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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "MessagePortParent.h"
#include "MessagePortService.h"
#include "SharedMessagePortMessage.h"
#include "mozilla/Unused.h"
namespace mozilla {
namespace dom {
MessagePortParent::MessagePortParent(const nsID& aUUID)
: mService(MessagePortService::GetOrCreate())
, mUUID(aUUID)
, mEntangled(false)
, mCanSendData(true)
{
MOZ_ASSERT(mService);
}
MessagePortParent::~MessagePortParent()
{
MOZ_ASSERT(!mService);
MOZ_ASSERT(!mEntangled);
}
bool
MessagePortParent::Entangle(const nsID& aDestinationUUID,
const uint32_t& aSequenceID)
{
if (!mService) {
NS_WARNING("Entangle is called after a shutdown!");
return false;
}
MOZ_ASSERT(!mEntangled);
return mService->RequestEntangling(this, aDestinationUUID, aSequenceID);
}
bool
MessagePortParent::RecvPostMessages(nsTArray<MessagePortMessage>&& aMessages)
{
// This converts the object in a data struct where we have BlobImpls.
FallibleTArray<RefPtr<SharedMessagePortMessage>> messages;
if (NS_WARN_IF(
!SharedMessagePortMessage::FromMessagesToSharedParent(aMessages,
messages))) {
return false;
}
if (!mEntangled) {
return false;
}
if (!mService) {
NS_WARNING("Entangle is called after a shutdown!");
return false;
}
if (messages.IsEmpty()) {
return false;
}
return mService->PostMessages(this, messages);
}
bool
MessagePortParent::RecvDisentangle(nsTArray<MessagePortMessage>&& aMessages)
{
// This converts the object in a data struct where we have BlobImpls.
FallibleTArray<RefPtr<SharedMessagePortMessage>> messages;
if (NS_WARN_IF(
!SharedMessagePortMessage::FromMessagesToSharedParent(aMessages,
messages))) {
return false;
}
if (!mEntangled) {
return false;
}
if (!mService) {
NS_WARNING("Entangle is called after a shutdown!");
return false;
}
if (!mService->DisentanglePort(this, messages)) {
return false;
}
CloseAndDelete();
return true;
}
bool
MessagePortParent::RecvStopSendingData()
{
if (!mEntangled) {
return true;
}
mCanSendData = false;
Unused << SendStopSendingDataConfirmed();
return true;
}
bool
MessagePortParent::RecvClose()
{
if (mService) {
MOZ_ASSERT(mEntangled);
if (!mService->ClosePort(this)) {
return false;
}
Close();
}
MOZ_ASSERT(!mEntangled);
Unused << Send__delete__(this);
return true;
}
void
MessagePortParent::ActorDestroy(ActorDestroyReason aWhy)
{
if (mService && mEntangled) {
// When the last parent is deleted, this service is freed but this cannot
// be done when the hashtables are written by CloseAll.
RefPtr<MessagePortService> kungFuDeathGrip = mService;
kungFuDeathGrip->ParentDestroy(this);
}
}
bool
MessagePortParent::Entangled(const nsTArray<MessagePortMessage>& aMessages)
{
MOZ_ASSERT(!mEntangled);
mEntangled = true;
return SendEntangled(aMessages);
}
void
MessagePortParent::CloseAndDelete()
{
Close();
Unused << Send__delete__(this);
}
void
MessagePortParent::Close()
{
mService = nullptr;
mEntangled = false;
}
/* static */ bool
MessagePortParent::ForceClose(const nsID& aUUID,
const nsID& aDestinationUUID,
const uint32_t& aSequenceID)
{
MessagePortService* service = MessagePortService::Get();
if (!service) {
NS_WARNING("The service must exist if we want to close an existing MessagePort.");
return false;
}
return service->ForceClose(aUUID, aDestinationUUID, aSequenceID);
}
} // namespace dom
} // namespace mozilla
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