static inline void fp_rem_thd(struct sched_thd *t)
{
u16_t p = sched_get_metric(t)->priority;
/* if on a list _and_ no other thread at this priority? */
if (!EMPTY_LIST(t, prio_next, prio_prev) &&
t->prio_next == t->prio_prev) {
mask_unset(p);
}
REM_LIST(t, prio_next, prio_prev);
}
void *pool_malloc(mem_pool *pool) {
uint8_t i;
for(i = 0; i < pool->num_elems; ++i) {
if(mask_query(pool->free_vec, i)) {
mask_unset(pool->free_vec, i);
return (pool->pool + (i * pool->type_size));
}
}
return NULL;
}
static uint8_t dvdrp_mesg_send(dvdrp_mesg_pkt *dvdrp_ptr, comBuf *pkt) {
node_id_t cur_next_hop = 0; //to make build clean
uint32_t /*global,*/ local_bv;
uint8_t global;
uint8_t i, ret;
// Add the proto ID to the end of the packet.
pkt->data[pkt->size++] = DVDRP_PROTO_ID;
// This is a rather rough function to write without dynamicly
// sized DSs, so here it is unoptimized:
// 1) create a global bit vector marked with matching routes
// 2) take the first marked route and record it's next_hop
// 3) unmark that route from the global bv ---\ !!
// 4) mark in the local bv ---/ now rolled into step 5!
// 5) iterate through the rest of the marked routes
// a) if next_hop is the same, repeat 3 & 4 for route
// 6) local bv is packets bvs; assign and send out
// 7) goto 2
//
// This strategy, while slow, saves on the need for larger arrays
// or other memory hungary data structures. We can pay for
// smaller memory size with a little bit of energy.
//
// Note: I've looked at the asm for this function and it's horrid.
// avr-libc's 32-bit number support isn't poor, but rather I
// didn't realize what an impact emulating 32-bit operations would
// have. This function will need to get a serious facelift soon.
// If the use of global can be reduced by doing inline marking in
// the route table, or some other method, it'll be a major victory
// toward reducing the size.
// 1)
global = 0;
ret = FALSE;
for(i = 0; i < DVDRP_RT_MAX_PREDICATES; ++i) {
if(route_tbl[i].receiver_id != DVDRP_INVALID_NODE_ID
&&
mask_query(dvdrp_ptr->split_bv, route_tbl[i].bv_pos))
{
// printf(".r;%d:%C", route_tbl[i].receiver_id, route_tbl[i].bv_pos);
mask_set(global, i);
}
}
// 2)
while(1) {
for(i = 0; i < DVDRP_RT_MAX_PREDICATES; ++i) {
if(mask_query(global, i)) {
cur_next_hop = route_tbl[i].paths[0].next_hop;
break;
}
}
if(i == DVDRP_RT_MAX_PREDICATES) {
// printf(".outp");
break;
}
// 5)
local_bv = 0;
for(i = 0; i < DVDRP_RT_MAX_PREDICATES; ++i) {
// 5a)
if(mask_query(global, i) &&
cur_next_hop == route_tbl[i].paths[0].next_hop)
{
// 5a - 3)
mask_unset(global, i);
// 5a - 4)
mask_set(local_bv, route_tbl[i].bv_pos);
}
}
//check for local delivery
if(cur_next_hop == node_id) {
ret = TRUE;
// printf(".mf;l");
} else {
dvdrp_ptr->immed_dest = cur_next_hop;
dvdrp_ptr->split_bv = local_bv;
// printf(".mf;%d", dvdrp_ptr->immed_dest);
com_send(IFACE_RADIO, pkt);
//mos_led_toggle(1);
}
}
// printf(".pts;%d\n", mos_check_stack(mos_thread_current()));
return ret;
}
int str_to_mask (Mask *mask, const char *orig, char **rejects)
{
char *ptr,
*rest;
int len,
i,
neg;
int warn = 0;
char * str;
size_t cluep = 0;
mask_unsetall(mask);
if (!orig)
return 0; /* Whatever */
if (rejects == NULL || *rejects != NULL)
panic(1, "str_to_mask: rejects must be a pointer to null");
str = LOCAL_COPY(orig);
while ((str = next_arg(str, &rest)) != NULL)
{
while (str)
{
if ((ptr = strchr(str, ',')) != NULL)
*ptr++ = 0;
if ((len = strlen(str)) != 0)
{
if (my_strnicmp(str, "ALL", len) == 0)
mask_setall(mask);
else if (my_strnicmp(str, "NONE", len) == 0)
mask_unsetall(mask);
else
{
if (*str == '-')
{
str++, len--;
neg = 1;
}
else
neg = 0;
for (i = 0; i < level_bucket->numitems; i++)
{
if (!my_strnicmp(str, LEVELNAME(i), len))
{
if (neg)
mask_unset(mask, LEVELNUM(i));
else
mask_set(mask, LEVELNUM(i));
break;
}
}
if (i == level_bucket->numitems)
malloc_strcat_word_c(rejects, space, str,
DWORD_NO, &cluep);
}
}
str = ptr;
}
str = rest;
}
if (rejects && *rejects)
return -1;
return 0;
}