本文整理汇总了C++中nsCycleCollectionTraversalCallback::DescribeNode方法的典型用法代码示例。如果您正苦于以下问题：C++ nsCycleCollectionTraversalCallback::DescribeNode方法的具体用法？C++ nsCycleCollectionTraversalCallback::DescribeNode怎么用？C++ nsCycleCollectionTraversalCallback::DescribeNode使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类nsCycleCollectionTraversalCallback的用法示例。
在下文中一共展示了nsCycleCollectionTraversalCallback::DescribeNode方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: Downcast
NS_CYCLE_COLLECTION_CLASSNAME(nsXPCWrappedJS)::Traverse
(void *p, nsCycleCollectionTraversalCallback &cb)
{
nsISupports *s = static_cast<nsISupports*>(p);
NS_ASSERTION(CheckForRightISupports(s),
"not the nsISupports pointer we expect");
nsXPCWrappedJS *tmp = Downcast(s);
nsrefcnt refcnt = tmp->mRefCnt.get();
if (cb.WantDebugInfo()) {
char name[72];
if (tmp->GetClass())
JS_snprintf(name, sizeof(name), "nsXPCWrappedJS (%s)",
tmp->GetClass()->GetInterfaceName());
else
JS_snprintf(name, sizeof(name), "nsXPCWrappedJS");
cb.DescribeNode(RefCounted, refcnt, sizeof(nsXPCWrappedJS), name);
} else {
cb.DescribeNode(RefCounted, refcnt, sizeof(nsXPCWrappedJS),
"nsXPCWrappedJS");
}
// nsXPCWrappedJS keeps its own refcount artificially at or above 1, see the
// comment above nsXPCWrappedJS::AddRef.
cb.NoteXPCOMChild(s);
if(refcnt > 1)
// nsXPCWrappedJS roots its mJSObj when its refcount is > 1, see
// the comment above nsXPCWrappedJS::AddRef.
cb.NoteScriptChild(nsIProgrammingLanguage::JAVASCRIPT,
tmp->GetJSObject());
nsXPCWrappedJS* root = tmp->GetRootWrapper();
if(root == tmp)
// The root wrapper keeps the aggregated native object alive.
cb.NoteXPCOMChild(tmp->GetAggregatedNativeObject());
else
// Non-root wrappers keep their root alive.
cb.NoteXPCOMChild(static_cast<nsIXPConnectWrappedJS*>(root));
return NS_OK;
}