mozilla-central/dom/fs/api/FileSystemSyncAccessHandle.cpp (file symbol)

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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 "FileSystemSyncAccessHandle.h"
#include "fs/FileSystemAsyncCopy.h"
#include "fs/FileSystemRequestHandler.h"
#include "mozilla/CheckedInt.h"
#include "mozilla/ErrorResult.h"
#include "mozilla/FixedBufferOutputStream.h"
#include "mozilla/MozPromise.h"
#include "mozilla/TaskQueue.h"
#include "mozilla/dom/FileSystemAccessHandleChild.h"
#include "mozilla/dom/FileSystemAccessHandleControlChild.h"
#include "mozilla/dom/FileSystemHandleBinding.h"
#include "mozilla/dom/FileSystemLog.h"
#include "mozilla/dom/FileSystemManager.h"
#include "mozilla/dom/FileSystemManagerChild.h"
#include "mozilla/dom/FileSystemSyncAccessHandleBinding.h"
#include "mozilla/dom/Promise.h"
#include "mozilla/dom/UnionTypes.h"
#include "mozilla/dom/WorkerCommon.h"
#include "mozilla/dom/WorkerPrivate.h"
#include "mozilla/dom/WorkerRef.h"
#include "mozilla/dom/fs/IPCRejectReporter.h"
#include "mozilla/dom/quota/QuotaCommon.h"
#include "mozilla/dom/quota/ResultExtensions.h"
#include "mozilla/dom/quota/TargetPtrHolder.h"
#include "mozilla/ipc/RandomAccessStreamUtils.h"
#include "nsNetCID.h"
#include "nsStringStream.h"
namespace mozilla::dom {
namespace {
using SizePromise = Int64Promise;
const auto CreateAndRejectSizePromise = CreateAndRejectInt64Promise;
} // namespace
FileSystemSyncAccessHandle::FileSystemSyncAccessHandle(
nsIGlobalObject* aGlobal, RefPtr<FileSystemManager>& aManager,
mozilla::ipc::RandomAccessStreamParams&& aStreamParams,
RefPtr<FileSystemAccessHandleChild> aActor,
RefPtr<FileSystemAccessHandleControlChild> aControlActor,
RefPtr<TaskQueue> aIOTaskQueue,
const fs::FileSystemEntryMetadata& aMetadata)
: mGlobal(aGlobal),
mManager(aManager),
mActor(std::move(aActor)),
mControlActor(std::move(aControlActor)),
mIOTaskQueue(std::move(aIOTaskQueue)),
mStreamParams(std::move(aStreamParams)),
mMetadata(aMetadata),
mState(State::Initial) {
LOG(("Created SyncAccessHandle %p", this));
// Connect with the actor directly in the constructor. This way the actor
// can call `FileSystemSyncAccessHandle::ClearActor` when we call
// `PFileSystemAccessHandleChild::Send__delete__` even when
// FileSystemSyncAccessHandle::Create fails, in which case the not yet
// fully constructed FileSystemSyncAccessHandle is being destroyed.
