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-rw-r--r--generic/tclOOCall.c99
1 files changed, 72 insertions, 27 deletions
diff --git a/generic/tclOOCall.c b/generic/tclOOCall.c
index 26fd09f..facf90d 100644
--- a/generic/tclOOCall.c
+++ b/generic/tclOOCall.c
@@ -38,6 +38,12 @@ struct ChainBuilder {
#define DEFINITE_PUBLIC 0x200000
#define KNOWN_STATE (DEFINITE_PROTECTED | DEFINITE_PUBLIC)
#define SPECIAL (CONSTRUCTOR | DESTRUCTOR | FORCE_UNKNOWN)
+#define BUILDING_MIXINS 0x400000
+#define TRAVERSED_MIXIN 0x800000
+#define OBJECT_MIXIN 0x1000000
+#define MIXIN_CONSISTENT(flags) \
+ (((flags) & OBJECT_MIXIN) || \
+ !((flags) & BUILDING_MIXINS) == !((flags) & TRAVERSED_MIXIN))
/*
* Function declarations for things defined in this file.
@@ -45,13 +51,13 @@ struct ChainBuilder {
static void AddClassFiltersToCallContext(Object *const oPtr,
Class *clsPtr, struct ChainBuilder *const cbPtr,
- Tcl_HashTable *const doneFilters);
+ Tcl_HashTable *const doneFilters, int flags);
static void AddClassMethodNames(Class *clsPtr, const int flags,
Tcl_HashTable *const namesPtr);
static inline void AddMethodToCallChain(Method *const mPtr,
struct ChainBuilder *const cbPtr,
Tcl_HashTable *const doneFilters,
- Class *const filterDecl);
+ Class *const filterDecl, int flags);
static inline void AddSimpleChainToCallContext(Object *const oPtr,
Tcl_Obj *const methodNameObj,
struct ChainBuilder *const cbPtr,
@@ -150,7 +156,7 @@ void
TclOODeleteChain(
CallChain *callPtr)
{
- if (--callPtr->refCount >= 1) {
+ if (callPtr == NULL || callPtr->refCount-- > 1) {
return;
}
if (callPtr->chain != callPtr->staticChain) {
@@ -434,7 +440,7 @@ TclOOGetSortedMethodList(
AddClassMethodNames(oPtr->selfCls, flags, &names);
FOREACH(mixinPtr, oPtr->mixins) {
- AddClassMethodNames(mixinPtr, flags, &names);
+ AddClassMethodNames(mixinPtr, flags|TRAVERSED_MIXIN, &names);
}
/*
@@ -598,7 +604,7 @@ AddClassMethodNames(
/* TODO: Beware of infinite loops! */
FOREACH(mixinPtr, clsPtr->mixins) {
- AddClassMethodNames(mixinPtr, flags, namesPtr);
+ AddClassMethodNames(mixinPtr, flags|TRAVERSED_MIXIN, namesPtr);
}
}
@@ -695,13 +701,13 @@ AddSimpleChainToCallContext(
FOREACH(mixinPtr, oPtr->mixins) {
AddSimpleClassChainToCallContext(mixinPtr, methodNameObj, cbPtr,
- doneFilters, flags, filterDecl);
+ doneFilters, flags|TRAVERSED_MIXIN, filterDecl);
}
if (oPtr->methodsPtr) {
hPtr = Tcl_FindHashEntry(oPtr->methodsPtr, (char*) methodNameObj);
if (hPtr != NULL) {
AddMethodToCallChain(Tcl_GetHashValue(hPtr), cbPtr,
- doneFilters, filterDecl);
+ doneFilters, filterDecl, flags);
}
}
}
@@ -732,9 +738,15 @@ AddMethodToCallChain(
* processed. If NULL, not processing filters.
* Note that this function does not update
* this hashtable. */
- Class *const filterDecl) /* The class that declared the filter. If
+ Class *const filterDecl, /* The class that declared the filter. If
* NULL, either the filter was declared by the
* object or this isn't a filter. */
+ int flags) /* Used to check if we're mixin-consistent
+ * only. Mixin-consistent means that either
+ * we're looking to add things from a mixin
+ * and we have passed a mixin, or we're not
+ * looking to add things from a mixin and have
+ * not passed a mixin. */
{
register CallChain *callPtr = cbPtr->callChainPtr;
int i;
@@ -743,9 +755,11 @@ AddMethodToCallChain(
* Return if this is just an entry used to record whether this is a public
* method. If so, there's nothing real to call and so nothing to add to
* the call chain.
