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35bde55efd
FileCreatorHelper creates a FileBlobImpl on the main-thread and, because of this, we end up executing I/O operations on that thread, slowing down other components. With this patch, FileCreatorHelper logic is moved to PBackground. That the 'type' getter is still called on the main-thread because FileBlobImpl uses nsIMIMEService which is a non thread-safe component. Differential Revision: https://phabricator.services.mozilla.com/D27641 --HG-- extra : moz-landing-system : lando
55 lines
1.6 KiB
C++
55 lines
1.6 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "FileCreatorChild.h"
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#include "mozilla/dom/Promise.h"
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#include "mozilla/dom/IPCBlobUtils.h"
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namespace mozilla {
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namespace dom {
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FileCreatorChild::FileCreatorChild() = default;
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FileCreatorChild::~FileCreatorChild() { MOZ_ASSERT(!mPromise); }
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void FileCreatorChild::SetPromise(Promise* aPromise) {
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MOZ_ASSERT(aPromise);
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MOZ_ASSERT(!mPromise);
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mPromise = aPromise;
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}
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mozilla::ipc::IPCResult FileCreatorChild::Recv__delete__(
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const FileCreationResult& aResult) {
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MOZ_ASSERT(mPromise);
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RefPtr<Promise> promise;
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promise.swap(mPromise);
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if (aResult.type() == FileCreationResult::TFileCreationErrorResult) {
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promise->MaybeReject(aResult.get_FileCreationErrorResult().errorCode());
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return IPC_OK();
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}
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MOZ_ASSERT(aResult.type() == FileCreationResult::TFileCreationSuccessResult);
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RefPtr<dom::BlobImpl> impl = dom::IPCBlobUtils::Deserialize(
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aResult.get_FileCreationSuccessResult().blob());
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RefPtr<File> file = File::Create(promise->GetParentObject(), impl);
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promise->MaybeResolve(file);
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return IPC_OK();
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}
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void FileCreatorChild::ActorDestroy(ActorDestroyReason aWhy) {
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if (mPromise) {
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mPromise->MaybeReject(NS_ERROR_FAILURE);
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mPromise = nullptr;
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}
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};
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} // namespace dom
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} // namespace mozilla
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