Function HelloKeys_RedisCommand

app/redis-6.2.6/src/modules/helloblock.c:181–200

HELLO.KEYS -- Return all the keys in the current database without blocking * the server. The keys do not represent a point-in-time state so only the keys * that were in the database from the start to the end are guaranteed to be * there. */

 * that were in the database from the start to the end are guaranteed to be
 * there. */
int HelloKeys_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
    REDISMODULE_NOT_USED(argv);
    if (argc != 1) return RedisModule_WrongArity(ctx);

    pthread_t tid;

    /* Note that when blocking the client we do not set any callback: no
     * timeout is possible since we passed '0', nor we need a reply callback
     * because we'll use the thread safe context to accumulate a reply. */
    RedisModuleBlockedClient *bc = RedisModule_BlockClient(ctx,NULL,NULL,NULL,0);

    /* Now that we setup a blocking client, we need to pass the control
     * to the thread. However we need to pass arguments to the thread:
     * the reference to the blocked client handle. */
    if (pthread_create(&tid,NULL,HelloKeys_ThreadMain,bc) != 0) {
        RedisModule_AbortBlock(bc);
        return RedisModule_ReplyWithError(ctx,"-ERR Can't start thread");
    }
    return REDISMODULE_OK;
}

/* This function must be present on each Redis module. It is used in order to
 * register the commands into the Redis server. */