DIRECTORY CD, Rope, TokenIO; CDProperties: CEDAR DEFINITIONS = BEGIN PropList: TYPE = CD.PropList; PropRef: TYPE = CD.PropRef; --ABSOLUTELY NEVER NIL InitPropRef: PROC [] RETURNS [PropRef] = INLINE { RETURN [NEW[PropList_NIL]] }; RegisterProperty: PROC [prop: REF, registrationKey: REF_NIL] RETURNS [first: BOOL]; PutProp: PROC [onto: REF, prop: REF, val: REF_NIL]; GetProp: PROC [from: REF, prop: REF] RETURNS [REF]; GetListProp: PROC [propList: PropList, prop: REF] RETURNS [REF]; PutInstanceProp: PROC [onto: CD.Instance, prop: REF, val: REF_NIL]; PutDesignProp: PROC [onto: CD.Design, prop: REF, val: REF_NIL]; PutTechnologyProp: PROC [onto: CD.Technology, prop: REF, val: REF_NIL]; PutAtomProp: PROC [onto: ATOM, prop: REF, val: REF_NIL]; PutObjectProp: PROC [onto: CD.Object, prop: REF, val: REF_NIL]; PutLayerProp: PROC [onto: CD.Layer, prop: REF, val: REF_NIL]; PutPRefProp: PROC [onto: CD.PropRef, prop: REF, val: REF_NIL]; GetInstanceProp: PROC [from: CD.Instance, prop: REF] RETURNS [REF] = INLINE { RETURN [GetListProp[from.properties, prop]] }; GetDesignProp: PROC [from: CD.Design, prop: REF] RETURNS [REF] = INLINE { RETURN [GetListProp[from.properties^, prop]] }; GetTechnologyProp: PROC [from: CD.Technology, prop: REF] RETURNS [REF] = INLINE { RETURN [GetListProp[from.properties^, prop]] }; GetAtomProp: PROC [from: ATOM, prop: REF] RETURNS [REF]; GetObjectProp: PROC [from: CD.Object, prop: REF] RETURNS [REF] = INLINE { RETURN [GetListProp[from.properties, prop]] }; GetLayerProp: PROC [from: CD.Layer, prop: REF] RETURNS [REF]; GetPRefProp: PROC [from: CD.PropRef, prop: REF] RETURNS [REF] = INLINE { RETURN [GetListProp[from^, prop]] }; PutPropProp: PROC [onto: REF, key1, key2: REF_, val: REF_NIL]; GetPropProp: PROC [from: REF, key1, key2: REF_] RETURNS [REF]; InstallProcs: PROC [prop: REF, procs: PropertyProcsRec _ [properties: NIL]]; FetchProcs: PROC [prop: REF] RETURNS [PropertyProcs]; Register: PROC [prop: ATOM, procs: PropertyProcsRec _ [properties: NIL], registrationKey: REF _ NIL] RETURNS [sameProp: ATOM]; PropertyProcs: TYPE = REF PropertyProcsRec; PropertyProcsRec: TYPE = RECORD [ makeCopy: MakeCopyProc _ NIL, internalWrite: InternalPWriteProc _ NIL, internalRead: InternalPReadProc _ NIL, prettyPrint: PrettyPrintProc _ NIL, exclusive: BOOL _ FALSE, --the implementation requests others not too fool with autoRem: BOOL _ FALSE, --removed on edits reserved: BOOL _ FALSE, --for experiments key: REF _ NIL, --the prop field of registration properties: PropList _ NIL ]; MakeCopyProc: TYPE = PROC [prop: REF, val: REF, purpose: REF_NIL] RETURNS [valCopy: REF]; InternalPWriteProc: TYPE = PROC [h: TokenIO.Handle, prop: REF, val: REF]; InternalPReadProc: TYPE = PROC [h: TokenIO.Handle, prop: ATOM] RETURNS [val: REF]; PrettyPrintProc: TYPE = PROC [prop: REF, val: REF] RETURNS [r: Rope.ROPE]; CopyProps: PROC [propList: PropList, putOnto: REF, purpose: REF_NIL]; AppendProps: PROC [winner, looser: PropList_NIL, putOnto: REF, purpose: REF_NIL]; DCopyProps: PROC [propList: PropList, purpose: REF_NIL] RETURNS [copy: PropList]; DAppendProps: PROC [winner, looser: PropList_NIL, purpose: REF_NIL] RETURNS [copy: PropList]; DoWithinLock: PRIVATE PROC [p: PROC]; DontCopy: PROC [prop: REF, val: REF, purpose: REF_NIL] RETURNS [nil: REF]; CopyVal: PROC [prop: REF, val: REF, purpose: REF_NIL] RETURNS [valCopy: REF]; RopePWrite: PROC [h: TokenIO.Handle, prop: REF, val: REF]; RopePRead: PROC [h: TokenIO.Handle, prop: ATOM] RETURNS [val: REF]; IntPWrite: PROC [h: TokenIO.Handle, prop: REF, val: REF]; IntPRead: PROC [h: TokenIO.Handle, prop: ATOM] RETURNS [val: REF]; AtomPWrite: PROC [h: TokenIO.Handle, prop: REF, val: REF]; AtomPRead: PROC [h: TokenIO.Handle, prop: ATOM] RETURNS [val: REF]; SomePWrite: PROC [h: TokenIO.Handle, prop: REF, val: REF]; SomePRead: PROC [h: TokenIO.Handle, prop: ATOM] RETURNS [val: REF]; END. ΐCDProperties.mesa a ChipNDale module Copyright c 1983, 1986 by Xerox Corporation. All rights reserved. Created by Christian Jacobi, September 27, 1983 2:06 pm Last edited by: Christian Jacobi, September 19, 1986 5:40:39 pm PDT Rules for property usage A property list requires following the ChipNDale access and registration rules when it is of type CD.PropList, CDProperties.PropList, CD.PropRef, CDProperties.PropRef or a derived type from one of those. Violating access rules can cause chaos for ChipNDale. Violating registration rules might prevent correct behaviour of unrelated ChipNDale tools; it is considered unfair. Access rules Don't modify ChipNDale PropList's directly with PropertyLists; (PutProp can not monitor writing back the result parameter) Registration rules Atoms which start with the letters "CDX" or "CDx" (e.g. $CDxNMosTransitors) must be manual registered by the registrar and RegisterProperty must not be used. Atoms which start with the letters "CDY" or "CDy" (e.g. $CDyNMosTransitors) must