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https://repo.dactyloidae.xyz/Dactyloidae/UXP.git
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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo
This commit is contained in:
Roy Tam
commit
dcd9973243
150858 changed files with 23884658 additions and 0 deletions
454
netwerk/cache/nsDeleteDir.cpp
vendored
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454
netwerk/cache/nsDeleteDir.cpp
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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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 "nsDeleteDir.h"
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#include "nsIFile.h"
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#include "nsString.h"
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#include "mozilla/Telemetry.h"
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#include "nsITimer.h"
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#include "nsISimpleEnumerator.h"
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#include "nsAutoPtr.h"
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#include "nsThreadUtils.h"
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#include "nsISupportsPriority.h"
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#include "nsCacheUtils.h"
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#include "prtime.h"
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#include <time.h>
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using namespace mozilla;
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class nsBlockOnBackgroundThreadEvent : public Runnable {
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public:
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nsBlockOnBackgroundThreadEvent() {}
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NS_IMETHOD Run() override
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{
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MutexAutoLock lock(nsDeleteDir::gInstance->mLock);
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nsDeleteDir::gInstance->mNotified = true;
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nsDeleteDir::gInstance->mCondVar.Notify();
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return NS_OK;
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}
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};
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nsDeleteDir * nsDeleteDir::gInstance = nullptr;
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nsDeleteDir::nsDeleteDir()
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: mLock("nsDeleteDir.mLock"),
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mCondVar(mLock, "nsDeleteDir.mCondVar"),
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mNotified(false),
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mShutdownPending(false),
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mStopDeleting(false)
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{
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NS_ASSERTION(gInstance==nullptr, "multiple nsCacheService instances!");
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}
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nsDeleteDir::~nsDeleteDir()
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{
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gInstance = nullptr;
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}
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nsresult
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nsDeleteDir::Init()
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{
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if (gInstance)
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return NS_ERROR_ALREADY_INITIALIZED;
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gInstance = new nsDeleteDir();
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return NS_OK;
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}
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nsresult
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nsDeleteDir::Shutdown(bool finishDeleting)
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{
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if (!gInstance)
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return NS_ERROR_NOT_INITIALIZED;
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nsCOMArray<nsIFile> dirsToRemove;
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nsCOMPtr<nsIThread> thread;
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{
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MutexAutoLock lock(gInstance->mLock);
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NS_ASSERTION(!gInstance->mShutdownPending,
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"Unexpected state in nsDeleteDir::Shutdown()");
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gInstance->mShutdownPending = true;
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if (!finishDeleting)
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gInstance->mStopDeleting = true;
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// remove all pending timers
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for (int32_t i = gInstance->mTimers.Count(); i > 0; i--) {
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nsCOMPtr<nsITimer> timer = gInstance->mTimers[i-1];
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gInstance->mTimers.RemoveObjectAt(i-1);
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nsCOMArray<nsIFile> *arg;
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timer->GetClosure((reinterpret_cast<void**>(&arg)));
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timer->Cancel();
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if (finishDeleting)
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dirsToRemove.AppendObjects(*arg);
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// delete argument passed to the timer
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delete arg;
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}
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thread.swap(gInstance->mThread);
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if (thread) {
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// dispatch event and wait for it to run and notify us, so we know thread
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// has completed all work and can be shutdown
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nsCOMPtr<nsIRunnable> event = new nsBlockOnBackgroundThreadEvent();
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nsresult rv = thread->Dispatch(event, NS_DISPATCH_NORMAL);
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if (NS_FAILED(rv)) {
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NS_WARNING("Failed dispatching block-event");
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return NS_ERROR_UNEXPECTED;
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}
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gInstance->mNotified = false;
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while (!gInstance->mNotified) {
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gInstance->mCondVar.Wait();
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}
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nsShutdownThread::BlockingShutdown(thread);
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}
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}
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delete gInstance;
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for (int32_t i = 0; i < dirsToRemove.Count(); i++)
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dirsToRemove[i]->Remove(true);
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return NS_OK;
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}
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nsresult
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nsDeleteDir::InitThread()
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{
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if (mThread)
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return NS_OK;
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nsresult rv = NS_NewNamedThread("Cache Deleter", getter_AddRefs(mThread));
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if (NS_FAILED(rv)) {
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NS_WARNING("Can't create background thread");
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return rv;
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}
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nsCOMPtr<nsISupportsPriority> p = do_QueryInterface(mThread);
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if (p) {
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p->SetPriority(nsISupportsPriority::PRIORITY_LOWEST);
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}
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return NS_OK;
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}
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void
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nsDeleteDir::DestroyThread()
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{
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if (!mThread)
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return;
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if (mTimers.Count())
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// more work to do, so don't delete thread.
