void
_bufferevent_decref_and_unlock(struct bufferevent *bufev)
{
struct bufferevent_private *bufev_private =
EVUTIL_UPCAST(bufev, struct bufferevent_private, bev);
struct bufferevent *underlying;
if (--bufev_private->refcnt) {
BEV_UNLOCK(bufev);
return;
}
underlying = bufferevent_get_underlying(bufev);
/* Clean up the shared info */
if (bufev->be_ops->destruct)
bufev->be_ops->destruct(bufev);
/* XXX what happens if refcnt for these buffers is > 1?
* The buffers can share a lock with this bufferevent object,
* but the lock might be destroyed below. */
/* evbuffer will free the callbacks */
evbuffer_free(bufev->input);
evbuffer_free(bufev->output);
if (bufev_private->rate_limiting) {
if (bufev_private->rate_limiting->group)
bufferevent_remove_from_rate_limit_group(bufev);
if (event_initialized(&bufev_private->rate_limiting->refill_bucket_event))
event_del(&bufev_private->rate_limiting->refill_bucket_event);
event_debug_unassign(&bufev_private->rate_limiting->refill_bucket_event);
mm_free(bufev_private->rate_limiting);
bufev_private->rate_limiting = NULL;
}
event_debug_unassign(&bufev->ev_read);
event_debug_unassign(&bufev->ev_write);
BEV_UNLOCK(bufev);
if (bufev_private->own_lock)
EVTHREAD_FREE_LOCK(bufev_private->lock,
EVTHREAD_LOCKTYPE_RECURSIVE);
/* Free the actual allocated memory. */
mm_free(bufev - bufev->be_ops->mem_offset);
/* release the reference to underlying now that we no longer need
* the reference to it. This is mainly in case our lock is shared
* with underlying.
* XXX Should we/can we just refcount evbuffer/bufferevent locks?
* It would probably save us some headaches.
*/
if (underlying)
bufferevent_decref(underlying);
}
void
evsig_dealloc(struct event_base *base)
{
int i = 0;
if (base->sig.ev_signal_added) {
event_del(&base->sig.ev_signal);
event_debug_unassign(&base->sig.ev_signal);
base->sig.ev_signal_added = 0;
}
for (i = 0; i < NSIG; ++i) {
if (i < base->sig.sh_old_max && base->sig.sh_old[i] != NULL)
_evsig_restore_handler(base, i);
}
if (base->sig.ev_signal_pair[0] != -1) {
EVUTIL_CLOSESOCKET(base->sig.ev_signal_pair[0]);
base->sig.ev_signal_pair[0] = -1;
}
if (base->sig.ev_signal_pair[1] != -1) {
EVUTIL_CLOSESOCKET(base->sig.ev_signal_pair[1]);
base->sig.ev_signal_pair[1] = -1;
}
base->sig.sh_old_max = 0;
/* per index frees are handled in evsig_del() */
if (base->sig.sh_old) {
mm_free(base->sig.sh_old);
base->sig.sh_old = NULL;
}
}
static void
event_listener_destroy(struct evconnlistener *lev)
{
struct evconnlistener_event *lev_e =
EVUTIL_UPCAST(lev, struct evconnlistener_event, base);
event_del(&lev_e->listener);
if (lev->flags & LEV_OPT_CLOSE_ON_FREE)
evutil_closesocket(event_get_fd(&lev_e->listener));
event_debug_unassign(&lev_e->listener);
}
void
evsig_dealloc(struct event_base *base)
{
int i = 0;
if (base->sig.ev_signal_added) {
event_del(&base->sig.ev_signal);//删除信号事件
base->sig.ev_signal_added = 0;
}
/* debug event is created in evsig_init/event_assign even when
* ev_signal_added == 0, so unassign is required */
event_debug_unassign(&base->sig.ev_signal);
//恢复所有的信号处理函数
for (i = 0; i < NSIG; ++i) {
if (i < base->sig.sh_old_max && base->sig.sh_old[i] != NULL)
_evsig_restore_handler(base, i);
}
EVSIGBASE_LOCK();
if (base == evsig_base) {
evsig_base = NULL;
evsig_base_n_signals_added = 0;
evsig_base_fd = -1;
}
EVSIGBASE_UNLOCK();
//关闭socketpair描述府
if (base->sig.ev_signal_pair[0] != -1) {
evutil_closesocket(base->sig.ev_signal_pair[0]);
base->sig.ev_signal_pair[0] = -1;
}
if (base->sig.ev_signal_pair[1] != -1) {
evutil_closesocket(base->sig.ev_signal_pair[1]);
base->sig.ev_signal_pair[1] = -1;
}
base->sig.sh_old_max = 0;
/* per index frees are handled in evsig_del() */
if (base->sig.sh_old) {
mm_free(base->sig.sh_old);
base->sig.sh_old = NULL;
}
}
void
evsig_dealloc(struct event_base *base)
{
int i = 0;
if (base->sig.ev_signal_added) {
event_del(&base->sig.ev_signal);
event_debug_unassign(&base->sig.ev_signal);
base->sig.ev_signal_added = 0;
}
for (i = 0; i < NSIG; ++i) {
if (i < base->sig.sh_old_max && base->sig.sh_old[i] != NULL)
_evsig_restore_handler(base, i);
}
EVSIGBASE_LOCK();
if (base == evsig_base) {
evsig_base = NULL;
evsig_base_n_signals_added = 0;
evsig_base_fd = -1;
}
EVSIGBASE_UNLOCK();
if (base->sig.ev_signal_pair[0] != -1) {
evutil_closesocket(base->sig.ev_signal_pair[0]);
base->sig.ev_signal_pair[0] = -1;
}
if (base->sig.ev_signal_pair[1] != -1) {
evutil_closesocket(base->sig.ev_signal_pair[1]);
base->sig.ev_signal_pair[1] = -1;
}
base->sig.sh_old_max = 0;
/* per index frees are handled in evsig_del() */
if (base->sig.sh_old) {
mm_free(base->sig.sh_old);
base->sig.sh_old = NULL;
}
}
