diff options
Diffstat (limited to 'generic/tclNamesp.c')
| -rw-r--r-- | generic/tclNamesp.c | 184 |
1 files changed, 104 insertions, 80 deletions
diff --git a/generic/tclNamesp.c b/generic/tclNamesp.c index b2d717b..8f2a711 100644 --- a/generic/tclNamesp.c +++ b/generic/tclNamesp.c @@ -306,7 +306,7 @@ Tcl_PushCallFrame( /* * TODO: Examine whether it would be better to guard based on NS_DYING - * or NS_KILLED. It appears that these are not tested because they can + * or NS_TEARDOWN. It appears that these are not tested because they can * be set in a global interp that has been [namespace delete]d, but * which never really completely goes away because of lingering global * things like ::errorInfo and [::unknown] and hidden commands. @@ -986,20 +986,21 @@ Tcl_DeleteNamespace( } /* - * If the namespace is on the call frame stack, it is marked as "dying" - * (NS_DYING is OR'd into its flags): the namespace can't be looked up by - * name but its commands and variables are still usable by those active - * call frames. When all active call frames referring to the namespace - * have been popped from the Tcl stack, Tcl_PopCallFrame will call this - * function again to delete everything in the namespace. If no nsName - * objects refer to the namespace (i.e., if its refCount is zero), its - * commands and variables are deleted and the storage for its namespace - * structure is freed. Otherwise, if its refCount is nonzero, the - * namespace's commands and variables are deleted but the structure isn't - * freed. Instead, NS_DEAD is OR'd into the structure's flags to allow the - * namespace resolution code to recognize that the namespace is "deleted". - * The structure's storage is freed by FreeNsNameInternalRep when its - * refCount reaches 0. + * If the namespace is on the call frame stack, it is marked as "dying" + * (NS_DYING is OR'd into its flags): Contents of the namespace are + * still available and visible until the namespace is later marked as + * NS_DEAD, and its commands and variables are still usable by any + * active call frames referring to th namespace. When all active call + * frames referring to the namespace have been popped from the Tcl + * stack, Tcl_PopCallFrame calls Tcl_DeleteNamespace again. If no + * nsName objects refer to the namespace (i.e., if its refCount is + * zero), its commands and variables are deleted and the storage for + * its namespace structure is freed. Otherwise, if its refCount is + * nonzero, the namespace's commands and variables are deleted but the + * structure isn't freed. Instead, NS_DEAD is OR'd into the structure's + * flags to allow the namespace resolution code to recognize that the + * namespace is "deleted". The structure's storage is freed by + * FreeNsNameInternalRep when its refCount reaches 0. */ if (nsPtr->activationCount > (unsigned)(nsPtr == globalNsPtr)) { @@ -1013,16 +1014,16 @@ Tcl_DeleteNamespace( } } nsPtr->parentPtr = NULL; - } else if (!(nsPtr->flags & NS_KILLED)) { + } else if (!