-- Stub file AlpineTransactionRpcBinderImpl.mesa was translated on
    --  3-May-83 12:39:40 PDT by Lupine of 18-Feb-83 11:25:52 PST.

-- Source interface AlpineTransaction came from file AlpineTransaction.bcd,
    -- which was created on  3-May-83 12:37:59 PDT with version stamp 124#372#30473427702
    -- from source of  8-Mar-83 14:35:29 PST.

-- The RPC stub modules for AlpineTransaction are:
    -- AlpineTransactionRpcControl.mesa;
    -- AlpineTransactionRpcClientImpl.mesa;
    -- AlpineTransactionRpcBinderImpl.mesa;
    -- AlpineTransactionRpcServerImpl.mesa.

-- The parameters for this translation are:
    -- Target language = Cedar;
    -- Default parameter passing = VALUE;
    -- Deallocate server heap arguments = TRUE;
    -- Inline RpcServerImpl dispatcher stubs = TRUE;
    -- Maximum number of dynamic heap NEWs = 50, MDS NEWs = 50;
    -- Acceptable parameter protocols = VersionRange[1,1].

-- NOTE: Discard this module unless you use dynamic client binding.


DIRECTORY
  AlpineTransaction,
  AlpineTransactionRpcControl USING [InterfaceRecord, InterfaceRecordObject],
  AlpineTransactionRpcClientImpl,
  RPC USING [InterfaceName, Zones],
  RTTypesBasic USING [EstablishFinalization, FinalizationQueue, FQEmpty,
      FQNext, NewFQ];


AlpineTransactionRpcBinderImpl: MONITOR
  IMPORTS AlpineTransaction, ClientPrototype: AlpineTransactionRpcClientImpl, RTT: RTTypesBasic
  EXPORTS AlpineTransactionRpcControl
  SHARES  AlpineTransactionRpcControl
  = BEGIN OPEN RpcControl: AlpineTransactionRpcControl, RpcPublic:
      RPC;


-- Dynamic instantiation and binding routines.

  ImportNewInterface: PUBLIC SAFE PROCEDURE [
        interfaceName: RpcPublic.InterfaceName,
        parameterStorage: RpcPublic.Zones ]
      RETURNS [interfaceRecord: RpcControl.InterfaceRecord] =
    TRUSTED BEGIN
    interfaceRecord ← NewInterface[];
    LupineDetails[interfaceRecord].module.ImportInterface [
        interfaceName: interfaceName,
        parameterStorage: parameterStorage
      ! UNWIND => FreeInterface[interfaceRecord] ];
    END;

  UnimportNewInterface: SAFE PROCEDURE [
      interfaceRecord: RpcControl.InterfaceRecord ] =
    TRUSTED BEGIN
    LupineDetails[interfaceRecord].module.UnimportInterface[];
    FreeInterface[interfaceRecord];
    END;


-- Utility routines for interface instantiation and caching.

  ConcreteLupineDetails: TYPE = REF LupineDetailsObject;

  LupineDetailsObject:  PUBLIC TYPE = RECORD [
	module: ClientModule←NIL,
	list: RpcControl.InterfaceRecord←NIL, --package reference
	next: RpcControl.InterfaceRecord←NIL --free list -- ];

  LupineDetails: PROCEDURE [abstractInterface: RpcControl.InterfaceRecord]
      RETURNS [ConcreteLupineDetails] =
    INLINE {RETURN[abstractInterface.lupineDetails]};

  ClientModule: TYPE = POINTER TO FRAME[AlpineTransactionRpcClientImpl];


  clientInterfaceCache: RpcControl.InterfaceRecord ← NIL; -- free interface
      -- records
  clientInterfaceList: RpcControl.InterfaceRecord ← NIL; -- all interface
      -- records

  NewInterfaceRecord: PUBLIC SAFE PROCEDURE
    RETURNS [interfaceRecord: RpcControl.InterfaceRecord] =
    TRUSTED BEGIN
    interfaceRecord ← NEW[RpcControl.InterfaceRecordObject];
    END;

  NewInterface: PROCEDURE RETURNS [interface: RpcControl.InterfaceRecord]=
    BEGIN
    GetCachedInterface: ENTRY PROCEDURE
        RETURNS [cachedIR: RpcControl.InterfaceRecord] =
      INLINE BEGIN ENABLE UNWIND => NULL;
      IF (cachedIR←clientInterfaceCache) # NIL
        THEN clientInterfaceCache ← LupineDetails[clientInterfaceCache].next;
      END;
    ReclaimInterfaces[];
    IF (interface ← GetCachedInterface[]) = NIL
      THEN BEGIN
        ChainNewInterface: ENTRY PROCEDURE =
          INLINE BEGIN ENABLE UNWIND => NULL;
          interface.lupineDetails ← NEW[
            LupineDetailsObject ← [module: module, list: clientInterfaceList]];
          clientInterfaceList ← interface;
          END; -- ChainNewInterface.
        module: ClientModule = NEW ClientPrototype;
        interface ← NewInterfaceRecord[];
        interface↑ ← [
	    Create: module.Create, CreateWorker: module.CreateWorker, AssertAlpineWheel:
	    module.AssertAlpineWheel, Finish: module.Finish, Unknown: AlpineTransaction.Unknown,
	    OperationFailed: AlpineTransaction.OperationFailed];
        ChainNewInterface[];
        END;
    END;

  FreeInterface: ENTRY PROCEDURE [interface: RpcControl.InterfaceRecord]=
    INLINE BEGIN ENABLE UNWIND => NULL;
    LupineDetails[interface].next ← clientInterfaceCache;
    clientInterfaceCache ← interface;
    END;


-- Finalization for dynamic interfaces.  Just cache and reuse for now.

  freedInterfaces: RTT.FinalizationQueue = RTT.NewFQ[20];

  ReclaimInterfaces: PROCEDURE =
    INLINE BEGIN
    WHILE ~RTT.FQEmpty[freedInterfaces] DO
      interface: RpcControl.InterfaceRecord =
        NARROW[RTT.FQNext[freedInterfaces]];
      IF interface.lupineDetails # NIL THEN
        UnimportNewInterface[interface];
      ENDLOOP;
    END;


-- Module initialization.

  RTT.EstablishFinalization[
    type: CODE[RpcControl.InterfaceRecordObject],
    npr: 1,  fq: freedInterfaces ];


  END.  -- AlpineTransactionRpcBinderImpl.