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1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "webkit/browser/blob/blob_data_handle.h" | 5 #include "webkit/browser/blob/blob_data_handle.h" |
6 | 6 |
7 #include "base/bind.h" | 7 #include "base/bind.h" |
8 #include "base/location.h" | 8 #include "base/location.h" |
9 #include "base/logging.h" | 9 #include "base/logging.h" |
10 #include "base/sequenced_task_runner.h" | 10 #include "base/sequenced_task_runner.h" |
11 #include "webkit/browser/blob/blob_storage_context.h" | 11 #include "webkit/browser/blob/blob_storage_context.h" |
12 #include "webkit/common/blob/blob_data.h" | 12 #include "webkit/common/blob/blob_data.h" |
13 | 13 |
14 namespace webkit_blob { | 14 namespace webkit_blob { |
15 | 15 |
16 BlobDataHandle::BlobDataHandleShared::BlobDataHandleShared( | 16 BlobDataHandle::BlobDataHandle(BlobData* blob_data, BlobStorageContext* context, |
17 BlobData* blob_data, | 17 base::SequencedTaskRunner* task_runner) |
18 BlobStorageContext* context, | |
19 base::SequencedTaskRunner* task_runner) | |
20 : blob_data_(blob_data), | 18 : blob_data_(blob_data), |
21 context_(context->AsWeakPtr()) { | 19 context_(context->AsWeakPtr()), |
| 20 io_task_runner_(task_runner) { |
| 21 // Ensures the uuid remains registered and the underlying data is not deleted. |
| 22 DCHECK(io_task_runner_->RunsTasksOnCurrentThread()); |
22 context_->IncrementBlobRefCount(blob_data->uuid()); | 23 context_->IncrementBlobRefCount(blob_data->uuid()); |
23 } | 24 blob_data_->AddRef(); |
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 } | 25 } |
51 | 26 |
52 BlobDataHandle::~BlobDataHandle() { | 27 BlobDataHandle::~BlobDataHandle() { |
53 BlobDataHandleShared* raw = shared_.get(); | 28 if (io_task_runner_->RunsTasksOnCurrentThread()) { |
54 raw->AddRef(); | 29 // Note: Do not test context_ or alter the blob_data_ refcount |
55 shared_ = 0; | 30 // on the wrong thread. |
56 io_task_runner_->ReleaseSoon(FROM_HERE, raw); | 31 if (context_.get()) |
| 32 context_->DecrementBlobRefCount(blob_data_->uuid()); |
| 33 blob_data_->Release(); |
| 34 return; |
| 35 } |
| 36 |
| 37 io_task_runner_->PostTask( |
| 38 FROM_HERE, |
| 39 base::Bind(&DeleteHelper, context_, base::Unretained(blob_data_))); |
57 } | 40 } |
58 | 41 |
59 BlobData* BlobDataHandle::data() const { | 42 BlobData* BlobDataHandle::data() const { |
60 DCHECK(io_task_runner_->RunsTasksOnCurrentThread()); | 43 DCHECK(io_task_runner_->RunsTasksOnCurrentThread()); |
61 return shared_->data(); | 44 return blob_data_; |
62 } | 45 } |
63 | 46 |
64 std::string BlobDataHandle::uuid() const { | 47 // static |
65 return shared_->uuid(); | 48 void BlobDataHandle::DeleteHelper( |
| 49 base::WeakPtr<BlobStorageContext> context, |
| 50 BlobData* blob_data) { |
| 51 if (context.get()) |
| 52 context->DecrementBlobRefCount(blob_data->uuid()); |
| 53 blob_data->Release(); |
66 } | 54 } |
67 | 55 |
68 } // namespace webkit_blob | 56 } // namespace webkit_blob |
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