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| 1 |
| 2 // Copyright 2017 The Chromium Authors. All rights reserved. |
| 3 // Use of this source code is governed by a BSD-style license that can be |
| 4 // found in the LICENSE file. |
| 5 |
| 6 #include "modules/indexeddb/IDBRequestQueue.h" |
| 7 |
| 8 #include "core/dom/DOMException.h" |
| 9 #include "modules/indexeddb/IDBKey.h" |
| 10 #include "modules/indexeddb/IDBRequest.h" |
| 11 #include "modules/indexeddb/IDBRequestLoader.h" |
| 12 #include "modules/indexeddb/IDBValue.h" |
| 13 #include "public/platform/modules/indexeddb/WebIDBCursor.h" |
| 14 |
| 15 namespace blink { |
| 16 |
| 17 IDBRequestQueueItem::IDBRequestQueueItem(IDBRequest* request, |
| 18 DOMException* error) |
| 19 : request_(request), error_(error), mode_(kError) {} |
| 20 |
| 21 IDBRequestQueueItem::IDBRequestQueueItem(IDBRequest* request, IDBKey* key) |
| 22 : request_(request), key_(key), mode_(kKey) {} |
| 23 |
| 24 IDBRequestQueueItem::IDBRequestQueueItem(IDBRequest* request, |
| 25 PassRefPtr<IDBValue> value) |
| 26 : request_(request), mode_(kValue) { |
| 27 values_.push_back(std::move(value)); |
| 28 } |
| 29 |
| 30 IDBRequestQueueItem::IDBRequestQueueItem(IDBRequest* request, |
| 31 const Vector<RefPtr<IDBValue>>& values) |
| 32 : request_(request), values_(values), mode_(kValueArray) {} |
| 33 |
| 34 IDBRequestQueueItem::IDBRequestQueueItem(IDBRequest* request, |
| 35 IDBKey* key, |
| 36 IDBKey* primary_key, |
| 37 PassRefPtr<IDBValue> value) |
| 38 : request_(request), |
| 39 key_(key), |
| 40 primary_key_(primary_key), |
| 41 mode_(kKeyPrimaryKeyValue) { |
| 42 values_.push_back(std::move(value)); |
| 43 } |
| 44 |
| 45 IDBRequestQueueItem::IDBRequestQueueItem(IDBRequest* request, |
| 46 std::unique_ptr<WebIDBCursor> backend, |
| 47 IDBKey* key, |
| 48 IDBKey* primary_key, |
| 49 PassRefPtr<IDBValue> value) |
| 50 : request_(request), |
| 51 key_(key), |
| 52 primary_key_(primary_key), |
| 53 backend_(std::move(backend)), |
| 54 mode_(kBackendKeyPrimaryKeyValue) { |
| 55 values_.push_back(std::move(value)); |
| 56 } |
| 57 |
| 58 void IDBRequestQueueItem::MarkReady() { |
| 59 DCHECK(!ready_); |
| 60 ready_ = true; |
| 61 |
| 62 request_->transaction()->OnResultReady(); |
| 63 } |
| 64 |
| 65 void IDBRequestQueueItem::MarkReady(DOMException* error) { |
| 66 DCHECK(!ready_); |
| 67 DCHECK(mode_ != kError); |
| 68 |
| 69 mode_ = kError; |
| 70 error_ = error; |
| 71 |
| 72 // This is not necessary, but releases non-trivial amounts of memory early. |
| 73 values_.clear(); |
| 74 |
| 75 MarkReady(); |
| 76 } |
| 77 |
| 78 void IDBRequestQueueItem::AttachLoader() { |
| 79 DCHECK(!loader_); |
| 80 DCHECK(!values_.IsEmpty()); |
| 81 DCHECK(IDBRequestLoader::NeedUnwrapping(values_)); |
| 82 |
| 83 ready_ = false; |
| 84 loader_ = new IDBRequestLoader(this, &values_); |
| 85 } |
| 86 |
| 87 void IDBRequestQueueItem::StartLoading() { |
| 88 if (loader_) { |
| 89 DCHECK(!ready_); |
| 90 loader_->Start(); |
| 91 } |
| 92 } |
| 93 |
| 94 void IDBRequestQueueItem::FireCallback() { |
| 95 #if DCHECK_IS_ON() |
| 96 DCHECK(ready_); |
| 97 DCHECK(!callback_fired_); |
| 98 callback_fired_ = true; |
| 99 #endif // DCHECK_IS_ON() |
| 100 |
| 101 switch (mode_) { |
| 102 case kError: |
| 103 DCHECK(error_); |
| 104 request_->OnError(error_); |
| 105 break; |
| 106 |
| 107 case kBackendKeyPrimaryKeyValue: |
| 108 DCHECK_EQ(values_.size(), 1U); |
| 109 request_->OnSuccess(std::move(backend_), key_, primary_key_, |
| 110 std::move(values_.front())); |
| 111 break; |
| 112 |
| 113 case kKeyPrimaryKeyValue: |
| 114 DCHECK_EQ(values_.size(), 1U); |
| 115 request_->OnSuccess(key_, primary_key_, std::move(values_.front())); |
| 116 break; |
| 117 |
| 118 case kKey: |
| 119 request_->OnSuccess(key_); |
| 120 break; |
| 121 |
| 122 case kValue: |
| 123 DCHECK_EQ(values_.size(), 1U); |
| 124 request_->OnSuccess(std::move(values_.front())); |
| 125 break; |
| 126 |
| 127 case kValueArray: |
| 128 request_->OnSuccess(values_); |
| 129 break; |
| 130 } |
| 131 } |
| 132 |
| 133 DEFINE_TRACE(IDBRequestQueueItem) { |
| 134 visitor->Trace(error_); |
| 135 visitor->Trace(loader_); |
| 136 visitor->Trace(request_); |
| 137 visitor->Trace(key_); |
| 138 visitor->Trace(primary_key_); |
| 139 } |
| 140 |
| 141 } // namespace blink |
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