1 /*
2 * Copyright (C) 2008 Apple Inc. All Rights Reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 *
25 */
26
27 #include "config.h"
28 #include "core/dom/ActiveDOMObject.h"
29
30 #include "core/dom/ExecutionContext.h"
31
32 namespace WebCore {
33
ActiveDOMObject(ExecutionContext * executionContext)34 ActiveDOMObject::ActiveDOMObject(ExecutionContext* executionContext)
35 : ContextLifecycleObserver(executionContext, ActiveDOMObjectType)
36 , m_pendingActivityCount(0)
37 #if !ASSERT_DISABLED
38 , m_suspendIfNeededCalled(false)
39 #endif
40 {
41 ASSERT(!executionContext || executionContext->isContextThread());
42 }
43
~ActiveDOMObject()44 ActiveDOMObject::~ActiveDOMObject()
45 {
46 // ActiveDOMObject may be inherited by a sub-class whose life-cycle
47 // exceeds that of the associated ExecutionContext. In those cases,
48 // m_executionContext would/should have been nullified by
49 // ContextLifecycleObserver::contextDestroyed() (which we implement /
50 // inherit). Hence, we should ensure that this is not 0 before use it
51 // here.
52 if (!executionContext())
53 return;
54
55 ASSERT(m_suspendIfNeededCalled);
56 ASSERT(executionContext()->isContextThread());
57 }
58
suspendIfNeeded()59 void ActiveDOMObject::suspendIfNeeded()
60 {
61 #if !ASSERT_DISABLED
62 ASSERT(!m_suspendIfNeededCalled);
63 m_suspendIfNeededCalled = true;
64 #endif
65 if (ExecutionContext* context = executionContext())
66 context->suspendActiveDOMObjectIfNeeded(this);
67 }
68
hasPendingActivity() const69 bool ActiveDOMObject::hasPendingActivity() const
70 {
71 return m_pendingActivityCount;
72 }
73
suspend()74 void ActiveDOMObject::suspend()
75 {
76 }
77
resume()78 void ActiveDOMObject::resume()
79 {
80 }
81
stop()82 void ActiveDOMObject::stop()
83 {
84 }
85
86 } // namespace WebCore
87