mActor->SetAccessHandle(this);
mControlActor->SetAccessHandle(this);
}
FileSystemSyncAccessHandle::~FileSystemSyncAccessHandle() {
MOZ_ASSERT(!mActor);
MOZ_ASSERT(IsClosed());
}
// static
Result<RefPtr<FileSystemSyncAccessHandle>, nsresult>
FileSystemSyncAccessHandle::Create(
nsIGlobalObject* aGlobal, RefPtr<FileSystemManager>& aManager,
mozilla::ipc::RandomAccessStreamParams&& aStreamParams,
mozilla::ipc::ManagedEndpoint<PFileSystemAccessHandleChild>&&
aAccessHandleChildEndpoint,
mozilla::ipc::Endpoint<PFileSystemAccessHandleControlChild>&&
aAccessHandleControlChildEndpoint,
const fs::FileSystemEntryMetadata& aMetadata) {
WorkerPrivate* const workerPrivate = GetCurrentThreadWorkerPrivate();
MOZ_ASSERT(workerPrivate);
auto accessHandleChild = MakeRefPtr<FileSystemAccessHandleChild>();
QM_TRY(MOZ_TO_RESULT(
aManager->ActorStrongRef()->BindPFileSystemAccessHandleEndpoint(
std::move(aAccessHandleChildEndpoint), accessHandleChild)));
auto accessHandleControlChild =
MakeRefPtr<FileSystemAccessHandleControlChild>();
aAccessHandleControlChildEndpoint.Bind(accessHandleControlChild,
workerPrivate->ControlEventTarget());
QM_TRY_UNWRAP(auto streamTransportService,
MOZ_TO_RESULT_GET_TYPED(nsCOMPtr<nsIEventTarget>,
MOZ_SELECT_OVERLOAD(do_GetService),
NS_STREAMTRANSPORTSERVICE_CONTRACTID));
RefPtr<TaskQueue> ioTaskQueue = TaskQueue::Create(
streamTransportService.forget(), "FileSystemSyncAccessHandle");
QM_TRY(MOZ_TO_RESULT(ioTaskQueue));
RefPtr<FileSystemSyncAccessHandle> result = new FileSystemSyncAccessHandle(
aGlobal, aManager, std::move(aStreamParams), std::move(accessHandleChild),
std::move(accessHandleControlChild), std::move(ioTaskQueue), aMetadata);
auto autoClose = MakeScopeExit([result] {
MOZ_ASSERT(result->mState == State::Initial);
result->mState = State::Closed;
result->mActor->SendClose();
});
workerPrivate->AssertIsOnWorkerThread();
RefPtr<StrongWorkerRef> workerRef = StrongWorkerRef::Create(
workerPrivate, "FileSystemSyncAccessHandle", [result]() {
if (result->IsOpen()) {
// We don't need to use the result, we just need to begin the closing
// process.
Unused << result->BeginClose();
}
});
QM_TRY(MOZ_TO_RESULT(workerRef));
autoClose.release();
result->mWorkerRef = std::move(workerRef);
result->mState = State::Open;
return result;
}
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(FileSystemSyncAccessHandle)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(FileSystemSyncAccessHandle)
NS_IMPL_CYCLE_COLLECTING_RELEASE_WITH_LAST_RELEASE(FileSystemSyncAccessHandle,
LastRelease())
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS(FileSystemSyncAccessHandle)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(FileSystemSyncAccessHandle)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mGlobal)
// Don't unlink mManager!
NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
if (tmp->IsOpen()) {
// We don't need to use the result, we just need to begin the closing
// process.
Unused << tmp->BeginClose();
}
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(FileSystemSyncAccessHandle)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mGlobal)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mManager)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
void FileSystemSyncAccessHandle::LastRelease() {
// We can't call `FileSystemSyncAccessHandle::Close` here because it may need
// to keep FileSystemSyncAccessHandle object alive which isn't possible when
// the object is about to be deleted. There are other mechanisms which ensure
// that the object is correctly closed before destruction. For example the
// object unlinking and the worker shutdown (we get notified about it via the
// callback passed to `StrongWorkerRef`) are used to close the object if it
// hasn't been closed yet.
if (mActor) {
PFileSystemAccessHandleChild::Send__delete__(mActor);
// `PFileSystemAccessHandleChild::Send__delete__` is supposed to call
// `FileSystemAccessHandleChild::ActorDestroy` which in turn calls
// `FileSystemSyncAccessHandle::ClearActor`, so `mActor` should be be null
// at this point.
MOZ_ASSERT(!mActor);
}
if (mControlActor) {
mControlActor->Close();
// `FileSystemAccessHandleControlChild::Close` is supposed to call
// `FileSystemAccessHandleControlChild::ActorDestroy` which in turn calls
// `FileSystemSyncAccessHandle::ClearControlActor`, so `mControlActor`
// should be be null at this point.
MOZ_ASSERT(!mControlActor);
}
}
void FileSystemSyncAccessHandle::ClearActor() {
MOZ_ASSERT(mActor);
mActor = nullptr;
}
void FileSystemSyncAccessHandle::ClearControlActor() {
// `mControlActor` is initialized in the constructor and this method is
// supposed to be called only once.
