// static
XPCWrappedNativeScope*
XPCWrappedNativeScope::FindInJSObjectScope(JSContext* cx, JSObject* obj,
JSBool OKIfNotInitialized,
XPCJSRuntime* runtime)
{
XPCWrappedNativeScope* scope;
if (!obj)
return nsnull;
// If this object is itself a wrapped native then we can get the
// scope directly.
scope = GetScopeOfObject(obj);
if (scope)
return scope;
// Else we'll have to look up the parent chain to get the scope
JSAutoEnterCompartment ac;
ac.enterAndIgnoreErrors(cx, obj);
#ifdef DEBUG
JSObject *startingObj = obj;
#endif
obj = JS_GetGlobalForObject(cx, obj);
if (js::GetObjectClass(obj)->flags & JSCLASS_XPCONNECT_GLOBAL) {
scope = XPCWrappedNativeScope::GetNativeScope(cx, obj);
if (scope)
return scope;
}
if (!runtime) {
runtime = nsXPConnect::GetRuntimeInstance();
NS_ASSERTION(runtime, "This should never be null!");
}
// XXX We are assuming that the scope count is low enough that traversing
// the linked list is more reasonable then doing a hashtable lookup.
XPCWrappedNativeScope* found = nsnull;
{ // scoped lock
XPCAutoLock lock(runtime->GetMapLock());
DEBUG_TrackScopeTraversal();
for (XPCWrappedNativeScope* cur = gScopes; cur; cur = cur->mNext) {
if (obj == cur->GetGlobalJSObject()) {
found = cur;
break;
}
}
}
if (found) {
// This cannot be called within the map lock!
DEBUG_CheckForComponentsInScope(cx, obj, startingObj,
OKIfNotInitialized, runtime);
return found;
}
// Failure to find the scope is only OK if the caller told us it might fail.
// This flag would only be set in the call from
// XPCWrappedNativeScope::GetNewOrUsed
NS_ASSERTION(OKIfNotInitialized, "No scope has this global object!");
return nsnull;
}
