Default constructor.

Derived classes can implement a NewL() function if they require two-phase construction.

Destructor.

Reserved virtual function.

Allocate a CLibrary unloader

Specifies the protocol for getting the information about the serial protocol.

Implementations should fill in the TSerialInfo structure to reflect the protocol's capabilities.

Get the module name from the libary reference

Specifies the protocol for creating a new serial port for the protocol. The comms server calls this function in response to a RComm:Open() call.

Typically, the implementation would call NewL() on the protocol's CPort-based class. Any resources required by the new port object should be done at this stage. If the serial port object cannot be created for any reason, NewPortL() should leave with an appropriate error code.

The interpretation of unit numbers is specific to the particular serial protocol module. However, unit numbers on Symbian OS should be zero-based. For the default built-in serial ports implemented by the serial protocol module ecuart.csy, the unit numbers refer to the hardware ports, with 0 being the first port on the machine. If a second request is made to create a port with a unit number that has already been created and not destroyed, NewPortL() should leave with KErrAlreadyExists.

Retrieve the security policy for a requested port. This base implementation sets the default policy to be an 'AlwaysFail' policy.

Specifies the protocol for checking the supplied TVersion against the protocol's module version.

The default implementation calls User::QueryVersionSupported() to perform the check against the object's iVersion member.

Module version number. The class should initialise this member with its version number from its constructor.