MOZ_ASSERT(mControlActor);
mControlActor = nullptr;
}
bool FileSystemSyncAccessHandle::IsOpen() const {
MOZ_ASSERT(mState != State::Initial);
return mState == State::Open;
}
bool FileSystemSyncAccessHandle::IsClosing() const {
MOZ_ASSERT(mState != State::Initial);
return mState == State::Closing;
}
bool FileSystemSyncAccessHandle::IsClosed() const {
MOZ_ASSERT(mState != State::Initial);
return mState == State::Closed;
}
RefPtr<BoolPromise> FileSystemSyncAccessHandle::BeginClose() {
MOZ_ASSERT(IsOpen());
mState = State::Closing;
InvokeAsync(mIOTaskQueue, __func__,
[selfHolder = quota::TargetPtrHolder(this)]() {
if (selfHolder->mStream) {
LOG(("%p: Closing", selfHolder->mStream.get()));
selfHolder->mStream->OutputStream()->Close();
selfHolder->mStream = nullptr;
} else {
LOG(("Closing (no stream)"));
// If the stream was not deserialized, `mStreamParams` still
// contains a pre-opened file descriptor which needs to be
// closed here by moving `mStreamParams` to a local variable
// (the file descriptor will be closed for real when
// `streamParams` goes out of scope).
mozilla::ipc::RandomAccessStreamParams streamParams(
std::move(selfHolder->mStreamParams));
}
return BoolPromise::CreateAndResolve(true, __func__);
})
->Then(mWorkerRef->Private()->ControlEventTarget(), __func__,
[self = RefPtr(this)](const BoolPromise::ResolveOrRejectValue&) {
return self->mIOTaskQueue->BeginShutdown();
})
->Then(
mWorkerRef->Private()->ControlEventTarget(), __func__,
[self = RefPtr(this)](const ShutdownPromise::ResolveOrRejectValue&) {
if (self->mControlActor) {
RefPtr<BoolPromise::Private> promise =
new BoolPromise::Private(__func__);
self->mControlActor->SendClose(
[promise](void_t&&) { promise->Resolve(true, __func__); },
[promise](const mozilla::ipc::ResponseRejectReason& aReason) {
fs::IPCRejectReporter(aReason);
promise->Reject(NS_ERROR_FAILURE, __func__);
});
return RefPtr<BoolPromise>(promise);
}
return BoolPromise::CreateAndResolve(true, __func__);
})
->Then(mWorkerRef->Private()->ControlEventTarget(), __func__,
[self = RefPtr(this)](const BoolPromise::ResolveOrRejectValue&) {
self->mWorkerRef = nullptr;
self->mState = State::Closed;
self->mClosePromiseHolder.ResolveIfExists(true, __func__);
});
return OnClose();
}
RefPtr<BoolPromise> FileSystemSyncAccessHandle::OnClose() {
MOZ_ASSERT(mState == State::Closing);
return mClosePromiseHolder.Ensure(__func__);
}
// WebIDL Boilerplate
nsIGlobalObject* FileSystemSyncAccessHandle::GetParentObject() const {
return mGlobal;
}
JSObject* FileSystemSyncAccessHandle::WrapObject(
JSContext* aCx, JS::Handle<JSObject*> aGivenProto) {
return FileSystemSyncAccessHandle_Binding::Wrap(aCx, this, aGivenProto);
}
// WebIDL Interface
uint64_t FileSystemSyncAccessHandle::Read(
