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 <heap/Heap.h>
33 #include <wtf/StdLibExtras.h>
34
35 using namespace JSC;
36
37 namespace WebCore {
38
collect(void *)39 static void* collect(void*)
40 {
41 JSLock lock(SilenceAssertionsOnly);
42 JSDOMWindow::commonJSGlobalData()->heap.collectAllGarbage();
43 return 0;
44 }
45
gcController()46 GCController& gcController()
47 {
48 DEFINE_STATIC_LOCAL(GCController, staticGCController, ());
49 return staticGCController;
50 }
51
GCController()52 GCController::GCController()
53 : m_GCTimer(this, &GCController::gcTimerFired)
54 {
55 }
56
garbageCollectSoon()57 void GCController::garbageCollectSoon()
58 {
59 if (!m_GCTimer.isActive())
60 m_GCTimer.startOneShot(0);
61 }
62
gcTimerFired(Timer<GCController> *)63 void GCController::gcTimerFired(Timer<GCController>*)
64 {
65 collect(0);
66 }
67
garbageCollectNow()68 void GCController::garbageCollectNow()
69 {
70 JSLock lock(SilenceAssertionsOnly);
71 if (!JSDOMWindow::commonJSGlobalData()->heap.isBusy())
72 collect(0);
73 }
74
garbageCollectOnAlternateThreadForDebugging(bool waitUntilDone)75 void GCController::garbageCollectOnAlternateThreadForDebugging(bool waitUntilDone)
76 {
77 ThreadIdentifier threadID = createThread(collect, 0, "WebCore: GCController");
78
79 if (waitUntilDone) {
80 waitForThreadCompletion(threadID, 0);
81 return;
82 }
83
84 detachThread(threadID);
85 }
86
87 } // namespace WebCore
88