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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/CacheStreamControlParent.h"
#include "mozilla/UniquePtr.h"
#include "mozilla/Unused.h"
#include "mozilla/dom/cache/CacheTypes.h"
#include "mozilla/dom/cache/ReadStream.h"
#include "mozilla/dom/cache/StreamList.h"
#include "mozilla/ipc/IPCStreamUtils.h"
#include "mozilla/ipc/PBackgroundParent.h"
#include "nsISupportsImpl.h"
#include "nsTArray.h"
namespace mozilla::dom::cache {
using mozilla::ipc::FileDescriptor;
// declared in ActorUtils.h
void DeallocPCacheStreamControlParent(PCacheStreamControlParent* aActor) {
delete aActor;
}
CacheStreamControlParent::CacheStreamControlParent() {
MOZ_COUNT_CTOR(cache::CacheStreamControlParent);
}
CacheStreamControlParent::~CacheStreamControlParent() {
NS_ASSERT_OWNINGTHREAD(CacheStreamControlParent);
MOZ_DIAGNOSTIC_ASSERT(!mStreamList);
MOZ_COUNT_DTOR(cache::CacheStreamControlParent);
}
void CacheStreamControlParent::SerializeControl(
CacheReadStream* aReadStreamOut) {
NS_ASSERT_OWNINGTHREAD(CacheStreamControlParent);
MOZ_DIAGNOSTIC_ASSERT(aReadStreamOut);
aReadStreamOut->control() = this;
}
void CacheStreamControlParent::SerializeStream(CacheReadStream* aReadStreamOut,
nsIInputStream* aStream) {
NS_ASSERT_OWNINGTHREAD(CacheStreamControlParent);
MOZ_DIAGNOSTIC_ASSERT(aReadStreamOut);
DebugOnly<bool> ok = mozilla::ipc::SerializeIPCStream(
do_AddRef(aStream), aReadStreamOut->stream(), /* aAllowLazy */ false);
MOZ_ASSERT(ok);
}
void CacheStreamControlParent::OpenStream(const nsID& aId,
InputStreamResolver&& aResolver) {
NS_ASSERT_OWNINGTHREAD(CacheStreamControlParent);
MOZ_DIAGNOSTIC_ASSERT(aResolver);
if (!mStreamList || !mStreamList->ShouldOpenStreamFor(aId)) {
aResolver(nullptr);
return;
}
// Make sure to add ourself as a Listener even thought we are using
// a separate resolver function to signal the completion of the
// operation. The Manager uses the existence of the Listener to ensure
// that its safe to complete the operation.
mStreamList->GetManager().ExecuteOpenStream(this, std::move(aResolver), aId);
}
void CacheStreamControlParent::NoteClosedAfterForget(const nsID& aId) {
NS_ASSERT_OWNINGTHREAD(CacheStreamControlParent);
RecvNoteClosed(aId);
}
#ifdef DEBUG
void CacheStreamControlParent::AssertOwningThread() {
NS_ASSERT_OWNINGTHREAD(CacheStreamControlParent);
}
#endif
void CacheStreamControlParent::LostIPCCleanup(
SafeRefPtr<StreamList> aStreamList) {
NS_ASSERT_OWNINGTHREAD(CacheStreamControlParent);
CloseAllReadStreamsWithoutReporting();
// If the initial SendPStreamControlConstructor() fails we will
// be called before mStreamList is set.
if (!aStreamList) {
return;
}
aStreamList->GetManager().RemoveListener(this);
#ifdef MOZ_DIAGNOSTIC_ASSERT_ENABLED
aStreamList->GetManager().RecordHaveDeletedCSCP(Id());
#endif
aStreamList->RemoveStreamControl(this);
aStreamList->NoteClosedAll();
mStreamList = nullptr;
}
void CacheStreamControlParent::ActorDestroy(ActorDestroyReason aReason) {
LostIPCCleanup(std::move(mStreamList));
}
void CacheStreamControlParent::AssertWillDelete() {
#ifdef MOZ_DIAGNOSTIC_ASSERT_ENABLED
// If we cannot send, Send__delete__ will not do any cleanup.
// But if we are still unfreed, that might be wrong.
if (mStreamList && !CanSend()) {
MOZ_ASSERT(false, "Attempt to delete blocking CSCP that cannot send.");
mStreamList->GetManager().RecordMayNotDeleteCSCP(Id());
}
#endif
}
mozilla::ipc::IPCResult CacheStreamControlParent::RecvOpenStream(
const nsID& aStreamId, OpenStreamResolver&& aResolver) {
NS_ASSERT_OWNINGTHREAD(CacheStreamControlParent);
OpenStream(aStreamId, [aResolver, self = RefPtr{this}](
nsCOMPtr<nsIInputStream>&& aStream) {
Maybe<IPCStream> stream;
if (self->CanSend() &&
mozilla::ipc::SerializeIPCStream(aStream.forget(), stream,
/* aAllowLazy */ false)) {
aResolver(stream);
} else {
aResolver(Nothing());
}
});
return IPC_OK();
}
mozilla::ipc::IPCResult CacheStreamControlParent::RecvNoteClosed(
const nsID& aId) {
NS_ASSERT_OWNINGTHREAD(CacheStreamControlParent);
MOZ_DIAGNOSTIC_ASSERT(mStreamList);
mStreamList->NoteClosed(aId);
return IPC_OK();
}
void CacheStreamControlParent::SetStreamList(
SafeRefPtr<StreamList> aStreamList) {
NS_ASSERT_OWNINGTHREAD(CacheStreamControlParent);
MOZ_DIAGNOSTIC_ASSERT(!mStreamList);
mStreamList = std::move(aStreamList);
}
void CacheStreamControlParent::CloseAll() {
NS_ASSERT_OWNINGTHREAD(CacheStreamControlParent);
QM_WARNONLY_TRY(OkIf(SendCloseAll()));
// Attention: NotifyCloseAll potentially destroys our this synchronously!
NotifyCloseAll();
}
void CacheStreamControlParent::Shutdown() {
NS_ASSERT_OWNINGTHREAD(CacheStreamControlParent);
AssertWillDelete();
// If child process is gone, warn and allow actor to clean up normally
QM_WARNONLY_TRY(OkIf(Send__delete__(this)));
}
void CacheStreamControlParent::NotifyCloseAll() {
NS_ASSERT_OWNINGTHREAD(CacheStreamControlParent);
CloseAllReadStreams();
}
} // namespace mozilla::dom::cache
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