const MaybeSharedArrayBufferViewOrMaybeSharedArrayBuffer& aBuffer,
const FileSystemReadWriteOptions& aOptions, ErrorResult& aRv) {
return ReadOrWrite(aBuffer, aOptions, /* aRead */ true, aRv);
}
uint64_t FileSystemSyncAccessHandle::Write(
const MaybeSharedArrayBufferViewOrMaybeSharedArrayBuffer& aBuffer,
const FileSystemReadWriteOptions& aOptions, ErrorResult& aRv) {
return ReadOrWrite(aBuffer, aOptions, /* aRead */ false, aRv);
}
void FileSystemSyncAccessHandle::Truncate(uint64_t aSize, ErrorResult& aError) {
if (!IsOpen()) {
aError.ThrowInvalidStateError("SyncAccessHandle is closed");
return;
}
MOZ_ASSERT(mWorkerRef);
AutoSyncLoopHolder syncLoop(mWorkerRef->Private(), Canceling);
nsCOMPtr<nsISerialEventTarget> syncLoopTarget =
syncLoop.GetSerialEventTarget();
QM_TRY(MOZ_TO_RESULT(syncLoopTarget), [&aError](nsresult) {
aError.ThrowInvalidStateError("Worker is shutting down");
});
InvokeAsync(
mIOTaskQueue, __func__,
[selfHolder = quota::TargetPtrHolder(this), aSize]() {
QM_TRY(MOZ_TO_RESULT(selfHolder->EnsureStream()),
CreateAndRejectBoolPromise);
LOG(("%p: Truncate to %" PRIu64, selfHolder->mStream.get(), aSize));
int64_t offset = 0;
QM_TRY(MOZ_TO_RESULT(selfHolder->mStream->Tell(&offset)),
CreateAndRejectBoolPromise);
QM_TRY(MOZ_TO_RESULT(selfHolder->mStream->Seek(
nsISeekableStream::NS_SEEK_SET, aSize)),
CreateAndRejectBoolPromise);
QM_TRY(MOZ_TO_RESULT(selfHolder->mStream->SetEOF()),
CreateAndRejectBoolPromise);
// restore cursor position (clamp to end of file)
QM_TRY(MOZ_TO_RESULT(selfHolder->mStream->Seek(
nsISeekableStream::NS_SEEK_SET,
std::min((uint64_t)offset, aSize))),
CreateAndRejectBoolPromise);
return BoolPromise::CreateAndResolve(true, __func__);
})
->Then(syncLoopTarget, __func__,
[this, &syncLoopTarget](
const BoolPromise::ResolveOrRejectValue& aValue) {
MOZ_ASSERT(mWorkerRef);
mWorkerRef->Private()->AssertIsOnWorkerThread();
mWorkerRef->Private()->StopSyncLoop(
syncLoopTarget,
aValue.IsResolve() ? NS_OK : aValue.RejectValue());
});
QM_TRY(MOZ_TO_RESULT(syncLoop.Run()),
[&aError](const nsresult rv) { aError.Throw(rv); });
}
uint64_t FileSystemSyncAccessHandle::GetSize(ErrorResult& aError) {
if (!IsOpen()) {
aError.ThrowInvalidStateError("SyncAccessHandle is closed");
return 0;
}
MOZ_ASSERT(mWorkerRef);
AutoSyncLoopHolder syncLoop(mWorkerRef->Private(), Canceling);
nsCOMPtr<nsISerialEventTarget> syncLoopTarget =
syncLoop.GetSerialEventTarget();
QM_TRY(MOZ_TO_RESULT(syncLoopTarget), [&aError](nsresult) {
aError.ThrowInvalidStateError("Worker is shutting down");
return 0;
});
// XXX Could we somehow pass the size to `StopSyncLoop` and then get it via
// `QM_TRY_INSPECT(const auto& size, syncLoop.Run)` ?
// Could we use Result<UniquePtr<...>, nsresult> for that ?