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return;
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nsShutdownThread::Shutdown(mThread);
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mThread = nullptr;
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}
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void
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nsDeleteDir::TimerCallback(nsITimer *aTimer, void *arg)
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{
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Telemetry::AutoTimer<Telemetry::NETWORK_DISK_CACHE_DELETEDIR> timer;
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{
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MutexAutoLock lock(gInstance->mLock);
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int32_t idx = gInstance->mTimers.IndexOf(aTimer);
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if (idx == -1) {
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// Timer was canceled and removed during shutdown.
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return;
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}
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gInstance->mTimers.RemoveObjectAt(idx);
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}
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nsAutoPtr<nsCOMArray<nsIFile> > dirList;
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dirList = static_cast<nsCOMArray<nsIFile> *>(arg);
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bool shuttingDown = false;
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// Intentional extra braces to control variable sope.
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{
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// Low IO priority can only be set when running in the context of the
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// current thread. So this shouldn't be moved to where we set the priority
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// of the Cache deleter thread using the nsThread's NSPR priority constants.
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nsAutoLowPriorityIO autoLowPriority;
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for (int32_t i = 0; i < dirList->Count() && !shuttingDown; i++) {
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gInstance->RemoveDir((*dirList)[i], &shuttingDown);
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}
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}
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{
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MutexAutoLock lock(gInstance->mLock);
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gInstance->DestroyThread();
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}
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}
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nsresult
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nsDeleteDir::DeleteDir(nsIFile *dirIn, bool moveToTrash, uint32_t delay)
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{
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Telemetry::AutoTimer<Telemetry::NETWORK_DISK_CACHE_TRASHRENAME> timer;
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if (!gInstance)
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return NS_ERROR_NOT_INITIALIZED;
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nsresult rv;
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nsCOMPtr<nsIFile> trash, dir;
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// Need to make a clone of this since we don't want to modify the input
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// file object.
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rv = dirIn->Clone(getter_AddRefs(dir));
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if (NS_FAILED(rv))
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return rv;
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if (moveToTrash) {
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rv = GetTrashDir(dir, &trash);
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if (NS_FAILED(rv))
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return rv;
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nsAutoCString origLeaf;
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rv = trash->GetNativeLeafName(origLeaf);
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if (NS_FAILED(rv))
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return rv;
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// Append random number to the trash directory and check if it exists.
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srand(static_cast<unsigned>(PR_Now()));
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nsAutoCString leaf;
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for (int32_t i = 0; i < 10; i++) {
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leaf = origLeaf;
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leaf.AppendInt(rand());
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rv = trash->SetNativeLeafName(leaf);
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if (NS_FAILED(rv))
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return rv;
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bool exists;
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if (NS_SUCCEEDED(trash->Exists(&exists)) && !exists) {
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break;
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}
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leaf.Truncate();
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}
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// Fail if we didn't find unused trash directory within the limit
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if (!leaf.Length())
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return NS_ERROR_FAILURE;
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#if defined(MOZ_WIDGET_ANDROID)
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nsCOMPtr<nsIFile> parent;
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rv = trash->GetParent(getter_AddRefs(parent));
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if (NS_FAILED(rv))
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return rv;
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rv = dir->MoveToNative(parent, leaf);
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#else
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// Important: must rename directory w/o changing parent directory: else on
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// NTFS we'll wait (with cache lock) while nsIFile's ACL reset walks file
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// tree: was hanging GUI for *minutes* on large cache dirs.
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rv = dir->MoveToNative(nullptr, leaf);
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#endif
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if (NS_FAILED(rv))
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return rv;
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} else {
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// we want to pass a clone of the original off to the worker thread.
