/platform/external/webkit/WebCore/bindings/js/GCController.cpp

 1/*
 2 * Copyright (C) 2007 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#include "config.h"
27#include "GCController.h"
28
29#include "JSDOMWindow.h"
30#include <runtime/JSGlobalData.h>
31#include <runtime/JSLock.h>
32#include <runtime/Collector.h>
33#include <wtf/StdLibExtras.h>
34
35#if USE(PTHREADS)
36#include <pthread.h>
37#endif
38
39using namespace JSC;
40
41namespace WebCore {
42
43static void* collect(void*)
44{
45    JSLock lock(SilenceAssertionsOnly);
46    JSDOMWindow::commonJSGlobalData()->heap.collectAllGarbage();
47    return 0;
48}
49
50GCController& gcController()
51{
52    DEFINE_STATIC_LOCAL(GCController, staticGCController, ());
53    return staticGCController;
54}
55
56GCController::GCController()
57    : m_GCTimer(this, &GCController::gcTimerFired)
58{
59}
60
61void GCController::garbageCollectSoon()
62{
63    if (!m_GCTimer.isActive())
64        m_GCTimer.startOneShot(0.5);
65}
66
67void GCController::gcTimerFired(Timer<GCController>*)
68{
69    collect(0);
70}
71
72void GCController::garbageCollectNow()
73{
74    collect(0);
75}
76
77void GCController::garbageCollectOnAlternateThreadForDebugging(bool waitUntilDone)
78{
79#if USE(PTHREADS)
80    pthread_t thread;
81    pthread_create(&thread, NULL, collect, NULL);
82
83    if (waitUntilDone)
84        pthread_join(thread, NULL);
85#endif
86}
87
88} // namespace WebCore