static void
bev_async_consider_writing(struct bufferevent_async *beva)
{
size_t at_most;
int limit;
struct bufferevent *bev = &beva->bev.bev;
/* Don't write if there's a write in progress, or we do not
* want to write, or when there's nothing left to write. */
if (beva->write_in_progress || beva->bev.connecting)
return;
if (!beva->ok || !(bev->enabled&EV_WRITE) ||
!evbuffer_get_length(bev->output)) {
bev_async_del_write(beva);
return;
}
at_most = evbuffer_get_length(bev->output);
/* This is safe so long as bufferevent_get_write_max never returns
* more than INT_MAX. That's true for now. XXXX */
limit = (int)_bufferevent_get_write_max(&beva->bev);
if (at_most >= (size_t)limit && limit >= 0)
at_most = limit;
if (beva->bev.write_suspended) {
bev_async_del_write(beva);
return;
}
/* XXXX doesn't respect low-water mark very well. */
bufferevent_incref(bev);
if (evbuffer_launch_write(bev->output, at_most,
&beva->write_overlapped)) {
bufferevent_decref(bev);
beva->ok = 0;
_bufferevent_run_eventcb(bev, BEV_EVENT_ERROR);
} else {
beva->write_in_progress = at_most;
_bufferevent_decrement_write_buckets(&beva->bev, at_most);
bev_async_add_write(beva);
}
}
static int
be_async_disable(struct bufferevent *bev, short what)
{
struct bufferevent_async *bev_async = upcast(bev);
/* XXXX If we disable reading or writing, we may want to consider
* canceling any in-progress read or write operation, though it might
* not work. */
if (what & EV_READ) {
BEV_DEL_GENERIC_READ_TIMEOUT(bev);
bev_async_del_read(bev_async);
}
if (what & EV_WRITE) {
BEV_DEL_GENERIC_WRITE_TIMEOUT(bev);
bev_async_del_write(bev_async);
}
return 0;
}
static void
be_async_destruct(struct bufferevent *bev)
{
struct bufferevent_async *bev_async = upcast(bev);
struct bufferevent_private *bev_p = BEV_UPCAST(bev);
evutil_socket_t fd;
EVUTIL_ASSERT(!upcast(bev)->write_in_progress &&
!upcast(bev)->read_in_progress);
bev_async_del_read(bev_async);
bev_async_del_write(bev_async);
fd = evbuffer_overlapped_get_fd_(bev->input);
if (bev_p->options & BEV_OPT_CLOSE_ON_FREE) {
/* XXXX possible double-close */
ld_evutil_closesocket(fd);
}
}
static void
be_async_destruct(struct bufferevent *bev)
{
struct bufferevent_async *bev_async = upcast(bev);
struct bufferevent_private *bev_p = BEV_UPCAST(bev);
evutil_socket_t fd;
EVUTIL_ASSERT(!upcast(bev)->write_in_progress &&
!upcast(bev)->read_in_progress);
bev_async_del_read(bev_async);
bev_async_del_write(bev_async);
fd = evbuffer_overlapped_get_fd_(bev->input);
if (fd != (evutil_socket_t)INVALID_SOCKET &&
(bev_p->options & BEV_OPT_CLOSE_ON_FREE)) {
evutil_closesocket(fd);
evbuffer_overlapped_set_fd_(bev->input, INVALID_SOCKET);
}
}
static void
be_async_destruct(struct bufferevent *bev)
{
struct bufferevent_async *bev_async = upcast(bev);
struct bufferevent_private *bev_p = BEV_UPCAST(bev);
evutil_socket_t fd;
EVUTIL_ASSERT(!upcast(bev)->write_in_progress &&
!upcast(bev)->read_in_progress);
bev_async_del_read(bev_async);
bev_async_del_write(bev_async);
fd = _evbuffer_overlapped_get_fd(bev->input);
if (bev_p->options & BEV_OPT_CLOSE_ON_FREE) {
/* XXXX possible double-close */
evutil_closesocket(fd);
}
/* delete this in case non-blocking connect was used */
if (event_initialized(&bev->ev_write)) {
event_del(&bev->ev_write);
_bufferevent_del_generic_timeout_cbs(bev);
}
}