static int
be_async_enable(struct bufferevent *buf, short what)
{
struct bufferevent_async *bev_async = upcast(buf);
if (!bev_async->ok)
return -1;
if (bev_async->bev.connecting) {
/* Don't launch anything during connection attempts. */
return 0;
}
if (what & EV_READ)
BEV_RESET_GENERIC_READ_TIMEOUT(buf);
if (what & EV_WRITE)
BEV_RESET_GENERIC_WRITE_TIMEOUT(buf);
/* If we newly enable reading or writing, and we aren't reading or
writing already, consider launching a new read or write. */
if (what & EV_READ)
bev_async_consider_reading(bev_async);
if (what & EV_WRITE)
bev_async_consider_writing(bev_async);
return 0;
}
static void
read_complete(struct event_overlapped *eo, ev_uintptr_t key,
ev_ssize_t nbytes, int ok)
{
struct bufferevent_async *bev_a = upcast_read(eo);
struct bufferevent *bev = &bev_a->bev.bev;
short what = BEV_EVENT_READING;
_bufferevent_incref_and_lock(bev);
EVUTIL_ASSERT(bev_a->ok && bev_a->read_in_progress);
evbuffer_commit_read(bev->input, nbytes);
bev_a->read_in_progress = 0;
if (ok && nbytes) {
BEV_RESET_GENERIC_READ_TIMEOUT(bev);
_bufferevent_decrement_read_buckets(&bev_a->bev, nbytes);
if (evbuffer_get_length(bev->input) >= bev->wm_read.low)
_bufferevent_run_readcb(bev);
bev_async_consider_reading(bev_a);
} else if (!ok) {
what |= BEV_EVENT_ERROR;
bev_a->ok = 0;
_bufferevent_run_eventcb(bev, what);
} else if (!nbytes) {
what |= BEV_EVENT_EOF;
bev_a->ok = 0;
_bufferevent_run_eventcb(bev, what);
}
_bufferevent_decref_and_unlock(bev);
}
static void
be_async_inbuf_callback(struct evbuffer *buf,
const struct evbuffer_cb_info *cbinfo,
void *arg)
{
struct bufferevent *bev = arg;
struct bufferevent_async *bev_async = upcast(bev);
/* If we successfully read into the inbuf, or we drained data from
* the inbuf and were not reading before, we may want to read now */
_bufferevent_incref_and_lock(bev);
if (cbinfo->n_added) {
/* XXXX can't detect 0-length read completion */
bev_async->read_in_progress = 0;
}
if (cbinfo->n_added || cbinfo->n_deleted)
bev_async_consider_reading(bev_async);
if (cbinfo->n_added) {
BEV_RESET_GENERIC_READ_TIMEOUT(bev);
if (evbuffer_get_length(bev->input) >= bev->wm_read.low &&
bev->readcb != NULL)
_bufferevent_run_readcb(bev);
}
_bufferevent_decref_and_unlock(bev);
}
static void
read_complete(struct event_overlapped *eo, ev_uintptr_t key,
ev_ssize_t nbytes, int ok)
{
struct bufferevent_async *bev_a = upcast_read(eo);
struct bufferevent *bev = &bev_a->bev.bev;
short what = BEV_EVENT_READING;
ev_ssize_t amount_unread;
BEV_LOCK(bev);
EVUTIL_ASSERT(bev_a->read_in_progress);
amount_unread = bev_a->read_in_progress - nbytes;
evbuffer_commit_read_(bev->input, nbytes);
bev_a->read_in_progress = 0;
if (amount_unread)
bufferevent_decrement_read_buckets_(&bev_a->bev, -amount_unread);
if (!ok)
bev_async_set_wsa_error(bev, eo);
if (bev_a->ok) {
if (ok && nbytes) {
BEV_RESET_GENERIC_READ_TIMEOUT(bev);
if (evbuffer_get_length(bev->input) >= bev->wm_read.low)
bufferevent_run_readcb_(bev);
bev_async_consider_reading(bev_a);
} else if (!ok) {
what |= BEV_EVENT_ERROR;
bev_a->ok = 0;
bufferevent_run_eventcb_(bev, what);
} else if (!nbytes) {
what |= BEV_EVENT_EOF;
bev_a->ok = 0;
bufferevent_run_eventcb_(bev, what);
}
}
bufferevent_decref_and_unlock_(bev);
}
static int
be_async_enable(struct bufferevent *buf, short what)
{
struct bufferevent_async *bev_async = upcast(buf);
if (!bev_async->ok)
return -1;
/* NOTE: This interferes with non-blocking connect */
if (what & EV_READ)
BEV_RESET_GENERIC_READ_TIMEOUT(buf);
if (what & EV_WRITE)
BEV_RESET_GENERIC_WRITE_TIMEOUT(buf);
/* If we newly enable reading or writing, and we aren't reading or
writing already, consider launching a new read or write. */
if (what & EV_READ)
bev_async_consider_reading(bev_async);
if (what & EV_WRITE)
bev_async_consider_writing(bev_async);
return 0;
}