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#include <gran/mesh/node3d.h>
struct reg {
struct packet pkt;
bool busy;
};
struct node3d {
struct component component;
uint8_t x, y, z;
uint64_t timestamp;
struct component *n, *s, *e, *w, *u, *d, *l;
struct reg n_in, s_in, e_in, w_in, u_in, d_in, l_in;
};
enum order {
N, S, E, W, U, D, L
};
static inline void maybe_pick(struct reg *output[7], enum order d, struct reg *r)
{
if (output[d] && output[d]->pkt.timestamp < r->pkt.timestamp)
return;
output[d] = r;
}
static stat node3d_clock(struct node3d *node3d)
{
node3d->timestamp++;
struct reg *output[7] = {NULL, NULL, NULL, NULL, NULL, NULL, NULL};
struct reg *input[7] = {
&node3d->n_in,
&node3d->s_in,
&node3d->e_in,
&node3d->w_in,
&node3d->u_in,
&node3d->d_in,
&node3d->l_in
};
uint8_t X = node3d->x, Y = node3d->y, Z = node3d->z;
for (size_t i = 0; i < 7; ++i) {
struct reg *r = input[i];
if (!r->busy)
continue;
uint8_t x, y, z;
addr_mesh3d(r->pkt.to, &x, &y, &z, NULL);
if (x < X) {
maybe_pick(output, W, r);
continue;
}
if (x > X) {
maybe_pick(output, E, r);
continue;
}
if (y < Y) {
maybe_pick(output, S, r);
continue;
}
if (y > Y) {
maybe_pick(output, N, r);
continue;
}
if (z < Z) {
maybe_pick(output, D, r);
continue;
}
if (z > Z) {
maybe_pick(output, U, r);
continue;
}
maybe_pick(output, L, r);
}
struct component *target[7] = {
node3d->n,
node3d->s,
node3d->e,
node3d->w,
node3d->u,
node3d->d,
node3d->l
};
for (size_t i = 0; i < 7; ++i) {
if (!output[i])
continue;
if (!target[i]) {
/* for now, should send packet back with an error or something */
abort();
}
stat ret = SEND(node3d, target[i], output[i]->pkt);
if (ret == EBUSY)
continue;
assert(ret == OK);
output[i]->busy = false;
}
return OK;
}
static stat reg_receive(struct reg *r, struct packet pkt)
{
if (r->busy)
return EBUSY;
r->pkt = pkt;
r->busy = true;
return OK;
}
static stat node3d_receive(struct node3d *node3d, struct component *from, struct packet pkt)
{
if (from == node3d->l) {
/* add time when packet entered network */
pkt.timestamp = node3d->timestamp;
return reg_receive(&node3d->l_in, pkt);
}
if (from == node3d->n)
return reg_receive(&node3d->n_in, pkt);
if (from == node3d->s)
return reg_receive(&node3d->s_in, pkt);
if (from == node3d->e)
return reg_receive(&node3d->e_in, pkt);
if (from == node3d->w)
return reg_receive(&node3d->w_in, pkt);
if (from == node3d->u)
return reg_receive(&node3d->u_in, pkt);
if (from == node3d->d)
return reg_receive(&node3d->d_in, pkt);
abort();
return OK;
}
struct component *create_mesh_node3d(uint8_t x, uint8_t y, uint8_t z)
{
struct node3d *node = calloc(1, sizeof(struct node3d));
if (!node)
return NULL;
node->component.receive = (receive_callback)node3d_receive;
node->component.clock = (clock_callback)node3d_clock;
node->x = x;
node->y = y;
node->z = z;
return (struct component *)node;
}
stat mesh_node3d_connect(struct component *node,
struct component *n,
struct component *s,
struct component *e,
struct component *w,
struct component *u,
struct component *d,
struct component *l)
{
struct node3d *node3d = (struct node3d *)node;
node3d->n = n;
node3d->s = s;
node3d->e = e;
node3d->w = w;
node3d->u = u;
node3d->d = d;
node3d->l = l;
return OK;
}
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