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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "FileInfo.h"
#include "FileManager.h"
#include "IndexedDatabaseManager.h"
#include "mozilla/Assertions.h"
#include "mozilla/Attributes.h"
#include "mozilla/Mutex.h"
#include "mozilla/dom/quota/QuotaManager.h"
#include "nsError.h"
#include "nsThreadUtils.h"
namespace mozilla {
namespace dom {
namespace indexedDB {
using namespace mozilla::dom::quota;
namespace {
template <typename IdType>
class FileInfoImpl final
: public FileInfo
{
IdType mFileId;
public:
FileInfoImpl(FileManager* aFileManager, IdType aFileId)
: FileInfo(aFileManager)
, mFileId(aFileId)
{
MOZ_ASSERT(aFileManager);
MOZ_ASSERT(aFileId > 0);
}
private:
~FileInfoImpl()
{ }
virtual int64_t
Id() const override
{
return int64_t(mFileId);
}
};
class CleanupFileRunnable final
: public Runnable
{
RefPtr<FileManager> mFileManager;
int64_t mFileId;
public:
static void
DoCleanup(FileManager* aFileManager, int64_t aFileId);
CleanupFileRunnable(FileManager* aFileManager, int64_t aFileId)
: mFileManager(aFileManager)
, mFileId(aFileId)
{
MOZ_ASSERT(aFileManager);
MOZ_ASSERT(aFileId > 0);
}
NS_DECL_ISUPPORTS_INHERITED
private:
~CleanupFileRunnable()
{ }
NS_DECL_NSIRUNNABLE
};
} // namespace
FileInfo::FileInfo(FileManager* aFileManager)
: mFileManager(aFileManager)
{
MOZ_ASSERT(aFileManager);
}
FileInfo::~FileInfo()
{
}
// static
FileInfo*
FileInfo::Create(FileManager* aFileManager, int64_t aId)
{
MOZ_ASSERT(aFileManager);
MOZ_ASSERT(aId > 0);
if (aId <= INT16_MAX) {
return new FileInfoImpl<int16_t>(aFileManager, aId);
}
if (aId <= INT32_MAX) {
return new FileInfoImpl<int32_t>(aFileManager, aId);
}
return new FileInfoImpl<int64_t>(aFileManager, aId);
}
void
FileInfo::GetReferences(int32_t* aRefCnt,
int32_t* aDBRefCnt,
int32_t* aSliceRefCnt)
{
MOZ_ASSERT(!IndexedDatabaseManager::IsClosed());
MutexAutoLock lock(IndexedDatabaseManager::FileMutex());
if (aRefCnt) {
*aRefCnt = mRefCnt;
}
if (aDBRefCnt) {
*aDBRefCnt = mDBRefCnt;
}
if (aSliceRefCnt) {
*aSliceRefCnt = mSliceRefCnt;
}
}
void
FileInfo::UpdateReferences(ThreadSafeAutoRefCnt& aRefCount,
int32_t aDelta,
CustomCleanupCallback* aCustomCleanupCallback)
{
// XXX This can go away once DOM objects no longer hold FileInfo objects...
// Looking at you, BlobImplBase...
// BlobImplBase is being addressed in bug 1068975.
if (IndexedDatabaseManager::IsClosed()) {
MOZ_ASSERT(&aRefCount == &mRefCnt);
MOZ_ASSERT(aDelta == 1 || aDelta == -1);
if (aDelta > 0) {
++aRefCount;
} else {
nsrefcnt count = --aRefCount;
if (!count) {
mRefCnt = 1;
delete this;
}
}
return;
}
MOZ_ASSERT(!IndexedDatabaseManager::IsClosed());
bool needsCleanup;
{
MutexAutoLock lock(IndexedDatabaseManager::FileMutex());
aRefCount = aRefCount + aDelta;
if (mRefCnt + mDBRefCnt + mSliceRefCnt > 0) {
return;
}
mFileManager->mFileInfos.Remove(Id());
needsCleanup = !mFileManager->Invalidated();
}
if (needsCleanup) {
if (aCustomCleanupCallback) {
nsresult rv = aCustomCleanupCallback->Cleanup(mFileManager, Id());
if (NS_FAILED(rv)) {
NS_WARNING("Custom cleanup failed!");
}
} else {
Cleanup();
}
}
delete this;
}
bool
FileInfo::LockedClearDBRefs()
{
MOZ_ASSERT(!IndexedDatabaseManager::IsClosed());
IndexedDatabaseManager::FileMutex().AssertCurrentThreadOwns();
mDBRefCnt = 0;
if (mRefCnt || mSliceRefCnt) {
return true;
}
// In this case, we are not responsible for removing the file info from the
// hashtable. It's up to FileManager which is the only caller of this method.
MOZ_ASSERT(mFileManager->Invalidated());
delete this;
return false;
}
void
FileInfo::Cleanup()
{
int64_t id = Id();
// IndexedDatabaseManager is main-thread only.
if (!NS_IsMainThread()) {
RefPtr<CleanupFileRunnable> cleaner =
new CleanupFileRunnable(mFileManager, id);
MOZ_ALWAYS_SUCCEEDS(NS_DispatchToMainThread(cleaner));
return;
}
CleanupFileRunnable::DoCleanup(mFileManager, id);
}
// static
void
CleanupFileRunnable::DoCleanup(FileManager* aFileManager, int64_t aFileId)
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aFileManager);
MOZ_ASSERT(aFileId > 0);
if (NS_WARN_IF(QuotaManager::IsShuttingDown())) {
return;
}
RefPtr<IndexedDatabaseManager> mgr = IndexedDatabaseManager::Get();
MOZ_ASSERT(mgr);
if (NS_FAILED(mgr->AsyncDeleteFile(aFileManager, aFileId))) {
NS_WARNING("Failed to delete file asynchronously!");
}
}
NS_IMPL_ISUPPORTS_INHERITED0(CleanupFileRunnable, Runnable)
NS_IMETHODIMP
CleanupFileRunnable::Run()
{
MOZ_ASSERT(NS_IsMainThread());
DoCleanup(mFileManager, mFileId);
return NS_OK;
}
} // namespace indexedDB
} // namespace dom
} // namespace mozilla
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