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1 /* | 1 /* |
2 * Copyright (C) 2010 Google Inc. All rights reserved. | 2 * Copyright (C) 2010 Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
6 * met: | 6 * met: |
7 * | 7 * |
8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
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24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
29 */ | 29 */ |
30 | 30 |
31 #ifndef ActiveDOMCallback_h | 31 #ifndef ActiveDOMCallback_h |
32 #define ActiveDOMCallback_h | 32 #define ActiveDOMCallback_h |
33 | 33 |
| 34 #include "ContextDestructionObserver.h" |
34 #include <wtf/OwnPtr.h> | 35 #include <wtf/OwnPtr.h> |
35 | 36 |
36 namespace WebCore { | 37 namespace WebCore { |
37 | 38 |
38 class ActiveDOMObjectCallbackImpl; | |
39 class ScriptExecutionContext; | 39 class ScriptExecutionContext; |
40 | 40 |
41 // A class that allows callbacks to behave like ActiveDOMObjects, and also | 41 // A base class that prevents binding callbacks from executing when |
42 // be destroyed on the context thread or any other thread. | 42 // active dom objects are stopped or suspended, and is used by the |
43 class ActiveDOMCallback { | 43 // generated callback v8 bindings code to avoid erroneously CRASH()'ing |
| 44 // after script execution on a worker has been terminated. |
| 45 // |
| 46 // Should only be created, used, and destroyed on the script execution |
| 47 // context thread. |
| 48 class ActiveDOMCallback : public ContextDestructionObserver { |
44 public: | 49 public: |
45 ActiveDOMCallback(ScriptExecutionContext* context); | 50 ActiveDOMCallback(ScriptExecutionContext* context); |
46 ~ActiveDOMCallback(); | 51 virtual ~ActiveDOMCallback(); |
47 | 52 |
48 bool canInvokeCallback() const; | 53 bool canInvokeCallback() const; |
49 ScriptExecutionContext* scriptExecutionContext() const; | 54 bool isScriptControllerTerminating() const; |
50 | |
51 private: | |
52 // The ActiveDOMObject part of the callback. | |
53 OwnPtr<ActiveDOMObjectCallbackImpl> m_impl; | |
54 }; | 55 }; |
55 | 56 |
56 } // namespace WebCore | 57 } // namespace WebCore |
57 | 58 |
58 #endif // ActiveDOMCallback_h | 59 #endif // ActiveDOMCallback_h |
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