msg, pending);
event_active(ev, pending, 1);
}
}
gl_conn = g_list_next(gl_conn);
}
}
gboolean chassis_is_shutdown() {
return (chassis_is_shutdown_normal() || chassis_is_shutdown_immediate());
}
