1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "storage/browser/blob/blob_data_handle.h"
6
7 #include "base/bind.h"
8 #include "base/location.h"
9 #include "base/logging.h"
10 #include "base/sequenced_task_runner.h"
11 #include "storage/browser/blob/blob_storage_context.h"
12 #include "storage/common/blob/blob_data.h"
13
14 namespace storage {
15
BlobDataHandleShared(BlobData * blob_data,BlobStorageContext * context,base::SequencedTaskRunner * task_runner)16 BlobDataHandle::BlobDataHandleShared::BlobDataHandleShared(
17 BlobData* blob_data,
18 BlobStorageContext* context,
19 base::SequencedTaskRunner* task_runner)
20 : blob_data_(blob_data),
21 context_(context->AsWeakPtr()) {
22 context_->IncrementBlobRefCount(blob_data->uuid());
23 }
24
data() const25 BlobData* BlobDataHandle::BlobDataHandleShared::data() const {
26 return blob_data_.get();
27 }
28
uuid() const29 const std::string& BlobDataHandle::BlobDataHandleShared::uuid() const {
30 return blob_data_->uuid();
31 }
32
~BlobDataHandleShared()33 BlobDataHandle::BlobDataHandleShared::~BlobDataHandleShared() {
34 if (context_.get())
35 context_->DecrementBlobRefCount(blob_data_->uuid());
36 }
37
BlobDataHandle(BlobData * blob_data,BlobStorageContext * context,base::SequencedTaskRunner * task_runner)38 BlobDataHandle::BlobDataHandle(BlobData* blob_data,
39 BlobStorageContext* context,
40 base::SequencedTaskRunner* task_runner)
41 : io_task_runner_(task_runner),
42 shared_(new BlobDataHandleShared(blob_data, context, task_runner)) {
43 DCHECK(io_task_runner_.get());
44 DCHECK(io_task_runner_->RunsTasksOnCurrentThread());
45 }
46
BlobDataHandle(const BlobDataHandle & other)47 BlobDataHandle::BlobDataHandle(const BlobDataHandle& other) {
48 io_task_runner_ = other.io_task_runner_;
49 shared_ = other.shared_;
50 }
51
~BlobDataHandle()52 BlobDataHandle::~BlobDataHandle() {
53 BlobDataHandleShared* raw = shared_.get();
54 raw->AddRef();
55 shared_ = 0;
56 io_task_runner_->ReleaseSoon(FROM_HERE, raw);
57 }
58
data() const59 BlobData* BlobDataHandle::data() const {
60 DCHECK(io_task_runner_->RunsTasksOnCurrentThread());
61 return shared_->data();
62 }
63
uuid() const64 std::string BlobDataHandle::uuid() const {
65 return shared_->uuid();
66 }
67
68 } // namespace storage
69