void tube_handle_signal(int ATTR_UNUSED(fd), short ATTR_UNUSED(events),
void* arg)
{
struct tube* tube = (struct tube*)arg;
uint8_t* buf;
uint32_t len = 0;
verbose(VERB_ALGO, "tube handle_signal");
while(tube_poll(tube)) {
if(tube_read_msg(tube, &buf, &len, 1)) {
fptr_ok(fptr_whitelist_tube_listen(tube->listen_cb));
(*tube->listen_cb)(tube, buf, len, NETEVENT_NOERROR,
tube->listen_arg);
}
}
}
int tube_read_msg(struct tube* tube, uint8_t** buf, uint32_t* len,
int nonblock)
{
struct tube_res_list* item = NULL;
verbose(VERB_ALGO, "tube read_msg %s", nonblock?"nonblock":"blocking");
*buf = NULL;
if(!tube_poll(tube)) {
verbose(VERB_ALGO, "tube read_msg nodata");
/* nothing ready right now, wait if we want to */
if(nonblock)
return -1; /* would block waiting for items */
if(!tube_wait(tube))
return 0;
}
lock_basic_lock(&tube->res_lock);
if(tube->res_list) {
item = tube->res_list;
tube->res_list = item->next;
if(tube->res_last == item) {
/* the list is now empty */
tube->res_last = NULL;
verbose(VERB_ALGO, "tube read_msg lastdata");
if(!WSAResetEvent(tube->event)) {
log_err("WSAResetEvent: %s",
wsa_strerror(WSAGetLastError()));
}
}
}
lock_basic_unlock(&tube->res_lock);
if(!item)
return 0; /* would block waiting for items */
*buf = item->buf;
*len = item->len;
free(item);
verbose(VERB_ALGO, "tube read_msg len %d", (int)*len);
return 1;
}
int
ub_poll(struct ub_ctx* ctx)
{
/* no need to hold lock while testing for readability. */
return tube_poll(ctx->rr_pipe);
}