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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 "webkit/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 "webkit/browser/blob/blob_storage_context.h" | |
12 #include "webkit/common/blob/blob_data.h" | |
13 | |
14 namespace webkit_blob { | |
15 | |
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 | |
25 BlobData* BlobDataHandle::BlobDataHandleShared::data() const { | |
26 return blob_data_; | |
27 } | |
28 | |
29 const std::string& BlobDataHandle::BlobDataHandleShared::uuid() const { | |
30 return blob_data_->uuid(); | |
31 } | |
32 | |
33 BlobDataHandle::BlobDataHandleShared::~BlobDataHandleShared() { | |
34 if (context_.get()) | |
35 context_->DecrementBlobRefCount(blob_data_->uuid()); | |
36 } | |
37 | |
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_); | |
44 DCHECK(io_task_runner_->RunsTasksOnCurrentThread()); | |
45 } | |
46 | |
47 BlobDataHandle::BlobDataHandle(const BlobDataHandle& other) { | |
48 io_task_runner_ = other.io_task_runner_; | |
49 shared_ = other.shared_; | |
50 } | |
51 | |
52 BlobDataHandle::~BlobDataHandle() { | |
53 BlobDataHandleShared* raw = shared_.get(); | |
54 raw->AddRef(); | |
55 shared_ = 0; | |
56 io_task_runner_->ReleaseSoon(FROM_HERE, raw); | |
57 } | |
58 | |
59 BlobData* BlobDataHandle::data() const { | |
60 DCHECK(io_task_runner_->RunsTasksOnCurrentThread()); | |
61 return shared_->data(); | |
62 } | |
63 | |
64 std::string BlobDataHandle::uuid() const { | |
65 return shared_->uuid(); | |
66 } | |
67 | |
68 } // namespace webkit_blob | |
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