int64_t size;
InvokeAsync(mIOTaskQueue, __func__,
[selfHolder = quota::TargetPtrHolder(this)]() {
QM_TRY(MOZ_TO_RESULT(selfHolder->EnsureStream()),
CreateAndRejectSizePromise);
nsCOMPtr<nsIFileMetadata> fileMetadata =
do_QueryInterface(selfHolder->mStream);
MOZ_ASSERT(fileMetadata);
QM_TRY_INSPECT(
const auto& size,
MOZ_TO_RESULT_INVOKE_MEMBER(fileMetadata, GetSize),
CreateAndRejectSizePromise);
LOG(("%p: GetSize %" PRIu64, selfHolder->mStream.get(), size));
return SizePromise::CreateAndResolve(size, __func__);
})
->Then(syncLoopTarget, __func__,
[this, &syncLoopTarget,
&size](const Int64Promise::ResolveOrRejectValue& aValue) {
MOZ_ASSERT(mWorkerRef);
mWorkerRef->Private()->AssertIsOnWorkerThread();
if (aValue.IsResolve()) {
size = aValue.ResolveValue();
mWorkerRef->Private()->StopSyncLoop(syncLoopTarget, NS_OK);
} else {
mWorkerRef->Private()->StopSyncLoop(syncLoopTarget,
aValue.RejectValue());
}
});
QM_TRY(MOZ_TO_RESULT(syncLoop.Run()), [&aError](const nsresult rv) {
aError.Throw(rv);
return 0;
});
return size;
}
void FileSystemSyncAccessHandle::Flush(ErrorResult& aError) {
if (!IsOpen()) {
aError.ThrowInvalidStateError("SyncAccessHandle is closed");
return;
}
MOZ_ASSERT(mWorkerRef);
AutoSyncLoopHolder syncLoop(mWorkerRef->Private(), Canceling);
nsCOMPtr<nsISerialEventTarget> syncLoopTarget =
syncLoop.GetSerialEventTarget();
QM_TRY(MOZ_TO_RESULT(syncLoopTarget), [&aError](nsresult) {
aError.ThrowInvalidStateError("Worker is shutting down");
});
InvokeAsync(mIOTaskQueue, __func__,
[selfHolder = quota::TargetPtrHolder(this)]() {
QM_TRY(MOZ_TO_RESULT(selfHolder->EnsureStream()),
CreateAndRejectBoolPromise);
LOG(("%p: Flush", selfHolder->mStream.get()));
QM_TRY(
MOZ_TO_RESULT(selfHolder->mStream->OutputStream()->Flush()),
CreateAndRejectBoolPromise);
return BoolPromise::CreateAndResolve(true, __func__);
})
->Then(syncLoopTarget, __func__,
[this, &syncLoopTarget](
const BoolPromise::ResolveOrRejectValue& aValue) {
MOZ_ASSERT(mWorkerRef);
mWorkerRef->Private()->AssertIsOnWorkerThread();
mWorkerRef->Private()->StopSyncLoop(
syncLoopTarget,
aValue.IsResolve() ? NS_OK : aValue.RejectValue());
});
QM_TRY(MOZ_TO_RESULT(syncLoop.Run()),
[&aError](const nsresult rv) { aError.Throw(rv); });
}
void FileSystemSyncAccessHandle::Close() {
if (!(IsOpen() || IsClosing())) {
return;
}
MOZ_ASSERT(mWorkerRef);
// Normally mWorkerRef can be used directly for stopping the sync loop, but
// the async close is special because mWorkerRef is cleared as part of the
// operation. That's why we need to use this extra strong ref to the
// `StrongWorkerRef`.
RefPtr<StrongWorkerRef> workerRef = mWorkerRef;
AutoSyncLoopHolder syncLoop(workerRef->Private(), Killing);
nsCOMPtr<nsISerialEventTarget> syncLoopTarget =
syncLoop.GetSerialEventTarget();
MOZ_ASSERT(syncLoopTarget);
InvokeAsync(syncLoopTarget, __func__, [self = RefPtr(this)]() {
if (self->IsOpen()) {
return self->BeginClose();
}
return self->OnClose();
})->Then(syncLoopTarget, __func__, [&workerRef, &syncLoopTarget]() {
MOZ_ASSERT(workerRef);
workerRef->Private()->AssertIsOnWorkerThread();
workerRef->Private()->StopSyncLoop(syncLoopTarget, NS_OK);
});
MOZ_ALWAYS_SUCCEEDS(syncLoop.Run());
}
uint64_t FileSystemSyncAccessHandle::ReadOrWrite(
