forked from mirrors/gecko-dev
0b28701943
Backed out changeset f1a65c9b3ca2 (bug 1682069) Backed out changeset 310d2116faf7 (bug 1679440) Backed out changeset f970ef0897cd (bug 1667276) Backed out changeset 38c20196aabc (bug 1667276) Backed out changeset 60c2f2dbc676 (bug 1667276) Backed out changeset cf52687c4433 (bug 1667276) Backed out changeset 74580a0f2633 (bug 1667276) Backed out changeset ab6f830f6e75 (bug 1667276)
132 lines
3.3 KiB
C++
132 lines
3.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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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#ifndef mozilla_BackgroundTasks_h
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#define mozilla_BackgroundTasks_h
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#include "nsCOMPtr.h"
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#include "nsIBackgroundTasks.h"
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#include "nsICommandLine.h"
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#include "nsIFile.h"
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#include "nsISupports.h"
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#include "nsString.h"
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#include "nsXULAppAPI.h"
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#include "mozilla/ClearOnShutdown.h"
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#include "mozilla/Maybe.h"
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#include "mozilla/StaticPtr.h"
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#include "mozilla/Unused.h"
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#include "prenv.h"
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namespace mozilla {
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class BackgroundTasks final : public nsIBackgroundTasks {
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSIBACKGROUNDTASKS
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public:
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explicit BackgroundTasks(Maybe<nsCString> aBackgroundTask)
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: mBackgroundTask(aBackgroundTask) {}
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static void Init(Maybe<nsCString> aBackgroundTask) {
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MOZ_RELEASE_ASSERT(XRE_IsParentProcess());
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MOZ_RELEASE_ASSERT(!sSingleton,
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"BackgroundTasks singleton already initialized");
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sSingleton = new BackgroundTasks(aBackgroundTask);
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ClearOnShutdown(&sSingleton);
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}
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static void Shutdown() {
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MOZ_RELEASE_ASSERT(XRE_IsParentProcess());
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if (!sSingleton) {
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return;
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}
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if (sSingleton->mProfD) {
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sSingleton->mProfD->Remove(/* aRecursive */ true);
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}
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sSingleton = nullptr;
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}
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/**
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* Return a raw pointer to the singleton instance. Use this accessor in C++
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* code that just wants to call a method on the instance, but does not need to
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* hold a reference.
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*/
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static BackgroundTasks* GetSingleton() {
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if (!sSingleton) {
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// xpcshell doesn't set up background tasks: default to no background
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// task.
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Init(Nothing());
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}
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MOZ_RELEASE_ASSERT(
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sSingleton, "BackgroundTasks singleton should have been initialized");
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return sSingleton.get();
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}
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/**
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* Return an addRef'd pointer to the singleton instance. This is used by the
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* XPCOM constructor that exists to support usage from JS.
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*/
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static already_AddRefed<BackgroundTasks> GetSingletonAddRefed() {
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return RefPtr<BackgroundTasks>(GetSingleton()).forget();
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}
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static const Maybe<nsCString> GetBackgroundTasks() {
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if (!XRE_IsParentProcess()) {
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return Nothing();
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}
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return GetSingleton()->mBackgroundTask;
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}
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static bool IsBackgroundTaskMode() {
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if (!XRE_IsParentProcess()) {
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return false;
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}
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return GetBackgroundTasks().isSome();
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}
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static nsresult GetOrCreateTemporaryProfileDirectory(nsIFile** aFile) {
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if (!XRE_IsParentProcess()) {
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return NS_ERROR_NOT_AVAILABLE;
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}
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return GetSingleton()->GetOrCreateTemporaryProfileDirectoryImpl(aFile);
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}
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static nsresult RunBackgroundTask(nsICommandLine* aCmdLine) {
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Maybe<nsCString> task = GetBackgroundTasks();
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if (task.isNothing()) {
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return NS_ERROR_NOT_AVAILABLE;
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}
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// For now, do nothing.
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return NS_OK;
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}
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protected:
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static StaticRefPtr<BackgroundTasks> sSingleton;
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Maybe<nsCString> mBackgroundTask;
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nsCOMPtr<nsIFile> mProfD;
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nsresult GetOrCreateTemporaryProfileDirectoryImpl(nsIFile** aFile);
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virtual ~BackgroundTasks() = default;
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};
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} // namespace mozilla
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#endif // mozilla_BackgroundTasks_h
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