static void *pnet_rx_thread_hnd(void *args) {
struct pnet_wait_unit *unit = (struct pnet_wait_unit *) args;
struct pnet_pack *pack;
while (1) {
if (unit->buff.cnt == 0) {
EVENT_WAIT(&unit->event, unit->buff.cnt, EVENT_TIMEOUT_INFINITE);
continue;
}
ring_buff_dequeue(&unit->buff, &pack, 1);
pnet_process(pack);
}
return NULL;
}
static ssize_t pipe_read(struct idesc *idesc, void *buf, size_t nbyte) {
struct pipe *pipe;
ssize_t res;
assert(buf);
assert(idesc);
assert(idesc->idesc_ops == &idesc_pipe_ops);
assert(idesc->idesc_amode == FS_MAY_READ);
if (!nbyte) {
return 0;
}
pipe = idesc_to_pipe(idesc);
mutex_lock(&pipe->mutex);
do {
res = ring_buff_dequeue(pipe->buff, buf, nbyte);
if (idesc_pipe_isclosed(&pipe->write_desc)) {
/* Nothing to do, what's read, that's read */
break;
}
if (res > 0) {
/* Smth read, notify write end (can't be closed,
* checked already) */
idesc_notify(&pipe->write_desc.idesc, POLLOUT);
break;
}
res = pipe_wait(idesc, pipe, POLLIN | POLLERR);
} while (res == 0);
mutex_unlock(&pipe->mutex);
return res;
}
