NS_IMETHODIMP _OldCacheEntryWrapper::AsyncDoom(nsICacheEntryDoomCallback* listener)
{
RefPtr<DoomCallbackWrapper> cb = listener
? new DoomCallbackWrapper(listener)
: nullptr;
return AsyncDoom(cb);
}
NS_IMETHODIMP CacheEntry::SetPredictedDataSize(int64_t aPredictedDataSize)
{
mPredictedDataSize = aPredictedDataSize;
if (CacheObserver::EntryIsTooBig(mPredictedDataSize, mUseDisk)) {
LOG(("CacheEntry::SetPredictedDataSize [this=%p] too big, dooming", this));
AsyncDoom(nullptr);
return NS_ERROR_FILE_TOO_BIG;
}
return NS_OK;
}
already_AddRefed<CacheEntryHandle> CacheEntry::ReopenTruncated(bool aMemoryOnly,
nsICacheEntryOpenCallback* aCallback)
{
LOG(("CacheEntry::ReopenTruncated [this=%p]", this));
mLock.AssertCurrentThreadOwns();
// Hold callbacks invocation, AddStorageEntry would invoke from doom prematurly
mPreventCallbacks = true;
nsRefPtr<CacheEntryHandle> handle;
nsRefPtr<CacheEntry> newEntry;
{
mozilla::MutexAutoUnlock unlock(mLock);
// The following call dooms this entry (calls DoomAlreadyRemoved on us)
nsresult rv = CacheStorageService::Self()->AddStorageEntry(
GetStorageID(), GetURI(), GetEnhanceID(),
mUseDisk && !aMemoryOnly,
true, // always create
true, // truncate existing (this one)
getter_AddRefs(handle));
if (NS_SUCCEEDED(rv)) {
newEntry = handle->Entry();
LOG((" exchanged entry %p by entry %p, rv=0x%08x", this, newEntry.get(), rv));
newEntry->AsyncOpen(aCallback, nsICacheStorage::OPEN_TRUNCATE);
} else {
LOG((" exchanged of entry %p failed, rv=0x%08x", this, rv));
AsyncDoom(nullptr);
}
}
mPreventCallbacks = false;
if (!newEntry)
return nullptr;
newEntry->TransferCallbacks(*this);
mCallbacks.Clear();
// Must return a new write handle, since the consumer is expected to
// write to this newly recreated entry. The |handle| is only a common
// reference counter and doesn't revert entry state back when write
// fails and also doesn't update the entry frecency. Not updating
// frecency causes entries to not be purged from our memory pools.
nsRefPtr<CacheEntryHandle> writeHandle =
newEntry->NewWriteHandle();
return writeHandle.forget();
}
already_AddRefed<CacheEntryHandle> CacheEntry::ReopenTruncated(bool aMemoryOnly,
nsICacheEntryOpenCallback* aCallback)
{
LOG(("CacheEntry::ReopenTruncated [this=%p]", this));
mLock.AssertCurrentThreadOwns();
// Hold callbacks invocation, AddStorageEntry would invoke from doom prematurly
mPreventCallbacks = true;
nsRefPtr<CacheEntryHandle> handle;
nsRefPtr<CacheEntry> newEntry;
{
mozilla::MutexAutoUnlock unlock(mLock);
// The following call dooms this entry (calls DoomAlreadyRemoved on us)
nsresult rv = CacheStorageService::Self()->AddStorageEntry(
GetStorageID(), GetURI(), GetEnhanceID(),
mUseDisk && !aMemoryOnly,
true, // always create
true, // truncate existing (this one)
getter_AddRefs(handle));
LOG((" exchanged entry %p by entry %p, rv=0x%08x", this, newEntry.get(), rv));
if (NS_SUCCEEDED(rv)) {
newEntry = handle->Entry();
newEntry->AsyncOpen(aCallback, nsICacheStorage::OPEN_TRUNCATE);
}
else {
AsyncDoom(nullptr);
}
}
mPreventCallbacks = false;
if (!newEntry)
return nullptr;
newEntry->TransferCallbacks(*this);
mCallbacks.Clear();
return handle.forget();
}
bool CacheEntry::Load(bool aTruncate, bool aPriority)
{
LOG(("CacheEntry::Load [this=%p, trunc=%d]", this, aTruncate));
mLock.AssertCurrentThreadOwns();
if (mState > LOADING) {
LOG((" already loaded"));
return false;
}
if (mState == LOADING) {
LOG((" already loading"));
return true;
}
mState = LOADING;
MOZ_ASSERT(!mFile);
nsresult rv;
nsAutoCString fileKey;
rv = HashingKeyWithStorage(fileKey);
// Check the index under two conditions for two states and take appropriate action:
// 1. When this is a disk entry and not told to truncate, check there is a disk file.
// If not, set the 'truncate' flag to true so that this entry will open instantly
// as a new one.
// 2. When this is a memory-only entry, check there is a disk file.
// If there is or could be, doom that file.
if ((!aTruncate || !mUseDisk) && NS_SUCCEEDED(rv)) {
// Check the index right now to know we have or have not the entry
// as soon as possible.
CacheIndex::EntryStatus status;
if (NS_SUCCEEDED(CacheIndex::HasEntry(fileKey, &status))) {
switch (status) {
case CacheIndex::DOES_NOT_EXIST:
LOG((" entry doesn't exist according information from the index, truncating"));
aTruncate = true;
break;
case CacheIndex::EXISTS:
case CacheIndex::DO_NOT_KNOW:
if (!mUseDisk) {
LOG((" entry open as memory-only, but there is (status=%d) a file, dooming it", status));
CacheFileIOManager::DoomFileByKey(fileKey, nullptr);
}
break;
}
}
}
mFile = new CacheFile();
BackgroundOp(Ops::REGISTER);
bool directLoad = aTruncate || !mUseDisk;
if (directLoad) {
// mLoadStart will be used to calculate telemetry of life-time of this entry.
// Low resulution is then enough.
mLoadStart = TimeStamp::NowLoRes();
} else {
mLoadStart = TimeStamp::Now();
}
{
mozilla::MutexAutoUnlock unlock(mLock);
LOG((" performing load, file=%p", mFile.get()));
if (NS_SUCCEEDED(rv)) {
rv = mFile->Init(fileKey,
aTruncate,
!mUseDisk,
aPriority,
directLoad ? nullptr : this);
}
if (NS_FAILED(rv)) {
mFileStatus = rv;
AsyncDoom(nullptr);
return false;
}
}
if (directLoad) {
// Just fake the load has already been done as "new".
mFileStatus = NS_OK;
mState = EMPTY;
}
return mState == LOADING;
}
