DIRECTORY
Camelot,
IO USING [int, PutFR, PutFR1],
Mach,
Rope USING [Cat, Fetch, Length, ROPE];

CamelotImpl: CEDAR PROGRAM
IMPORTS IO, Mach, Rope
EXPORTS Camelot
~ BEGIN
OPEN Camelot, Mach;

DSInitialize: PUBLIC PROC [dsPort: portT, raiseSignal: BOOL] RETURNS [serverID: serverIdT, tsPort, mPort, sPort: portT, sharedMemAddr: vmAddressT, seqDescList: ListOfSegmentDesc _ NIL, seqPortList: ListOfPorts, kernCode: Mach.kernReturnT _ -1] ~ TRUSTED {
innerDSInitialize: PROC [idsPort: portT, iserverID: POINTER TO serverIdT, itsPort, imPort, isPort: POINTER TO portT, isharedMemAddr: POINTER TO vmAddressT, iseqDescList: POINTER TO segmentDescListT, isegDescListCnt: POINTER TO INT, iseqPortList: POINTER TO portArrayT, isegPortListCnt: POINTER TO INT] RETURNS [kernReturnT]~ TRUSTED MACHINE CODE {
"<ds.h>.DS_Initialize"
};
ZsegDescList, DsegDescList: segmentDescListT _ NIL;
ZsegDescListCnt: INT _ -1;
ZsegPortList, DsegPortList: portArrayT _ NIL;
ZsegPortListCnt: INT _ -1;
initCode: INT _ SendErrorsStart;
initCode _ innerDSInitialize[dsPort, @serverID, @tsPort, @mPort, @sPort, @sharedMemAddr, @ZsegDescList, @ZsegDescListCnt, @ZsegPortList, @ZsegPortListCnt];
IF raiseSignal AND initCode # KernSuccess THEN SIGNAL MachCall[initCode, Rope.Cat["DS_Initialize failed; code = ", IO.PutFR1["%g", IO.int[initCode]]]];
IF ZsegDescListCnt # ZsegPortListCnt AND raiseSignal THEN SIGNAL MachCall[-1, IO.PutFR["DS_Initialize failed; different number of segments and ports = %g segments and %g ports", IO.int[ZsegDescListCnt], IO.int[ZsegPortListCnt]]];
IF ZsegDescListCnt > 0 THEN TRUSTED {
newItem: PROC RETURNS [lsd: ListOfSegmentDesc] ~ TRUSTED {
lsd _ LIST[[ZsegDescList.serverId, ZsegDescList.segmentId, ZsegDescList.logicalDisk, ZsegDescList.unused, ZsegDescList.highSize, ZsegDescList.lowSize]];
ZsegDescList _ ZsegDescList + UNITS[segmentDescT];
};
DsegDescList _ ZsegDescList;
seqDescList _ newItem[];
IF ZsegDescListCnt > 1 THEN {
lastItem: ListOfSegmentDesc _ seqDescList;
FOR item: INT IN [1..ZsegDescListCnt) DO
lastItem.rest _ newItem[];
lastItem _ lastItem.rest;
ENDLOOP;
};
[] _ vmDeallocate[targetTask: taskSelf[], address: LOOPHOLE[DsegDescList], size: BYTES[segmentDescT]*ZsegDescListCnt, raiseSignal: TRUE];
}; 
IF ZsegPortListCnt > 0 THEN TRUSTED {
newPort: PROC RETURNS [lp: ListOfPorts] ~ TRUSTED {
lp _ LIST[[ZsegPortList.portNumber]];
ZsegPortList _ ZsegPortList + UNITS[portT];
};
DsegPortList _ ZsegPortList;
seqPortList _ newPort[];
IF ZsegPortListCnt > 1 THEN {
lastPort: ListOfPorts _ seqPortList;
FOR item: INT IN [1..ZsegPortListCnt) DO
lastPort.rest _ newPort[];
lastPort _ lastPort.rest;
ENDLOOP;
};
