Allows to specify which type of operation should be implemented while calling to Vortex Library internal IO blocking abstraction.
A read watching operation is requested.
If this value is received, the fd set containins a set of socket descriptors which should be watched for incoming data to be received.
A write watching operation is requested.
If this value is received, the fd set contains a set of socket that is being requested for its availability to perform a write operation on them.