pok_ret_t pok_blackboard_read (const pok_blackboard_id_t id,
const uint64_t timeout,
void* data,
pok_port_size_t* len)
{
(void) timeout;
if (id > POK_CONFIG_NB_BLACKBOARDS)
{
return POK_ERRNO_EINVAL;
}
if (data == NULL)
{
return POK_ERRNO_EINVAL;
}
if (pok_blackboards[id].ready != TRUE)
{
return POK_ERRNO_EINVAL;
}
/* FIXME : Protect with mutexes when empty, ... */
/* See what is the condition to use the timeout */
pok_event_lock (pok_blackboards[id].lock);
memcpy (data, &pok_blackboards_data[pok_blackboards[id].index], pok_blackboards[id].size);
pok_event_unlock (pok_blackboards[id].lock);
/* FIXME : return right size */
*len = pok_blackboards[id].size;
return POK_ERRNO_OK;
}
pok_ret_t pok_buffer_create (char* name,
const pok_range_t max_nb_messages,
const pok_port_size_t max_msg_size,
const pok_queueing_discipline_t discipline,
pok_buffer_id_t* id)
{
uint8_t n;
pok_ret_t ret;
if (first_time)
{
pok_buffer_init();
first_time = FALSE;
}
for (n=0 ; n < POK_CONFIG_NB_BUFFERS ; n++)
{
if (streq (name, pok_buffers_names[n]))
{
if (pok_buffers[n].ready == TRUE)
{
return POK_ERRNO_READY;
}
#ifdef POK_NEEDS_SCHED_O1_SPLIT
ret = pok_event_create (&pok_buffers[n].not_full);
if (ret != POK_ERRNO_OK)
{
printf ("\tpok_buffer_create: Err in 'pok_event_create' for not_full event\n");
return ret;
}
ret = pok_event_create (&pok_buffers[n].not_empty);
if (ret != POK_ERRNO_OK)
{
printf ("\tpok_buffer_create: Err in 'pok_event_create' for not_empty event\n");
return ret;
}
/* the not-empty has to be set DOWN because a new buffer is empy */
pok_event_lock(pok_buffers[n].not_empty);
#else
ret = pok_event_create (&pok_buffers[n].lock);
if (ret != POK_ERRNO_OK)
{
// printf ("\tpok_buffer_create: Err in 'pok_event_create'\n");
return ret;
}
#endif
pok_buffers[n].index = pok_buffers_data_index;
pok_buffers[n].ready = TRUE;
pok_buffers[n].empty = TRUE;
pok_buffers[n].size = max_nb_messages * max_msg_size;
pok_buffers[n].first_size = -1;
pok_buffers[n].off_e = 0;
pok_buffers[n].off_b = 0;
pok_buffers[n].discipline = discipline;
pok_buffers_data_index = pok_buffers_data_index + pok_buffers[n].size;
pok_buffers[n].status.nb_messages = 0;
pok_buffers[n].status.max_messages = max_nb_messages;
pok_buffers[n].status.max_message_size = max_msg_size;
pok_buffers[n].status.waiting_processes = 0;
*id = n;
return POK_ERRNO_OK;
}
}
printf ("\tpok_buffer_create: Name mismatch\n");
return POK_ERRNO_EINVAL;
}
