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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 "mozilla/dom/cache/CacheStorageChild.h"
#include "mozilla/Unused.h"
#include "mozilla/dom/cache/CacheChild.h"
#include "mozilla/dom/cache/CacheOpChild.h"
#include "mozilla/dom/cache/CacheStorage.h"
#include "mozilla/dom/cache/CacheWorkerRef.h"
namespace mozilla::dom::cache {
// declared in ActorUtils.h
void DeallocPCacheStorageChild(PCacheStorageChild* aActor) { delete aActor; }
CacheStorageChild::CacheStorageChild(CacheStorageChildListener* aListener,
SafeRefPtr<CacheWorkerRef> aWorkerRef,
ActorChild* aParentActor)
: mParentActor(aParentActor), mListener(aListener), mDelayedDestroy(false) {
MOZ_COUNT_CTOR(cache::CacheStorageChild);
MOZ_DIAGNOSTIC_ASSERT(mListener);
SetWorkerRef(std::move(aWorkerRef));
}
CacheStorageChild::~CacheStorageChild() {
MOZ_COUNT_DTOR(cache::CacheStorageChild);
NS_ASSERT_OWNINGTHREAD(CacheStorageChild);
MOZ_DIAGNOSTIC_ASSERT(!mListener);
}
void CacheStorageChild::ClearListener() {
NS_ASSERT_OWNINGTHREAD(CacheStorageChild);
MOZ_DIAGNOSTIC_ASSERT(mListener);
mListener = nullptr;
}
void CacheStorageChild::StartDestroyFromListener() {
NS_ASSERT_OWNINGTHREAD(CacheStorageChild);
StartDestroy();
}
void CacheStorageChild::DestroyInternal() {
CacheStorageChildListener* listener = mListener;
// StartDestroy() can get called from either CacheStorage or the
// CacheWorkerRef.
// Theoretically we can get double called if the right race happens. Handle
// that by just ignoring the second StartDestroy() call.
if (!listener) {
return;
}
listener->OnActorDestroy(this);
// CacheStorage listener should call ClearListener() in OnActorDestroy()
MOZ_DIAGNOSTIC_ASSERT(!mListener);
// Start actor destruction from parent process
QM_WARNONLY_TRY(OkIf(SendTeardown()));
}
void CacheStorageChild::StartDestroy() {
NS_ASSERT_OWNINGTHREAD(CacheStorageChild);
if (NumChildActors() != 0) {
mDelayedDestroy = true;
return;
}
DestroyInternal();
}
void CacheStorageChild::NoteDeletedActor() {
// Check to see if DestroyInternal was delayed because of active CacheOpChilds
// when StartDestroy was called from WorkerRef notification. If the last
// CacheOpChild is getting destructed; it's the time for us to SendTearDown to
// the other side.
if (NumChildActors() == 0 && mDelayedDestroy) {
DestroyInternal();
}
}
void CacheStorageChild::ActorDestroy(ActorDestroyReason aReason) {
NS_ASSERT_OWNINGTHREAD(CacheStorageChild);
CacheStorageChildListener* listener = mListener;
if (listener) {
listener->OnActorDestroy(this);
// CacheStorage listener should call ClearListener() in OnActorDestroy()
MOZ_DIAGNOSTIC_ASSERT(!mListener);
}
if (mParentActor) {
mParentActor->NoteDeletedActor();
}
RemoveWorkerRef();
}
PCacheOpChild* CacheStorageChild::AllocPCacheOpChild(
const CacheOpArgs& aOpArgs) {
MOZ_CRASH("CacheOpChild should be manually constructed.");
return nullptr;
}
} // namespace mozilla::dom::cache
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