not be registered, and there is no waranty of non-conflict. These may be used for debugging only. Atoms which start with other letters must be registered with RegisterProperty. RegisterProperty allows a registrationKey to enable re-registration. Use your name or the module name of the module you are implementing as registrationKey. Other REF-types need not be registered, since no conflicts may occur. Every module is allowed to introduce only a finite (fixed at compile time) number of "property names"s; they are kept in a table for "ever". Property registrations cannot be removed, since they may reside somewhere in the stored data. --Types and registration --Use only CDProperties to modify ChipNDale PropList's; Never PropertyLists directly. --Initialization value for a PropRef --An object MUST be not accessible for ChipNDale until all its PropRef's are initialized. --Registers "prop" for usage; any program which wants to use an ATOM as a "prop" can --make sure it is the only user of this "prop". --If registrationKey#NIL and registrationKey is equal to registrationKey of previous --registration, a property registered again, otherwise raise CD.Error[doubleRegistration] --if prop is re-registered. --Usage --Puts a prop val pair on a property list --onto must not be of type PropList --a NIL val removes the property --Fetches a value from a property list; NIL if not found --Fetches a value from a property list; NIL if not found --PutProp and GetProp "understand" the following types: CD.Instance CD.Object CD.PropRef (CDProperties.PropRef) some more types which are only of secondary importance. --Speed-ups and special cases --Putting a NIL val removes the property in all cases --this property is NOT fetchable with Atom.GetProp --The onto Atom need not be registered anywhere, the registration of the --prop is enough to prevent conflicts. --warning: different objects may share bits, property owners loose! --does NOT fetch properties put on an ATOM with Atom.PutProp --The from Atom need not be registered anywhere, the registration of the --prop is enough to prevent conflicts --warning: different objects may share bits, property owners loose! --Two dimensional properties --Put value as property using the key sequence [key1, key2] --[of course: onto's key1 property is a property list, with a key2 property] --For simplicity: implementation might fail on concurrent PutPropProp's --Get property using key sequence [key1, key2] --[assumes: onto's key1 property is a property list, with a key2 property] --General property procedures --Installs procedures for a property registration. --Overwrites values for which procs has non NIL entries (except key). --prop must be registered and owned by caller. --Exceptional: The actual parameter procs.properties might have been created --with PropertyLists directly. --Fetches the property registration --Don't copy PropertyProcs^; it can be extended by future calls of InstallProcs --Short cut for conveniance --sameProp returns prop again, to be used in declarations --Parameters and raised exceptions are the same as in RegisterProperty and InstallProcs --The procedure types of PropertyProcs will be called within CDProperties monitor lock. --They must not call any other procedure from CDProperties (wedges!!); But they may --call PropertyLists directly. --valCopy: may be NIL if property should not be copied --purpose: -- copy procs will not recognize most purposes... -- but a particular property might want a particular handling from some tool --Copies properties individually using their MakeCopyProc's and defaults for some types --The resulting propList is put on putOnto --Copies properties individually using their MakeCopyProc's and defaults for some types. --Works like first copying looser, then copying winner. --copy is a different list from both, looser and winner --The resulting propList copy is put on putOnto --Like CopyProps, but returns PropList; --Consider: if you assign the copy to somewhere, the previous PropList might have been --changed after making the copy and before the assignment is finished. --Like AppendProps, but returns PropList; --Consider: if you assign the copy to somewhere, the previous PropList might have been --changed after making the copy and before the assignment is finished. --Executes arbitrary code within CDProperties monitor lock. Dangerous. --Must not call any other procedure from CDProperties (wedges!!) --May call PropertyLists directly --Particular property procedures for clients implementing properties --to be shure that no copy is made; trivial procedure --copy of val; trivial procedure; is for some types a default anyway Design considerations A registeration procedure for property names is needed to prevent the same property name beeing used by two independent modules. 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