[] _ vmDeallocate[targetTask: taskSelf[], address: LOOPHOLE[DsegPortList], size: BYTES[portT]*ZsegPortListCnt, raiseSignal: TRUE];
}; 
};
DSPinObject: PUBLIC PROC [dsPort: portT, tid: tidT, optr: optrT, size: uInt, raiseSignal: BOOL] RETURNS [kernCode: Mach.kernReturnT _ -1] ~ {
innerDSPinObject: PROC [idsPort: portT, itid: tidT, ioptr: optrT, isize: uInt] RETURNS [kernReturnT] ~ TRUSTED MACHINE CODE {
"<ds.h>.DS_PinObject"
};
pinCode: INT _ -1;
pinCode _ innerDSPinObject[dsPort, tid, optr, size];
IF raiseSignal AND pinCode # KernSuccess THEN SIGNAL MachCall[pinCode, Rope.Cat["DS_PinObject failed; code = ", IO.PutFR1["%g", IO.int[pinCode]]]];
RETURN[pinCode];
};
DSLogNewValue: PUBLIC PROC [dsPort: portT, tid: tidT, optr: optrT, newValue: pointerT, newValueCnt: INT, raiseSignal: BOOL] RETURNS [kernCode: Mach.kernReturnT _ -1] ~ {
innerDSLogNewValue: PROC [idsPort: portT, itid: tidT, ioptr: optrT, inewValue: pointerT, inewValueCnt: INT] RETURNS [kernReturnT] ~ TRUSTED MACHINE CODE {
"<ds.h>.DS_LogNewValue"
};
logCode: INT _ -1;
logCode _ innerDSLogNewValue[dsPort, tid, optr, newValue, newValueCnt];
IF raiseSignal AND logCode # KernSuccess THEN SIGNAL MachCall[logCode, Rope.Cat["DS_LogNewValue failed; code = ", IO.PutFR1["%g", IO.int[logCode]]]];
RETURN[logCode];
};
DSLogOldValueNewValue: PUBLIC PROC [dsPort: portT, tid: tidT, optr: optrT, oldValue: pointerT, oldValueCnt: INT, newValue: pointerT, newValueCnt: INT, raiseSignal: BOOL] RETURNS [kernCode: Mach.kernReturnT _ -1] ~ {
innerDSLogOldValueNewValue: PROC [idsPort: portT, itid: tidT, ioptr: optrT, ioldValue: pointerT, ioldValueCnt: INT, inewValue: pointerT, inewValueCnt: INT] RETURNS [kernReturnT] ~ TRUSTED MACHINE CODE {
"<ds.h>.DS_LogOldValueNewValue"
};
logCode: INT _ -1;
logCode _ innerDSLogOldValueNewValue[dsPort, tid, optr, oldValue, oldValueCnt, newValue, newValueCnt];
IF raiseSignal AND logCode # KernSuccess THEN SIGNAL MachCall[logCode, Rope.Cat["DS_LogOldValueNewValue failed; code = ", IO.PutFR1["%g", IO.int[logCode]]]];
RETURN[logCode];
};
DSPrepare: PUBLIC PROC [dsPort: portT, topBTid: btidT, prepareData: pointerT, prepareDataCnt: INT, raiseSignal: BOOL] RETURNS [kernCode: Mach.kernReturnT _ -1] ~ {
innerDSPrepare: PROC [idsPort: portT, itopBTid: btidT, iprepareData: pointerT, iprepareDataCnt: INT] RETURNS [kernReturnT] ~ TRUSTED MACHINE CODE {
"<ds.h>.DS_Prepare"
};
prepareCode: INT _ -1;
prepareCode _ innerDSPrepare[dsPort, topBTid, prepareData, prepareDataCnt];
IF prepareCode # KernSuccess THEN SIGNAL MachCall[prepareCode, Rope.Cat["DS_Prepare failed; code = ", IO.PutFR1["%g", IO.int[prepareCode]]]];
RETURN[prepareCode];
};

