MPPparms Struct Reference

#include <AppleTalk.h>

Data Fields
QElem *	qLink
short	qType
short	ioTrap
Ptr	ioCmdAddr
ATPCompletionUPP	ioCompletion
OSErr	ioResult
long	userData
short	reqTID
short	ioRefNum
short	csCode

Detailed Description

MPPProtocolHandlerProcs and DDPSocketListenerProcs cannot be written in or called from a high-level language without the help of mixed mode or assembly glue because they use the following parameter-passing conventions:

typedef Boolean (*MPPProtocolHandlerProcPtr)(Ptr SCCAddr1, Ptr SCCAddr2, Ptr MPPLocalVars, Ptr nextFreeByteInRHA, Ptr ReadPacketAndReadRestPtr, short numBytesLeftToReadInPacket);

 In:
     =>  SCCAddr1                    A0.L
     =>  SCCAddr2                    A1.L
     =>  MPPLocalVars                A2.L
     =>  nextFreeByteInRHA           A3.L
     =>  ReadPacketAndReadRestPtr    A4.L
     =>  numBytesLeftToReadInPacket  D1.W
 Out:
     <=  Boolean                     Z bit of CCR

typedef Boolean (*DDPSocketListenerProcPtr)(Ptr SCCAddr1, Ptr SCCAddr2, Ptr MPPLocalVars, Ptr nextFreeByteInRHA, Ptr ReadPacketAndReadRestPtr, UInt8 packetDestinationNumber, short numBytesLeftToReadInPacket);

 In:
     =>  SCCAddr1                    A0.L
     =>  SCCAddr2                    A1.L
     =>  MPPLocalVars                A2.L
     =>  nextFreeByteInRHA           A3.L
     =>  ReadPacketAndReadRestPtr    A4.L
     =>  packetDestinationNumber     D0.B
     =>  numBytesLeftToReadInPacket  D1.W
 Out:
     <=  Boolean                     Z bit of CCR

Field Documentation

csCode

short MPPparms::csCode

driver reference number

ioCmdAddr

Ptr MPPparms::ioCmdAddr

routine trap

ioCompletion

ATPCompletionUPP MPPparms::ioCompletion

routine address

ioRefNum

short MPPparms::ioRefNum

request transaction ID

ioResult

OSErr MPPparms::ioResult

ATPCompletionUPP or MPPCompletionUPP

ioTrap

short MPPparms::ioTrap

queue type

qType

short MPPparms::qType

next queue entry

reqTID

short MPPparms::reqTID

Command result (ATP user bytes)

userData

long MPPparms::userData

result code

---

The documentation for this struct was generated from the following file:

• AppleTalk.h