1 /*
2 * Copyright (C) 2010 Google 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 are
6 * met:
7 *
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 * * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.
29 */
30
31 #include "config.h"
32 #include "bindings/core/v8/V8GCForContextDispose.h"
33
34 #include "bindings/core/v8/V8PerIsolateData.h"
35 #include "wtf/StdLibExtras.h"
36 #include <v8.h>
37
38 namespace blink {
39
V8GCForContextDispose()40 V8GCForContextDispose::V8GCForContextDispose()
41 : m_pseudoIdleTimer(this, &V8GCForContextDispose::pseudoIdleTimerFired)
42 , m_didDisposeContextForMainFrame(false)
43 {
44 }
45
notifyContextDisposed(bool isMainFrame)46 void V8GCForContextDispose::notifyContextDisposed(bool isMainFrame)
47 {
48 m_didDisposeContextForMainFrame = isMainFrame;
49 V8PerIsolateData::mainThreadIsolate()->ContextDisposedNotification();
50 if (!m_didDisposeContextForMainFrame && !m_pseudoIdleTimer.isActive())
51 m_pseudoIdleTimer.startOneShot(0.8, FROM_HERE);
52 }
53
notifyIdleSooner(double maximumFireInterval)54 void V8GCForContextDispose::notifyIdleSooner(double maximumFireInterval)
55 {
56 if (!m_didDisposeContextForMainFrame && m_pseudoIdleTimer.isActive()) {
57 double nextFireInterval = m_pseudoIdleTimer.nextFireInterval();
58 if (nextFireInterval > maximumFireInterval) {
59 m_pseudoIdleTimer.stop();
60 m_pseudoIdleTimer.startOneShot(maximumFireInterval, FROM_HERE);
61 }
62 }
63 }
64
instanceTemplate()65 V8GCForContextDispose& V8GCForContextDispose::instanceTemplate()
66 {
67 DEFINE_STATIC_LOCAL(V8GCForContextDispose, staticInstance, ());
68 return staticInstance;
69 }
70
pseudoIdleTimerFired(Timer<V8GCForContextDispose> *)71 void V8GCForContextDispose::pseudoIdleTimerFired(Timer<V8GCForContextDispose>*)
72 {
73 const int idlePauseInMs = 10;
74 if (!m_didDisposeContextForMainFrame)
75 V8PerIsolateData::mainThreadIsolate()->IdleNotification(idlePauseInMs);
76 }
77
78 } // namespace blink
79