Function moduleGetCommandKeysViaAPI

app/redis-6.2.6/src/module.c:723–741

This function returns the list of keys, with the same interface as the * 'getkeys' function of the native commands, for module commands that exported * the "getkeys-api" flag during the registration. This is done when the * list of keys are not at fixed positions, so that first/last/step cannot * be used. * * In order to accomplish its work, the module command is called, flagging * the cont

 * the context in a way that the command can recognize this is a special
 * "get keys" call by calling RedisModule_IsKeysPositionRequest(ctx). */
int moduleGetCommandKeysViaAPI(struct redisCommand *cmd, robj **argv, int argc, getKeysResult *result) {
    RedisModuleCommandProxy *cp = (void*)(unsigned long)cmd->getkeys_proc;
    RedisModuleCtx ctx = REDISMODULE_CTX_INIT;

    ctx.module = cp->module;
    ctx.client = NULL;
    ctx.flags |= REDISMODULE_CTX_KEYS_POS_REQUEST;

    /* Initialize getKeysResult */
    getKeysPrepareResult(result, MAX_KEYS_BUFFER);
    ctx.keys_result = result;

    cp->func(&ctx,(void**)argv,argc);
    /* We currently always use the array allocated by RM_KeyAtPos() and don't try
     * to optimize for the pre-allocated buffer.
     */
    moduleFreeContext(&ctx);
    return result->numkeys;
}

/* --------------------------------------------------------------------------
 * ## Commands API