Function CheckCaches

src/cachecheck.cpp:36–226

* Check the validity of some of the caches. * Especially in the sense of desyncs between * the cached value and what the value would * be when calculated from the 'base' data. */

 * be when calculated from the 'base' data.
 */
void CheckCaches()
{
	/* Return here so it is easy to add checks that are run
	 * always to aid testing of caches. */
	if (_debug_desync_level <= 1) return;

	/* Check the town caches. */
	std::vector<TownCache> old_town_caches;
	for (const Town *t : Town::Iterate()) {
		old_town_caches.push_back(t->cache);
	}

	RebuildTownCaches();
	RebuildSubsidisedSourceAndDestinationCache();

	uint i = 0;
	for (Town *t : Town::Iterate()) {
		if (old_town_caches[i] != t->cache) {
			Debug(desync, 2, "warning: town cache mismatch: town {}", t->index);
		}
		i++;
	}

	/* Check company infrastructure cache. */
	std::vector<CompanyInfrastructure> old_infrastructure;
	for (const Company *c : Company::Iterate()) old_infrastructure.push_back(c->infrastructure);

	AfterLoadCompanyStats();

	i = 0;
	for (const Company *c : Company::Iterate()) {
		if (old_infrastructure[i] != c->infrastructure) {
			Debug(desync, 2, "warning: infrastructure cache mismatch: company {}", c->index);
		}
		i++;
	}

	/* Strict checking of the road stop cache entries */
	for (const RoadStop *rs : RoadStop::Iterate()) {
		if (IsBayRoadStopTile(rs->xy)) continue;

		rs->GetEntry(DIAGDIR_NE).CheckIntegrity(rs);
		rs->GetEntry(DIAGDIR_NW).CheckIntegrity(rs);
	}

	std::vector<NewGRFCache> grf_cache;
	std::vector<VehicleCache> veh_cache;
	std::vector<GroundVehicleCache> gro_cache;
	std::vector<TrainCache> tra_cache;

	for (Vehicle *v : Vehicle::Iterate()) {
		if (v != v->First() || v->vehstatus.Test(VehState::Crashed) || !v->IsPrimaryVehicle()) continue;

		for (const Vehicle *u = v; u != nullptr; u = u->Next()) {
			FillNewGRFVehicleCache(u);
			grf_cache.emplace_back(u->grf_cache);
			veh_cache.emplace_back(u->vcache);
			switch (u->type) {