Function propagateExpire

src/db.cpp:1966–1986

Propagate expires into slaves and the AOF file. * When a key expires in the master, a DEL operation for this key is sent * to all the slaves and the AOF file if enabled. * * This way the key expiry is centralized in one place, and since both * AOF and the master->replica link guarantee operation ordering, everything * will be consistent even if we allow write operations against expiring * k

 * will be consistent even if we allow write operations against expiring
 * keys. */
void propagateExpire(redisDb *db, robj *key, int lazy) {
    serverAssert(GlobalLocksAcquired());

    robj *argv[2];

    argv[0] = lazy ? shared.unlink : shared.del;
    argv[1] = key;
    incrRefCount(argv[0]);
    incrRefCount(argv[1]);

    /* If the master decided to expire a key we must propagate it to replicas no matter what..
     * Even if module executed a command without asking for propagation. */
    int prev_replication_allowed = g_pserver->replication_allowed;
    g_pserver->replication_allowed = 1;
    if (!g_pserver->fActiveReplica) // Active replicas do their own expiries, do not propogate
        propagate(cserver.delCommand,db->id,argv,2,PROPAGATE_AOF|PROPAGATE_REPL);
    g_pserver->replication_allowed = prev_replication_allowed;

    decrRefCount(argv[0]);
    decrRefCount(argv[1]);
}

void propagateSubkeyExpire(redisDb *db, int type, robj *key, robj *subkey)
{