(nsPtr->flags & NS_TEARDOWN)) { /* * Delete the namespace and everything in it. If this is the global * namespace, then clear it but don't free its storage unless the - * interpreter is being torn down. Set the NS_KILLED flag to avoid + * interpreter is being torn down. Set the NS_TEARDOWN flag to avoid * recursive calls here - if the namespace is really in the process of * being deleted, ignore any second call. */ - nsPtr->flags |= (NS_DYING|NS_KILLED); + nsPtr->flags |= (NS_DYING|NS_TEARDOWN); TclTeardownNamespace(nsPtr); @@ -1060,7 +1061,7 @@ Tcl_DeleteNamespace( * get killed later, avoiding mem leaks. */ - nsPtr->flags &= ~(NS_DYING|NS_KILLED); + nsPtr->flags &= ~(NS_DYING|NS_TEARDOWN); } } TclNsDecrRefCount(nsPtr); @@ -1073,6 +1074,84 @@ TclNamespaceDeleted( return (nsPtr->flags & NS_DYING) ? 1 : 0; } +void +TclDeleteNamespaceChildren( + Namespace *nsPtr /* Namespace whose children to delete */ +) +{ + Interp *iPtr = (Interp *) nsPtr->interp; + Tcl_HashEntry *entryPtr; + size_t i; + int unchecked; + Tcl_HashSearch search; + /* + * Delete all the child namespaces. + * + * BE CAREFUL: When each child is deleted, it divorces itself from its + * parent. The hash table can't be proplery traversed if its elements are + * being deleted. Because of traces (and the desire to avoid the + * quadratic problems of just using Tcl_FirstHashEntry over and over, [Bug + * f97d4ee020]) copy to a temporary array and then delete all those + * namespaces. + * + * Important: leave the hash table itself still live. + */ + +#ifndef BREAK_NAMESPACE_COMPAT + unchecked = (nsPtr->childTable.numEntries > 0); + while (nsPtr->childTable.numEntries > 0 && unchecked) { + size_t length = nsPtr->childTable.numEntries; + Namespace **children = (Namespace **)TclStackAlloc((Tcl_Interp *) iPtr, + sizeof(Namespace *) * length); + + i = 0; + for (entryPtr = Tcl_FirstHashEntry(&nsPtr->childTable, &search); + entryPtr != NULL; + entryPtr = Tcl_NextHashEntry(&search)) { + children[i] = (Namespace *)Tcl_GetHashValue(entryPtr); + children[i]->refCount++; + i++; + } + unchecked = 0; + for (i = 0 ; i < length ; i++) { + if (!(children[i]->flags & NS_DYING)) { + unchecked = 1; + Tcl_DeleteNamespace((Tcl_Namespace *) children[i]); + TclNsDecrRefCount(children[i]); + } + } + TclStackFree((Tcl_Interp *) iPtr, children); + } +#else + if (nsPtr->childTablePtr != NULL) { + unchecked = (nsPtr->childTable.numEntries > 0); + while (nsPtr->childTable.numEntries > 0 && unchecked) { + size_t length = nsPtr->childTablePtr->numEntries; + Namespace **children = (Namespace **)TclStackAlloc((Tcl_Interp *) iPtr, + sizeof(Namespace *) * length); + + i = 0; + for (entryPtr = Tcl_FirstHashEntry(nsPtr->childTablePtr, &search); + entryPtr != NULL; + entryPtr = Tcl_NextHashEntry(&search)) { + children[i] = (Namespace *)Tcl_GetHashValue(entryPtr); + children[i]->refCount++; + i++; + } + unchecked = 0; + for (i = 0 ; i < length ; i++) { + if (!(children[i]->flags & NS_DYING)) { + unchecked = 1; + Tcl_DeleteNamespace((Tcl_Namespace *) children[i]); + TclNsDecrRefCount(children[i]); + } + } + TclStackFree((Tcl_Interp *) iPtr, children); + } + } +#endif +} + /* *---------------------------------------------------------------------- * @@ -1181,62 +1260,7 @@ TclTeardownNamespace( nsPtr->commandPathSourceList = NULL; } - /* - * Delete all the child namespaces. - * - * BE CAREFUL: When each child is deleted, it will divorce itself from its - * parent. You can't traverse a hash table properly if its elements are - * being deleted. Because of traces (and the desire to avoid the - * quadratic problems of just using Tcl_FirstHashEntry over and over, [Bug - * f97d4ee020]) we