DSQInit: PUBLIC PROC [sharedMemAddr: Mach.vmAddressT] ~ {
innerDSQInit: PROC [XsharedMemAddr: Mach.vmAddressT] ~ TRUSTED MACHINE CODE {
"<ds.h>.Dsq_Init"
};
innerDSQInit[sharedMemAddr];
};
camelotStringTFromRope: PROC [name: Rope.ROPE] RETURNS [camelotString: REF camelotStringT] ~ {
oNSize: INT _ 0;
camelotString _ NEW[camelotStringT];
oNSize _ Rope.Length[name];
IF oNSize >= Camelot.CAMELOTSTRINGLENGTH THEN ERROR;
FOR index: INT IN [0..oNSize) DO
camelotString[index] _ Rope.Fetch[name, index];
ENDLOOP;
camelotString[oNSize] _ 0C;
};
TAAddApplication: PUBLIC PROC [tPort: portT, atPort: portT, authName: Rope.ROPE, raiseSignal: BOOL] RETURNS [applicationID: applicationIdT, taPort: portT, kernCode: Mach.kernReturnT _ -1] ~ TRUSTED {
innerTAAddApplication: PROC [itPort: portT, iatPort: portT, iauthName: POINTER TO camelotStringT, iapplicationID: POINTER TO applicationIdT, itaPort: POINTER TO portT] RETURNS [kernReturnT] ~ TRUSTED MACHINE CODE {
"<ta.h>.TA_AddApplication"
};
camString: REF camelotStringT;
camString _ camelotStringTFromRope[authName];
kernCode _ innerTAAddApplication[tPort, atPort, LOOPHOLE[camString], @applicationID, @taPort];
IF raiseSignal AND kernCode # KernSuccess THEN SIGNAL MachCall[kernCode, Rope.Cat["TA_AddApplication failed; code = ", IO.PutFR1["%g", IO.int[kernCode]]]];
};
TABegin: PUBLIC PROC [taPort: portT, parentTid: tidT, transType: transactionTypeT, raiseSignal: BOOL] RETURNS [newTid: tidT, kernCode: Mach.kernReturnT _ -1] ~ TRUSTED {
innerTABegin: PROC [taPortInner: portT, parentTidInner: tidT, transTypeInner: transactionTypeT, newTidInner: POINTER TO tidT] RETURNS [kernReturnT] ~ TRUSTED MACHINE CODE {
"<ta.h>.TA_Begin"
};
kernCode _ innerTABegin[taPort, parentTid, transType, @newTid];
IF raiseSignal AND kernCode # KernSuccess THEN SIGNAL MachCall[kernCode, Rope.Cat["TA_Begin failed; code = ", IO.PutFR1["%g", IO.int[kernCode]]]];
};
TAEnd: PUBLIC PROC [taPort: portT, tid: tidT, protocolType: protocolTypeT, raiseSignal: BOOL] RETURNS [timestamp: timestampT, status: INT, kernCode: Mach.kernReturnT _ -1] ~ TRUSTED {
innerTAEnd: PROC [taPortInner: portT, tidInner: tidT, protocolTypeInner: protocolTypeT, timestampInner: POINTER TO timestampT, statusInner: POINTER TO INT] RETURNS [kernReturnT] ~ TRUSTED MACHINE CODE {
"<ta.h>.TA_End"
};
kernCode _ innerTAEnd[taPort, tid, protocolType, @timestamp, @status];
IF raiseSignal AND kernCode # KernSuccess THEN SIGNAL MachCall[kernCode, Rope.Cat["TA_End failed; code = ", IO.PutFR1["%g", IO.int[kernCode]]]];
};
TAKill: PUBLIC PROC [taPort: portT, tid: tidT, status: INT, raiseSignal: BOOL] RETURNS [kernCode: Mach.kernReturnT _ -1] ~ TRUSTED {
innerTAKill: PROC [taPortInner: portT, tidInner: tidT, statusInner: INT] RETURNS [kernReturnT] ~ TRUSTED MACHINE CODE {
"<ta.h>.TA_Kill"
