/* Change an identity landing into a garbage landing. */
void SNetBecomeGarbage(landing_t *land)
{
/* One static node for all garbage landings. */
static node_t garbage_node = {
NODE_garbage, SNetNodeGarbage, SNetStopGarbage, SNetTermGarbage
};
landing_identity_t *ident = LAND_SPEC(land, identity);
snet_stream_desc_t *desc = ident->outdesc;
/* Only identity landings can become a garbage landing. */
assert(land->type == LAND_identity);
if (SNetDebug()) {
printf("%s: node %s land %s (prev %s)\n",
__func__, SNetNodeName(land->node), SNetLandingName(land),
SNetLandingTypeName(ident->prev_type));
}
/* Init new state to ``garbage'' */
land->type = LAND_garbage;
land->node = &garbage_node;
/* Guarantee that destination stream persists until termination. */
DESC_INCR(desc);
LAND_INCR(desc->landing);
assert(desc == LAND_SPEC(land, siso)->outdesc);
}
/* Change a landing into an identity landing. */
void SNetBecomeIdentity(landing_t *land, snet_stream_desc_t *out)
{
/* One static node for all identities. */
static node_t identity_node = {
NODE_identity, SNetNodeIdentity, SNetStopIdentity, SNetTermIdentity
};
landing_type_t prev_type = land->type;
if (SNetDebugGC()) {
printf("%s: node %s land %s\n",
__func__, SNetNodeName(land->node), SNetLandingName(land));
}
/* Destroy old resources */
SNetCleanupLanding(land);
/* Init new state */
land->type = LAND_identity;
land->node = &identity_node;
LAND_SPEC(land, identity)->outdesc = out;
LAND_SPEC(land, identity)->prev_type = prev_type;
assert(land->refs > 0);
}