+ *
+ * This is also where we enforce mixin-consistency.
*/
- if (mPtr == NULL || mPtr->typePtr == NULL) {
+ if (mPtr == NULL || mPtr->typePtr == NULL || !MIXIN_CONSISTENT(flags)) {
return;
}
@@ -1001,6 +1015,8 @@ TclOOGetCallContext(
if (flags & FORCE_UNKNOWN) {
AddSimpleChainToCallContext(oPtr, oPtr->fPtr->unknownMethodNameObj,
+ &cb, NULL, BUILDING_MIXINS, NULL);
+ AddSimpleChainToCallContext(oPtr, oPtr->fPtr->unknownMethodNameObj,
&cb, NULL, 0, NULL);
callPtr->flags |= OO_UNKNOWN_METHOD;
callPtr->epoch = -1;
@@ -1024,21 +1040,32 @@ TclOOGetCallContext(
doFilters = 1;
Tcl_InitObjHashTable(&doneFilters);
FOREACH(mixinPtr, oPtr->mixins) {
- AddClassFiltersToCallContext(oPtr, mixinPtr, &cb, &doneFilters);
+ AddClassFiltersToCallContext(oPtr, mixinPtr, &cb, &doneFilters,
+ TRAVERSED_MIXIN|BUILDING_MIXINS|OBJECT_MIXIN);
+ AddClassFiltersToCallContext(oPtr, mixinPtr, &cb, &doneFilters,
+ OBJECT_MIXIN);
}
FOREACH(filterObj, oPtr->filters) {
+ AddSimpleChainToCallContext(oPtr, filterObj, &cb, &doneFilters,
+ BUILDING_MIXINS, NULL);
AddSimpleChainToCallContext(oPtr, filterObj, &cb, &doneFilters, 0,
NULL);
}
- AddClassFiltersToCallContext(oPtr, oPtr->selfCls, &cb, &doneFilters);
+ AddClassFiltersToCallContext(oPtr, oPtr->selfCls, &cb, &doneFilters,
+ BUILDING_MIXINS);
+ AddClassFiltersToCallContext(oPtr, oPtr->selfCls, &cb, &doneFilters,
+ 0);
Tcl_DeleteHashTable(&doneFilters);
}
count = cb.filterLength = callPtr->numChain;
/*
- * Add the actual method implementations.
+ * Add the actual method implementations. We have to do this twice to
+ * handle class mixins right.
*/
+ AddSimpleChainToCallContext(oPtr, methodNameObj, &cb, NULL,
+ flags|BUILDING_MIXINS, NULL);
AddSimpleChainToCallContext(oPtr, methodNameObj, &cb, NULL, flags, NULL);
/*
@@ -1058,6 +1085,8 @@ TclOOGetCallContext(
return NULL;
}
AddSimpleChainToCallContext(oPtr, oPtr->fPtr->unknownMethodNameObj,
+ &cb, NULL, BUILDING_MIXINS, NULL);
+ AddSimpleChainToCallContext(oPtr, oPtr->fPtr->unknownMethodNameObj,
&cb, NULL, 0, NULL);
callPtr->flags |= OO_UNKNOWN_METHOD;
callPtr->epoch = -1;
@@ -1201,7 +1230,9 @@ TclOOGetStereotypeCallChain(
*/
Tcl_InitObjHashTable(&doneFilters);
- AddClassFiltersToCallContext(&obj, clsPtr, &cb, &doneFilters);
+ AddClassFiltersToCallContext(&obj, clsPtr, &cb, &doneFilters,
+ BUILDING_MIXINS);
+ AddClassFiltersToCallContext(&obj, clsPtr, &cb, &doneFilters, 0);
Tcl_DeleteHashTable(&doneFilters);
count = cb.filterLength = callPtr->numChain;
@@ -1209,6 +1240,8 @@ TclOOGetStereotypeCallChain(
* Add the actual method implementations.