};
kernCode _ innerTAKill[taPort, tid, status];
IF raiseSignal AND kernCode # KernSuccess THEN SIGNAL MachCall[kernCode, Rope.Cat["TA_Kill failed; code = ", IO.PutFR1["%g", IO.int[kernCode]]]];
};
TSJoin: PUBLIC PROC [tsPort: portT, tid: tidT, raiseSignal: BOOL] RETURNS [kernCode: Mach.kernReturnT _ -1] ~ {
innerTSJoin: PROC [tsPortInner: portT, tidInner: tidT] RETURNS [kernReturnT] ~ TRUSTED MACHINE CODE {
"<ts.h>.TS_Join"
};
kernCode _ innerTSJoin[tsPort, tid];
IF raiseSignal AND kernCode # KernSuccess THEN SIGNAL MachCall[kernCode, Rope.Cat["TA_Join failed; code = ", IO.PutFR1["%g", IO.int[kernCode]]]];
};
TDAddDataServer: PUBLIC PROC [tdPort: portT, serverID: serverIdT, sendPort: portT, raiseSignal: BOOL] RETURNS [rcvPort: portT, kernCode: Mach.kernReturnT _ -1] ~ TRUSTED {
innerTDAddDataServer: PROC [itdPort: portT, iserverID: serverIdT, isendPort: portT, ircvPort: POINTER TO portT] RETURNS [kernReturnT]~ TRUSTED MACHINE CODE {
"<td.h>.TD_AddDataServer"
};
kernCode _ innerTDAddDataServer[tdPort, serverID, sendPort, @rcvPort];
IF raiseSignal AND kernCode # KernSuccess THEN SIGNAL MachCall[kernCode, Rope.Cat["TD_AddDataServer failed; code = ", IO.PutFR1["%g", IO.int[kernCode]]]];
};
objectNameTFromRope: PROC [name: Rope.ROPE] RETURNS [objectNameString: REF objectNameT] ~ {
oNSize: INT _ 0;
objectNameString _ NEW[objectNameT];
oNSize _ Rope.Length[name];
IF oNSize >= ObjectNameLength THEN ERROR;
FOR index: INT IN [0..oNSize) DO
objectNameString[index] _ Rope.Fetch[name, index];
ENDLOOP;
objectNameString[oNSize] _ 0C;
};
CSSignIn: PUBLIC PROC [nameServerPort: Mach.portT, name: Rope.ROPE, port: Mach.portT, raiseSignal: BOOL] RETURNS [kernCode: Mach.kernReturnT] ~ {
innerCSSignIn: PROC [inameServerPort: Mach.portT, iname: POINTER TO objectNameT, iport: Mach.portT] RETURNS [kernReturnT] ~ TRUSTED MACHINE CODE {
"<cs.h>.CS_SignIn"
};
objectNameString: REF objectNameT;
objectNameString _ objectNameTFromRope[name];
kernCode _ innerCSSignIn[nameServerPort, LOOPHOLE[objectNameString], port];
IF raiseSignal AND kernCode # KernSuccess THEN SIGNAL MachCall[kernCode, Rope.Cat["CS_SignIn failed; code = ", IO.PutFR1["%g", IO.int[kernCode]]]];
};
CSSignOut: PUBLIC PROC [nameServerPort: Mach.portT, name: Rope.ROPE, port: Mach.portT, raiseSignal: BOOL] RETURNS [kernCode: Mach.kernReturnT] ~ {
innerCSSignOut: PROC [inameServerPort: Mach.portT, iname: POINTER TO objectNameT, iport: Mach.portT] RETURNS [kernReturnT] ~ TRUSTED MACHINE CODE {
"<cs.h>.CS_SignOut"
};
objectNameString: REF objectNameT;
objectNameString _ objectNameTFromRope[name];
kernCode _ innerCSSignOut[nameServerPort, LOOPHOLE[objectNameString], port];
IF raiseSignal AND kernCode # KernSuccess THEN SIGNAL MachCall[kernCode, Rope.Cat["CS_SignOut failed; code = ", IO.PutFR1["%g", IO.int[kernCode]]]];
