static int
_conn_poll_query(connectionObject *self)
{
int res = PSYCO_POLL_ERROR;
switch (self->async_status) {
case ASYNC_WRITE:
Dprintf("conn_poll: async_status = ASYNC_WRITE");
res = _conn_poll_advance_write(self);
break;
case ASYNC_READ:
Dprintf("conn_poll: async_status = ASYNC_READ");
res = _conn_poll_advance_read(self);
break;
case ASYNC_DONE:
Dprintf("conn_poll: async_status = ASYNC_DONE");
/* We haven't asked anything: just check for notifications. */
res = _conn_poll_advance_read(self);
break;
default:
Dprintf("conn_poll: in unexpected async status: %d",
self->async_status);
res = PSYCO_POLL_ERROR;
break;
}
return res;
}
static int
_conn_poll_query(connectionObject *self)
{
int res = PSYCO_POLL_ERROR;
switch (self->async_status) {
case ASYNC_WRITE:
Dprintf("conn_poll: async_status = ASYNC_WRITE");
res = _conn_poll_advance_write(self, PQflush(self->pgconn));
break;
case ASYNC_READ:
Dprintf("conn_poll: async_status = ASYNC_READ");
if (self->async) {
res = _conn_poll_advance_read(self, pq_is_busy(self));
}
else {
/* we are a green connection being polled as result of a query.
this means that our caller has the lock and we are being called
from the callback. If we tried to acquire the lock now it would
be a deadlock. */
res = _conn_poll_advance_read(self, pq_is_busy_locked(self));
}
break;
case ASYNC_DONE:
Dprintf("conn_poll: async_status = ASYNC_DONE");
/* We haven't asked anything: just check for notifications. */
res = _conn_poll_advance_read(self, pq_is_busy(self));
break;
default:
Dprintf("conn_poll: in unexpected async status: %d",
self->async_status);
res = PSYCO_POLL_ERROR;
break;
}
return res;
}