*/
+ AddSimpleChainToCallContext(&obj, methodNameObj, &cb, NULL,
+ flags|BUILDING_MIXINS, NULL);
AddSimpleChainToCallContext(&obj, methodNameObj, &cb, NULL, flags, NULL);
/*
@@ -1219,6 +1252,8 @@ TclOOGetStereotypeCallChain(
if (count == callPtr->numChain) {
AddSimpleChainToCallContext(&obj, fPtr->unknownMethodNameObj, &cb,
+ NULL, BUILDING_MIXINS, NULL);
+ AddSimpleChainToCallContext(&obj, fPtr->unknownMethodNameObj, &cb,
NULL, 0, NULL);
callPtr->flags |= OO_UNKNOWN_METHOD;
callPtr->epoch = -1;
@@ -1259,12 +1294,15 @@ AddClassFiltersToCallContext(
Class *clsPtr, /* Class to get the filters from. */
struct ChainBuilder *const cbPtr,
/* Context to fill with call chain entries. */
- Tcl_HashTable *const doneFilters)
+ Tcl_HashTable *const doneFilters,
/* Where to record what filters have been
* processed. Keys are objects, values are
* ignored. */
+ int flags) /* Whether we've gone along a mixin link
+ * yet. */
{
- int i;
+ int i, clearedFlags =
+ flags & ~(TRAVERSED_MIXIN|OBJECT_MIXIN|BUILDING_MIXINS);
Class *superPtr, *mixinPtr;
Tcl_Obj *filterObj;
@@ -1279,7 +1317,8 @@ AddClassFiltersToCallContext(
*/
FOREACH(mixinPtr, clsPtr->mixins) {
- AddClassFiltersToCallContext(oPtr, mixinPtr, cbPtr, doneFilters);
+ AddClassFiltersToCallContext(oPtr, mixinPtr, cbPtr, doneFilters,
+ flags|TRAVERSED_MIXIN);
}
/*
@@ -1288,13 +1327,18 @@ AddClassFiltersToCallContext(
* override how filters work to extend their behaviour.
*/
- FOREACH(filterObj, clsPtr->filters) {
- int isNew;
+ if (MIXIN_CONSISTENT(flags)) {
+ FOREACH(filterObj, clsPtr->filters) {
+ int isNew;
- (void) Tcl_CreateHashEntry(doneFilters, (char *) filterObj, &isNew);
- if (isNew) {
- AddSimpleChainToCallContext(oPtr, filterObj, cbPtr, doneFilters,
- 0, clsPtr);
+ (void) Tcl_CreateHashEntry(doneFilters, (char *) filterObj,
+ &isNew);
+ if (isNew) {
+ AddSimpleChainToCallContext(oPtr, filterObj, cbPtr,
+ doneFilters, clearedFlags|BUILDING_MIXINS, clsPtr);
+ AddSimpleChainToCallContext(oPtr, filterObj, cbPtr,
+ doneFilters, clearedFlags, clsPtr);
+ }
}
}
@@ -1308,7 +1352,8 @@ AddClassFiltersToCallContext(
goto tailRecurse;
default:
FOREACH(superPtr, clsPtr->superclasses) {
- AddClassFiltersToCallContext(oPtr, superPtr, cbPtr, doneFilters);
+ AddClassFiltersToCallContext(oPtr, superPtr, cbPtr, doneFilters,
+ flags);
}
case 0:
return;
@@ -1355,16 +1400,16 @@ AddSimpleClassChainToCallContext(
tailRecurse:
FOREACH(superPtr, classPtr->mixins) {
AddSimpleClassChainToCallContext(superPtr, methodNameObj, cbPtr,
- doneFilters, flags, filterDecl);
+ doneFilters, flags|TRAVERSED_MIXIN, filterDecl);
}
if (flags & CONSTRUCTOR) {
AddMethodToCallChain(classPtr->constructorPtr, cbPtr, doneFilters,
- filterDecl);
+ filterDecl, flags);
} else if (flags & DESTRUCTOR) {
AddMethodToCallChain(classPtr->destructorPtr, cbPtr, doneFilters,
- filterDecl);
+ filterDecl, flags);
} else {
Tcl_HashEntry *hPtr = Tcl_FindHashEntry(&classPtr->classMethods,
(char *) methodNameObj);
@@ -1383,7 +1428,7 @@ AddSimpleClassChainToCallContext(
flags |= DEFINITE_PROTECTED;
}
}
- AddMethodToCallChain(mPtr, cbPtr, doneFilters, filterDecl);
+ AddMethodToCallChain(mPtr, cbPtr, doneFilters, filterDecl, flags);
}
}
generated by cgit v0.12 at 2024-07-07 19:09:36 (GMT)