};
innerLookup: PROC [nameServerPort: Mach.portT, name: Rope.ROPE, site: Rope.ROPE, numberWanted: INT, maxSeconds: INT, raiseSignal: BOOL, cs: BOOL] RETURNS [portList: Mach.ListOfPorts, kernCode: Mach.kernReturnT] ~ {
innerCSLookup: PROC [inameServerPort: Mach.portT, iname: POINTER TO objectNameT, isite: POINTER TO objectNameT, inumberWanted: INT, imaxSeconds: INT, iportList: POINTER TO portArrayT, iportListCnt: POINTER TO INT] RETURNS [kernReturnT] ~ TRUSTED MACHINE CODE {
"<cs.h>.CS_Lookup"
};
innerCALookup: PROC [inameServerPort: Mach.portT, iname: POINTER TO objectNameT, isite: POINTER TO objectNameT, inumberWanted: INT, imaxSeconds: INT, iportList: POINTER TO portArrayT, iportListCnt: POINTER TO INT] RETURNS [kernReturnT] ~ TRUSTED MACHINE CODE {
"<ca.h>.CA_Lookup"
};
objectNameString: REF objectNameT;
siteString: REF objectNameT;
ZportList, DportList: portArrayT _ NIL;
ZportListCnt: INT _ -1;
objectNameString _ objectNameTFromRope[name];
siteString _ objectNameTFromRope[site];
IF cs THEN TRUSTED {
kernCode _ innerCSLookup[nameServerPort, LOOPHOLE[objectNameString], LOOPHOLE[siteString], numberWanted, maxSeconds, @ZportList, @ZportListCnt];
IF raiseSignal AND kernCode # KernSuccess THEN SIGNAL MachCall[kernCode, Rope.Cat["CS_Lookup failed; code = ", IO.PutFR1["%g", IO.int[kernCode]]]];
}
 ELSE TRUSTED {
kernCode _ innerCALookup[nameServerPort, LOOPHOLE[objectNameString], LOOPHOLE[siteString], numberWanted, maxSeconds, @ZportList, @ZportListCnt];
IF raiseSignal AND kernCode # KernSuccess THEN SIGNAL MachCall[kernCode, Rope.Cat["CA_Lookup failed; code = ", IO.PutFR1["%g", IO.int[kernCode]]]];
};
IF ZportListCnt > 0 THEN TRUSTED {
newPort: PROC RETURNS [lp: ListOfPorts] ~ TRUSTED {
lp _ LIST[[ZportList.portNumber]];
ZportList _ ZportList + UNITS[portT];
};
DportList _ ZportList;
portList _ newPort[];
IF ZportListCnt > 1 THEN {
lastPort: ListOfPorts _ portList;
FOR item: INT IN [1..ZportListCnt) DO
lastPort.rest _ newPort[];
lastPort _ lastPort.rest;
ENDLOOP;
};
[] _ vmDeallocate[targetTask: taskSelf[], address: LOOPHOLE[DportList], size: BYTES[portT]*ZportListCnt, raiseSignal: TRUE];
}; 
};
CSLookup: PUBLIC PROC [nameServerPort: Mach.portT, name: Rope.ROPE, site: Rope.ROPE, numberWanted: INT, maxSeconds: INT, raiseSignal: BOOL] RETURNS [portList: Mach.ListOfPorts, kernCode: Mach.kernReturnT] ~ {
[portList, kernCode] _ innerLookup[nameServerPort, name, site, numberWanted, maxSeconds, raiseSignal, TRUE];
};
CALookup: PUBLIC PROC [nameServerPort: Mach.portT, name: Rope.ROPE, site: Rope.ROPE, numberWanted: INT, maxSeconds: INT, raiseSignal: BOOL] RETURNS [portList: Mach.ListOfPorts, kernCode: Mach.kernReturnT] ~ {
[portList, kernCode] _ innerLookup[nameServerPort, name, site, numberWanted, maxSeconds, raiseSignal, FALSE];
};


