bool
StructuredCloneHelper::WriteTransferCallback(JSContext* aCx,
JS::Handle<JSObject*> aObj,
uint32_t* aTag,
JS::TransferableOwnership* aOwnership,
void** aContent,
uint64_t* aExtraData)
{
if (!mSupportsTransferring) {
return false;
}
{
MessagePortBase* port = nullptr;
nsresult rv = UNWRAP_OBJECT(MessagePort, aObj, port);
if (NS_SUCCEEDED(rv)) {
// We use aExtraData to store the index of this new port identifier.
*aExtraData = mPortIdentifiers.Length();
MessagePortIdentifier* identifier = mPortIdentifiers.AppendElement();
if (!port->CloneAndDisentangle(*identifier)) {
return false;
}
*aTag = SCTAG_DOM_MAP_MESSAGEPORT;
*aOwnership = JS::SCTAG_TMO_CUSTOM;
*aContent = nullptr;
return true;
}
}
return false;
}
bool
WriteTransfer(JSContext* aCx, JS::Handle<JSObject*> aObj, void* aClosure,
uint32_t* aTag, JS::TransferableOwnership* aOwnership,
void** aContent, uint64_t* aExtraData)
{
MOZ_ASSERT(aClosure);
auto* closure = static_cast<StructuredCloneClosureInternal*>(aClosure);
MessagePortBase* port = nullptr;
nsresult rv = UNWRAP_OBJECT(MessagePort, aObj, port);
if (NS_FAILED(rv)) {
return false;
}
if (closure->mTransferredPorts.Contains(port)) {
// No duplicates.
return false;
}
MessagePortIdentifier identifier;
if (!port->CloneAndDisentangle(identifier)) {
return false;
}
closure->mClosure.mMessagePortIdentifiers.AppendElement(identifier);
closure->mTransferredPorts.AppendElement(port);
*aTag = SCTAG_DOM_MAP_MESSAGEPORT;
*aOwnership = JS::SCTAG_TMO_CUSTOM;
*aContent = nullptr;
*aExtraData = closure->mClosure.mMessagePortIdentifiers.Length() - 1;
return true;
}
static bool
PostMessageTransferStructuredClone(JSContext* aCx,
JS::Handle<JSObject*> aObj,
void* aClosure,
uint32_t* aTag,
JS::TransferableOwnership* aOwnership,
void** aContent,
uint64_t *aExtraData)
{
StructuredCloneInfo* scInfo = static_cast<StructuredCloneInfo*>(aClosure);
NS_ASSERTION(scInfo, "Must have scInfo!");
MessagePortBase *port = nullptr;
nsresult rv = UNWRAP_OBJECT(MessagePort, aObj, port);
if (NS_SUCCEEDED(rv)) {
nsRefPtr<MessagePortBase> newPort;
if (scInfo->mPorts.Get(port, getter_AddRefs(newPort))) {
// No duplicate.
return false;
}
newPort = port->Clone();
scInfo->mPorts.Put(port, newPort);
*aTag = SCTAG_DOM_MAP_MESSAGEPORT;
*aOwnership = JS::SCTAG_TMO_CUSTOM;
*aContent = newPort;
*aExtraData = 0;
return true;
}
return false;
}
