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This commit is contained in:
David Rose 2001-04-18 17:12:35 +00:00
parent deb243f994
commit afb1ea3200
1 changed files with 20 additions and 7 deletions
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27
panda/src/graph/arcChain.cxx
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@ -14,19 +14,32 @@
////////////////////////////////////////////////////////////////////
void ArcChain::ArcComponent::
operator = (const ArcComponent &copy) {
_next = copy._next;
// We have to be careful with the reference counts here,
// particularly since we might be changing the pointer type from arc
// pointer to node pointer, or vice-versa, with this assignment.
if (has_arc()) {
// Ref the new one before unreffing the old one, so we don't
// accidentally delete in the interim.
// First, ref the new pointer once, so we don't accidentally delete
// in the interim.
if (copy.has_arc()) {
copy._p._arc->ref();
copy._p._arc->ref_parent();
_p._arc->unref_parent();
unref_delete(_p._arc);
_p._arc = copy._p._arc;
} else {
copy._p._node->ref();
}
// Now unref the old pointer.
if (has_arc()) {
_p._arc->unref_parent();
unref_delete(_p._arc);
} else {
unref_delete(_p._node);
}
// Now reassign the pointers.
_next = copy._next;
if (has_arc()) {
_p._arc = copy._p._arc;
} else {
_p._node = copy._p._node;
}
}