END.

^CamelotImpl.mesa
Copyright Ó 1988 by Xerox Corporation.  All rights reserved.
Bob Hagmann September 29, 1988 1:57:44 pm PDT

Handle calls to Camelot from Cedar.

Parameters to Camelot from C have IN, OUT, and INOUT parameters, at least when used with MIG.  They are processed to (sometimes) change the real calling sequence to the C code.  To find out what the real calling sequence for XX_someRoutine is, look in XX.h somewhere in the ~camelot directory subtree (e.g., ~camelot/camelot/alpha/include/camlib/ts.h).
I (rbh) think that the following is the algorithm to change parameters:
IN - no change (pass by copy)
OUT and INOUT - normally make it indirect, that is pass by address.  However, for lists (I don't know how it guesses that something is a list) the argument is divided into two new arguments.  The first one is passed by address and is of type of "pointer to the type of the argument".  This is just the indirect passing of the argument.  It has the same name as the argument.  But then a pointer to an "unsigned int" (read CARD) is passed!  This will get the number of items in the list.  Its name is the argument's name with "Cnt" appended.
To see this in action, open ~camelot/alpha/src/lib/camlib/ds.h ( the same contents seem to be in ~camelot/alpha/include/camlib/ds.h) and look at the DS_Initialize call (you'll have to modify this name after the alpha release).  Compare with ~camelot/alpha/src/lib/camlib/ds.defs -- which matches the documentation.



Exported recoverable storage management procedures
Initialize the data server.

Pin an object in preparation for modification.

Send a new value of an object to the log.

Send a new value of an object to the log.

Send a new value of an object to the log.
Send a new value of an object to the log.



Exported transaction management procedures

Initialize an application to the transaction manager.

Start a new transaction.

Try to commit a transaction.

Try to abort a transaction.

Join a server to a transaction.

Join a server to a transaction.
Initialize the data server to the transaction manager.
Name server


Sign in as a data server.

Sign out as a data server.

Lookup for servers.

Lookup for servers.

Lookup for applications.

Exported lock procedures (if we are going to use CamLib)
Lock: PUBLIC PROC [tid: tidT, lockName: LockName, lockMode: lockModeT] ~ {
Obtain the lock for this transaction.
innerLOCK: PROC [lockNameInner: LockName, lockModeInner: lockModeT] ~ TRUSTED MACHINE CODE {
"LOCK"
};
MakeThisThreadPartOfTransaction[tid];
innerLOCK[lockName, lockMode];
};


TryLock: PUBLIC PROC [tid: tidT, lockName: LockName, lockMode: lockModeT] ~ {
Obtain the lock for this transaction if immediately available.
innerTryLock: PROC [lockNameInner: LockName, lockModeInner: lockModeT] ~ TRUSTED MACHINE CODE {
"TRY_LOCK"
};
MakeThisThreadPartOfTransaction[tid];
innerTryLock[lockName, lockMode];
};


Unlock: PUBLIC PROC [tid: tidT, lockName: LockName] ~ {
Release lock for this transaction.
innerUnlock: PROC [lockNameInner: LockName] ~ TRUSTED MACHINE CODE {
"UNLOCK"
};
MakeThisThreadPartOfTransaction[tid];
innerUnlock[lockName];
};


DemoteLock: PUBLIC PROC [tid: tidT, lockName: LockName] ~ {
Demote write lock to a read lock for this transaction.
innerDemoteLock: PROC [lockNameInner: LockName] ~ TRUSTED MACHINE CODE {
"UNLOCK"
};
MakeThisThreadPartOfTransaction[tid];
innerDemoteLock[lockName];
};


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