copy to a temporary array and then delete all those - * namespaces. - * - * Important: leave the hash table itself still live. - */ - -#ifndef BREAK_NAMESPACE_COMPAT - while (nsPtr->childTable.numEntries > 0) { - size_t length = nsPtr->childTable.numEntries; - Namespace **children = (Namespace **)TclStackAlloc((Tcl_Interp *) iPtr, - sizeof(Namespace *) * length); - - i = 0; - for (entryPtr = Tcl_FirstHashEntry(&nsPtr->childTable, &search); - entryPtr != NULL; - entryPtr = Tcl_NextHashEntry(&search)) { - children[i] = (Namespace *)Tcl_GetHashValue(entryPtr); - children[i]->refCount++; - i++; - } - for (i = 0 ; i < length ; i++) { - Tcl_DeleteNamespace((Tcl_Namespace *) children[i]); - TclNsDecrRefCount(children[i]); - } - TclStackFree((Tcl_Interp *) iPtr, children); - } -#else - if (nsPtr->childTablePtr != NULL) { - while (nsPtr->childTablePtr->numEntries > 0) { - size_t length = nsPtr->childTablePtr->numEntries; - Namespace **children = (Namespace **)TclStackAlloc((Tcl_Interp *) iPtr, - sizeof(Namespace *) * length); - - i = 0; - for (entryPtr = Tcl_FirstHashEntry(nsPtr->childTablePtr, &search); - entryPtr != NULL; - entryPtr = Tcl_NextHashEntry(&search)) { - children[i] = Tcl_GetHashValue(entryPtr); - children[i]->refCount++; - i++; - } - for (i = 0 ; i < length ; i++) { - Tcl_DeleteNamespace((Tcl_Namespace *) children[i]); - TclNsDecrRefCount(children[i]); - } - TclStackFree((Tcl_Interp *) iPtr, children); - } - } -#endif + TclDeleteNamespaceChildren(nsPtr); /* * Free the namespace's export pattern array. @@ -2619,7 +2643,7 @@ Tcl_FindCommand( &simpleName); if ((realNsPtr != NULL) && (simpleName != NULL)) { if ((cxtNsPtr == realNsPtr) - || !(realNsPtr->flags & NS_DYING)) { + || !(realNsPtr->flags & NS_DEAD)) { entryPtr = Tcl_FindHashEntry(&realNsPtr->cmdTable, simpleName); if (entryPtr != NULL) { cmdPtr = (Command *)Tcl_GetHashValue(entryPtr); @@ -2631,7 +2655,7 @@ Tcl_FindCommand( * Next, check along the path. */ - for (i=0 ; i<cxtNsPtr->commandPathLength && cmdPtr==NULL ; i++) { + for (i=0 ; (cmdPtr == NULL) && i<cxtNsPtr->commandPathLength ; i++) { pathNsPtr = cxtNsPtr->commandPathArray[i].nsPtr; if (pathNsPtr == NULL) { continue; @@ -2640,7 +2664,7 @@ Tcl_FindCommand( TCL_NAMESPACE_ONLY, &realNsPtr, &dummyNsPtr, &dummyNsPtr, &simpleName); if ((realNsPtr != NULL) && (simpleName != NULL) - && !(realNsPtr->flags & NS_DYING)) { + && !(realNsPtr->flags & NS_DEAD)) { entryPtr = Tcl_FindHashEntry(&realNsPtr->cmdTable, simpleName); if (entryPtr != NULL) { cmdPtr = (Command *)Tcl_GetHashValue(entryPtr); @@ -2658,7 +2682,7 @@ Tcl_FindCommand( TCL_GLOBAL_ONLY, &realNsPtr, &dummyNsPtr, &dummyNsPtr, &simpleName); if ((realNsPtr != NULL) && (simpleName != NULL) - && !(realNsPtr->flags & NS_DYING)) { + && !(realNsPtr->flags & NS_DEAD)) { entryPtr = Tcl_FindHashEntry(&realNsPtr->cmdTable, simpleName); if (entryPtr != NULL) { cmdPtr = (Command *)Tcl_GetHashValue(entryPtr); @@ -3278,7 +3302,7 @@ NamespaceDeleteCmd( name = TclGetString(objv[i]); namespacePtr = Tcl_FindNamespace(interp, name, NULL, /*flags*/ 0); if ((namespacePtr == NULL) - || (((Namespace *) namespacePtr)->flags & NS_KILLED)) { + || (((Namespace *) namespacePtr)->flags & NS_TEARDOWN)) { Tcl_SetObjResult(interp, Tcl_ObjPrintf( "unknown namespace \"%s\" in namespace delete command", TclGetString(objv[i]))); |