nsresult
ParentRunnable::OpenCacheFileForWrite()
{
AssertIsOnIOThread();
MOZ_ASSERT(mState == eReadyToReadMetadata);
MOZ_ASSERT(mOpenMode == eOpenForWrite);
mFileSize = mWriteParams.mSize;
// Kick out the oldest entry in the LRU queue in the metadata.
mModuleIndex = mMetadata.mEntries[Metadata::kLastEntry].mModuleIndex;
nsCOMPtr<nsIFile> file;
nsresult rv = GetCacheFile(mDirectory, mModuleIndex, getter_AddRefs(file));
NS_ENSURE_SUCCESS(rv, rv);
QuotaManager* qm = QuotaManager::Get();
MOZ_ASSERT(qm, "We are on the QuotaManager's IO thread");
// Create the QuotaObject before all file IO and keep it alive until caching
// completes to get maximum assertion coverage in QuotaManager against
// concurrent removal, etc.
mQuotaObject = qm->GetQuotaObject(quota::PERSISTENCE_TYPE_TEMPORARY, mGroup,
mOrigin, file);
NS_ENSURE_STATE(mQuotaObject);
if (!mQuotaObject->MaybeUpdateSize(mWriteParams.mSize,
/* aTruncate */ false)) {
// If the request fails, it might be because mOrigin is using too much
// space (MaybeUpdateSize will not evict our own origin since it is
// active). Try to make some space by evicting LRU entries until there is
// enough space.
EvictEntries(mDirectory, mGroup, mOrigin, mWriteParams.mSize, mMetadata);
if (!mQuotaObject->MaybeUpdateSize(mWriteParams.mSize,
/* aTruncate */ false)) {
mResult = JS::AsmJSCache_QuotaExceeded;
return NS_ERROR_FAILURE;
}
}
int32_t openFlags = PR_RDWR | PR_TRUNCATE | PR_CREATE_FILE;
rv = file->OpenNSPRFileDesc(openFlags, 0644, &mFileDesc);
NS_ENSURE_SUCCESS(rv, rv);
// Move the mModuleIndex's LRU entry to the recent end of the queue.
PodMove(mMetadata.mEntries + 1, mMetadata.mEntries, Metadata::kLastEntry);
Metadata::Entry& entry = mMetadata.mEntries[0];
entry.mFastHash = mWriteParams.mFastHash;
entry.mNumChars = mWriteParams.mNumChars;
entry.mFullHash = mWriteParams.mFullHash;
entry.mModuleIndex = mModuleIndex;
rv = WriteMetadataFile(mMetadataFile, mMetadata);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
nsresult
ParentRunnable::OpenCacheFileForRead()
{
AssertIsOnIOThread();
MOZ_ASSERT(mState == eReadyToOpenCacheFileForRead);
MOZ_ASSERT(mOpenMode == eOpenForRead);
nsCOMPtr<nsIFile> file;
nsresult rv = GetCacheFile(mDirectory, mModuleIndex, getter_AddRefs(file));
NS_ENSURE_SUCCESS(rv, rv);
QuotaManager* qm = QuotaManager::Get();
MOZ_ASSERT(qm, "We are on the QuotaManager's IO thread");
// Even though it's not strictly necessary, create the QuotaObject before all
// file IO and keep it alive until caching completes to get maximum assertion
// coverage in QuotaManager against concurrent removal, etc.
mQuotaObject = qm->GetQuotaObject(quota::PERSISTENCE_TYPE_TEMPORARY, mGroup,
mOrigin, file);
NS_ENSURE_STATE(mQuotaObject);
rv = file->GetFileSize(&mFileSize);
NS_ENSURE_SUCCESS(rv, rv);
int32_t openFlags = PR_RDONLY | nsIFile::OS_READAHEAD;
rv = file->OpenNSPRFileDesc(openFlags, 0644, &mFileDesc);
NS_ENSURE_SUCCESS(rv, rv);
// Move the mModuleIndex's LRU entry to the recent end of the queue.
unsigned lruIndex = 0;
while (mMetadata.mEntries[lruIndex].mModuleIndex != mModuleIndex) {
if (++lruIndex == Metadata::kNumEntries) {
return NS_ERROR_UNEXPECTED;
}
}
Metadata::Entry entry = mMetadata.mEntries[lruIndex];
PodMove(mMetadata.mEntries + 1, mMetadata.mEntries, lruIndex);
mMetadata.mEntries[0] = entry;
rv = WriteMetadataFile(mMetadataFile, mMetadata);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
nsresult
FileQuotaStream<FileStreamBase>::DoOpen()
{
QuotaManager* quotaManager = QuotaManager::Get();
NS_ASSERTION(quotaManager, "Shouldn't be null!");
NS_ASSERTION(!mQuotaObject, "Creating quota object more than once?");
mQuotaObject = quotaManager->GetQuotaObject(mPersistenceType, mGroup, mOrigin,
FileStreamBase::mOpenParams.localFile);
nsresult rv = FileStreamBase::DoOpen();
NS_ENSURE_SUCCESS(rv, rv);
if (mQuotaObject && (FileStreamBase::mOpenParams.ioFlags & PR_TRUNCATE)) {
mQuotaObject->MaybeUpdateSize(0, /* aTruncate */ true);
}
return NS_OK;
}