int onDataAvailable(long bytes = -1); : Electronic Team, Inc

int onDataAvailable(long bytes = -1); Print

Created by: Emilia Rudd

Modified on: Wed, 27 Jul, 2022 at 5:23 PM

Call onDataAvailable when there are incoming data available on socket opened via connect() or in another way (QLocalSocket, etc.).

Parameters:

bytes - number of bytes available to read from socket, -1 if the number of bytes is unknown

Return:

errno error code:

* EINVAL if EveusbEventHandler was not set via setEventHandler or in case of some other errors

* E2BIG if message from daemon exceeds MSG_LEN_MAX bytes

* EIO if underlying call to readFromDaemon() returned -1

* ENODATA if readFromDaemon() returned zero (connection was closed by remote side)

Note:

See poll/select, QLocalSocket::onDataAvailable, etc.

Remarks:

To perform read on socket, it calls EveusbEventHandler::readFromDaemon().

If a complete message is received from daemon, it calls onMessage() and corresponding member of EveusbEventHandler.

You should close the socket if an error is returned.

Emilia is the author of this solution article.

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int onDataAvailable(long bytes = -1); Print