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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 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 #ifndef IncrementLoadEventDelayCount_h | 5 #ifndef IncrementLoadEventDelayCount_h |
6 #define IncrementLoadEventDelayCount_h | 6 #define IncrementLoadEventDelayCount_h |
7 | 7 |
8 #include <memory> | 8 #include <memory> |
| 9 #include "core/CoreExport.h" |
9 #include "platform/heap/Handle.h" | 10 #include "platform/heap/Handle.h" |
10 #include "platform/wtf/Allocator.h" | 11 #include "platform/wtf/Allocator.h" |
11 #include "platform/wtf/Noncopyable.h" | 12 #include "platform/wtf/Noncopyable.h" |
12 | 13 |
13 namespace blink { | 14 namespace blink { |
14 | 15 |
15 class Document; | 16 class Document; |
16 | 17 |
17 // A helper class that will increment a document's loadEventDelayCount on | 18 // A helper class that will increment a document's loadEventDelayCount on |
18 // contruction and decrement it on destruction (semantics similar to RefPtr). | 19 // contruction and decrement it on destruction (semantics similar to RefPtr). |
19 class IncrementLoadEventDelayCount { | 20 class CORE_EXPORT IncrementLoadEventDelayCount { |
20 USING_FAST_MALLOC(IncrementLoadEventDelayCount); | 21 USING_FAST_MALLOC(IncrementLoadEventDelayCount); |
21 WTF_MAKE_NONCOPYABLE(IncrementLoadEventDelayCount); | 22 WTF_MAKE_NONCOPYABLE(IncrementLoadEventDelayCount); |
22 | 23 |
23 public: | 24 public: |
24 static std::unique_ptr<IncrementLoadEventDelayCount> Create(Document&); | 25 static std::unique_ptr<IncrementLoadEventDelayCount> Create(Document&); |
25 ~IncrementLoadEventDelayCount(); | 26 ~IncrementLoadEventDelayCount(); |
26 | 27 |
27 // Decrements the loadEventDelayCount and checks load event synchronously, | 28 // Decrements the loadEventDelayCount and checks load event synchronously, |
28 // and thus can cause synchronous Document load event/JavaScript execution. | 29 // and thus can cause synchronous Document load event/JavaScript execution. |
29 // Call this only when it is safe, e.g. at the top of an async task. | 30 // Call this only when it is safe, e.g. at the top of an async task. |
30 // After calling this, |this| no longer blocks document's load event and | 31 // After calling this, |this| no longer blocks document's load event and |
31 // will not decrement loadEventDelayCount at destruction. | 32 // will not decrement loadEventDelayCount at destruction. |
32 void ClearAndCheckLoadEvent(); | 33 void ClearAndCheckLoadEvent(); |
33 | 34 |
34 // Increments the new document's count and decrements the old count. | 35 // Increments the new document's count and decrements the old count. |
35 void DocumentChanged(Document& new_document); | 36 void DocumentChanged(Document& new_document); |
36 | 37 |
37 private: | 38 private: |
38 IncrementLoadEventDelayCount(Document&); | 39 IncrementLoadEventDelayCount(Document&); |
39 Persistent<Document> document_; | 40 Persistent<Document> document_; |
40 }; | 41 }; |
41 } // namespace blink | 42 } // namespace blink |
42 | 43 |
43 #endif | 44 #endif |
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