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trash.swap(dir);
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}
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nsAutoPtr<nsCOMArray<nsIFile> > arg(new nsCOMArray<nsIFile>);
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arg->AppendObject(trash);
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rv = gInstance->PostTimer(arg, delay);
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if (NS_FAILED(rv))
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return rv;
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arg.forget();
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return NS_OK;
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}
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nsresult
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nsDeleteDir::GetTrashDir(nsIFile *target, nsCOMPtr<nsIFile> *result)
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{
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nsresult rv;
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#if defined(MOZ_WIDGET_ANDROID)
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// Try to use the app cache folder for cache trash on Android
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char* cachePath = getenv("CACHE_DIRECTORY");
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if (cachePath) {
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rv = NS_NewNativeLocalFile(nsDependentCString(cachePath),
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true, getter_AddRefs(*result));
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if (NS_FAILED(rv))
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return rv;
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// Add a sub folder with the cache folder name
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nsAutoCString leaf;
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rv = target->GetNativeLeafName(leaf);
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(*result)->AppendNative(leaf);
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} else
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#endif
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{
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rv = target->Clone(getter_AddRefs(*result));
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}
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if (NS_FAILED(rv))
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return rv;
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nsAutoCString leaf;
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rv = (*result)->GetNativeLeafName(leaf);
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if (NS_FAILED(rv))
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return rv;
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leaf.AppendLiteral(".Trash");
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return (*result)->SetNativeLeafName(leaf);
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}
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nsresult
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nsDeleteDir::RemoveOldTrashes(nsIFile *cacheDir)
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{
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if (!gInstance)
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return NS_ERROR_NOT_INITIALIZED;
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nsresult rv;
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nsCOMPtr<nsIFile> trash;
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rv = GetTrashDir(cacheDir, &trash);
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if (NS_FAILED(rv))
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return rv;
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nsAutoString trashName;
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rv = trash->GetLeafName(trashName);
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if (NS_FAILED(rv))
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return rv;
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nsCOMPtr<nsIFile> parent;
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#if defined(MOZ_WIDGET_ANDROID)
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rv = trash->GetParent(getter_AddRefs(parent));
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#else
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rv = cacheDir->GetParent(getter_AddRefs(parent));
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#endif
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if (NS_FAILED(rv))
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return rv;
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nsCOMPtr<nsISimpleEnumerator> iter;
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rv = parent->GetDirectoryEntries(getter_AddRefs(iter));
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if (NS_FAILED(rv))
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return rv;
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bool more;
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nsCOMPtr<nsISupports> elem;
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nsAutoPtr<nsCOMArray<nsIFile> > dirList;
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while (NS_SUCCEEDED(iter->HasMoreElements(&more)) && more) {
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rv = iter->GetNext(getter_AddRefs(elem));
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if (NS_FAILED(rv))
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continue;
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nsCOMPtr<nsIFile> file = do_QueryInterface(elem);
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if (!file)
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continue;
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nsAutoString leafName;
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rv = file->GetLeafName(leafName);
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if (NS_FAILED(rv))
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continue;
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// match all names that begin with the trash name (i.e. "Cache.Trash")
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if (Substring(leafName, 0, trashName.Length()).Equals(trashName)) {
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if (!dirList)
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dirList = new nsCOMArray<nsIFile>;
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dirList->AppendObject(file);
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}
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}
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if (dirList) {
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rv = gInstance->PostTimer(dirList, 90000);
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if (NS_FAILED(rv))
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return rv;
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dirList.forget();
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}
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return NS_OK;
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}
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nsresult
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nsDeleteDir::PostTimer(void *arg, uint32_t delay)
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{
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nsresult rv;
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nsCOMPtr<nsITimer> timer = do_CreateInstance("@mozilla.org/timer;1", &rv);
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if (NS_FAILED(rv))
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return NS_ERROR_UNEXPECTED;
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MutexAutoLock lock(mLock);
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rv = InitThread();
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if (NS_FAILED(rv))
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return rv;
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rv = timer->SetTarget(mThread);
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if (NS_FAILED(rv))
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return rv;
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rv = timer->InitWithFuncCallback(TimerCallback, arg, delay,
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nsITimer::TYPE_ONE_SHOT);
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if (NS_FAILED(rv))
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return rv;
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mTimers.AppendObject(timer);
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return NS_OK;
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}
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nsresult
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nsDeleteDir::RemoveDir(nsIFile *file, bool *stopDeleting)
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{
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nsresult rv;
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bool isLink;
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rv = file->IsSymlink(&isLink);
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if (NS_FAILED(rv) || isLink)
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return NS_ERROR_UNEXPECTED;
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bool isDir;
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rv = file->IsDirectory(&isDir);
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if (NS_FAILED(rv))
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return rv;
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if (isDir) {
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nsCOMPtr<nsISimpleEnumerator> iter;
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rv = file->GetDirectoryEntries(getter_AddRefs(iter));
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if (NS_FAILED(rv))
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return rv;
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bool more;
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nsCOMPtr<nsISupports> elem;
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while (NS_SUCCEEDED(iter->HasMoreElements(&more)) && more) {
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rv = iter->GetNext(getter_AddRefs(elem));
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if (NS_FAILED(rv)) {
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NS_WARNING("Unexpected failure in nsDeleteDir::RemoveDir");
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continue;
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}
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nsCOMPtr<nsIFile> file2 = do_QueryInterface(elem);
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if (!file2) {
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NS_WARNING("Unexpected failure in nsDeleteDir::RemoveDir");
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continue;
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}
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RemoveDir(file2, stopDeleting);
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// No check for errors to remove as much as possible
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if (*stopDeleting)
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return NS_OK;
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}
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}
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file->Remove(false);
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// No check for errors to remove as much as possible
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MutexAutoLock lock(mLock);
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if (mStopDeleting)
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*stopDeleting = true;
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return NS_OK;
|
||||
}
|
||||
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