| // Copyright (c) 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "storage/browser/blob/blob_data_handle.h" |
| |
| #include "base/bind.h" |
| #include "base/location.h" |
| #include "base/logging.h" |
| #include "base/sequenced_task_runner.h" |
| #include "storage/browser/blob/blob_data_snapshot.h" |
| #include "storage/browser/blob/blob_storage_context.h" |
| |
| namespace storage { |
| |
| BlobDataHandle::BlobDataHandleShared::BlobDataHandleShared( |
| const std::string& uuid, |
| BlobStorageContext* context, |
| base::SequencedTaskRunner* task_runner) |
| : uuid_(uuid), context_(context->AsWeakPtr()) { |
| context_->IncrementBlobRefCount(uuid); |
| } |
| |
| scoped_ptr<BlobDataSnapshot> |
| BlobDataHandle::BlobDataHandleShared::CreateSnapshot() const { |
| return context_->CreateSnapshot(uuid_).Pass(); |
| } |
| |
| const std::string& BlobDataHandle::BlobDataHandleShared::uuid() const { |
| return uuid_; |
| } |
| |
| BlobDataHandle::BlobDataHandleShared::~BlobDataHandleShared() { |
| if (context_.get()) |
| context_->DecrementBlobRefCount(uuid_); |
| } |
| |
| BlobDataHandle::BlobDataHandle(const std::string& uuid, |
| BlobStorageContext* context, |
| base::SequencedTaskRunner* task_runner) |
| : io_task_runner_(task_runner), |
| shared_(new BlobDataHandleShared(uuid, context, task_runner)) { |
| DCHECK(io_task_runner_.get()); |
| DCHECK(io_task_runner_->RunsTasksOnCurrentThread()); |
| } |
| |
| BlobDataHandle::BlobDataHandle(const BlobDataHandle& other) { |
| io_task_runner_ = other.io_task_runner_; |
| shared_ = other.shared_; |
| } |
| |
| BlobDataHandle::~BlobDataHandle() { |
| BlobDataHandleShared* raw = shared_.get(); |
| raw->AddRef(); |
| shared_ = nullptr; |
| io_task_runner_->ReleaseSoon(FROM_HERE, raw); |
| } |
| |
| scoped_ptr<BlobDataSnapshot> BlobDataHandle::CreateSnapshot() const { |
| DCHECK(io_task_runner_->RunsTasksOnCurrentThread()); |
| return shared_->CreateSnapshot().Pass(); |
| } |
| |
| const std::string& BlobDataHandle::uuid() const { |
| return shared_->uuid(); |
| } |
| |
| } // namespace storage |