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#include <gran/common.h>
stat place_reg(struct reg *r, struct packet pkt)
{
if (r->busy)
return EBUSY;
r->pkt = pkt;
r->busy = true;
return OK;
}
stat copy_reg(struct reg *r, struct reg *s)
{
assert(s->busy);
if (r->busy)
return EBUSY;
r->pkt = s->pkt;
r->busy = true;
s->busy = false;
return OK;
}
void propagate(struct reg *out,
size_t count, struct reg *in[static count],
bool (*sel)(struct reg *r, void *data), void *data)
{
struct reg *r = NULL;
for (size_t i = 0; i < count; ++i) {
if (!in[i] || !in[i]->busy)
continue;
if (!sel(in[i], data))
continue;
if (!r || r->pkt.timestamp > in[i]->pkt.timestamp)
r = in[i];
}
if (!r)
return;
copy_reg(out, r);
}
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