const MaybeSharedArrayBufferViewOrMaybeSharedArrayBuffer& aBuffer,
const FileSystemReadWriteOptions& aOptions, const bool aRead,
ErrorResult& aRv) {
if (!IsOpen()) {
aRv.ThrowInvalidStateError("SyncAccessHandle is closed");
return 0;
}
MOZ_ASSERT(mWorkerRef);
auto throwAndReturn = [&aRv](const nsresult rv) {
aRv.Throw(rv);
return 0;
};
// Handle seek before read ('at')
const auto at = [&aOptions]() -> uint64_t {
if (aOptions.mAt.WasPassed()) {
return aOptions.mAt.Value();
}
// Spec says default for at is 0 (2.6)
return 0;
}();
const auto offset = CheckedInt<int64_t>(at);
QM_TRY(MOZ_TO_RESULT(offset.isValid()), throwAndReturn);
AutoSyncLoopHolder syncLoop(mWorkerRef->Private(), Canceling);
nsCOMPtr<nsISerialEventTarget> syncLoopTarget =
syncLoop.GetSerialEventTarget();
QM_TRY(MOZ_TO_RESULT(syncLoopTarget), [&aRv](nsresult) {
aRv.ThrowInvalidStateError("Worker is shutting down");
return 0;
});
uint64_t totalCount = 0;
ProcessTypedArraysFixed(aBuffer, [&](const Span<uint8_t> aData) {
InvokeAsync(
mIOTaskQueue, __func__,
[selfHolder = quota::TargetPtrHolder(this), aData,
use_offset = aOptions.mAt.WasPassed(), offset, aRead, syncLoopTarget,
&totalCount]() {
QM_TRY(MOZ_TO_RESULT(selfHolder->EnsureStream()),
CreateAndRejectBoolPromise);
if (use_offset) {
LOG_VERBOSE(("%p: Seeking to %" PRIu64, selfHolder->mStream.get(),
offset.value()));
QM_TRY(MOZ_TO_RESULT(selfHolder->mStream->Seek(
nsISeekableStream::NS_SEEK_SET, offset.value())),
CreateAndRejectBoolPromise);
}
nsCOMPtr<nsIInputStream> inputStream;
nsCOMPtr<nsIOutputStream> outputStream;
if (aRead) {
LOG_VERBOSE(("%p: Reading %zu bytes", selfHolder->mStream.get(),
aData.Length()));
inputStream = selfHolder->mStream->InputStream();
outputStream =
FixedBufferOutputStream::Create(AsWritableChars(aData));
} else {
LOG_VERBOSE(("%p: Writing %zu bytes", selfHolder->mStream.get(),
aData.Length()));
QM_TRY(MOZ_TO_RESULT(NS_NewByteInputStream(
getter_AddRefs(inputStream), AsChars(aData),
NS_ASSIGNMENT_DEPEND)),
CreateAndRejectBoolPromise);
outputStream = selfHolder->mStream->OutputStream();
}
auto promiseHolder = MakeUnique<MozPromiseHolder<BoolPromise>>();
RefPtr<BoolPromise> promise = promiseHolder->Ensure(__func__);
QM_TRY(MOZ_TO_RESULT(fs::AsyncCopy(
inputStream, outputStream, GetCurrentSerialEventTarget(),
aRead ? NS_ASYNCCOPY_VIA_WRITESEGMENTS
: NS_ASYNCCOPY_VIA_READSEGMENTS,
/* aCloseSource */ !aRead, /* aCloseSink */ aRead,
[&totalCount](uint32_t count) { totalCount += count; },
[promiseHolder = std::move(promiseHolder)](nsresult rv) {
promiseHolder->ResolveIfExists(true, __func__);
})),
CreateAndRejectBoolPromise);
return promise;
})
->Then(syncLoopTarget, __func__,
[this, &syncLoopTarget](
const BoolPromise::ResolveOrRejectValue& aValue) {
MOZ_ASSERT(mWorkerRef);
mWorkerRef->Private()->AssertIsOnWorkerThread();
mWorkerRef->Private()->StopSyncLoop(syncLoopTarget, NS_OK);
});
MOZ_ALWAYS_SUCCEEDS(syncLoop.Run());
});
return totalCount;
}
nsresult FileSystemSyncAccessHandle::EnsureStream() {
if (!mStream) {
QM_TRY_UNWRAP(mStream, DeserializeRandomAccessStream(mStreamParams),
NS_ERROR_FAILURE);
mozilla::ipc::RandomAccessStreamParams streamParams(
std::move(mStreamParams));
}
return NS_OK;
}
} // namespace mozilla::dom