1/*
2 * Copyright (C) 2010 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 *
8 * 1.  Redistributions of source code must retain the above copyright
9 *     notice, this list of conditions and the following disclaimer.
10 * 2.  Redistributions in binary form must reproduce the above copyright
11 *     notice, this list of conditions and the following disclaimer in the
12 *     documentation and/or other materials provided with the distribution.
13 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
14 *     its contributors may be used to endorse or promote products derived
15 *     from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include "config.h"
30#include "GCActivityCallback.h"
31
32#include "APIShims.h"
33#include "Heap.h"
34#include "JSGlobalData.h"
35#include "JSLock.h"
36#include "JSObject.h"
37#include "ScopeChain.h"
38#include <wtf/RetainPtr.h>
39#include <wtf/WTFThreadData.h>
40
41#if !USE(CF)
42#error "This file should only be used on CF platforms."
43#endif
44
45namespace JSC {
46
47struct DefaultGCActivityCallbackPlatformData {
48    static void trigger(CFRunLoopTimerRef, void *info);
49
50    RetainPtr<CFRunLoopTimerRef> timer;
51    RetainPtr<CFRunLoopRef> runLoop;
52    CFRunLoopTimerContext context;
53};
54
55const CFTimeInterval decade = 60 * 60 * 24 * 365 * 10;
56const CFTimeInterval triggerInterval = 2; // seconds
57
58void DefaultGCActivityCallbackPlatformData::trigger(CFRunLoopTimerRef timer, void *info)
59{
60    Heap* heap = static_cast<Heap*>(info);
61    APIEntryShim shim(heap->globalData());
62    heap->collectAllGarbage();
63    CFRunLoopTimerSetNextFireDate(timer, CFAbsoluteTimeGetCurrent() + decade);
64}
65
66DefaultGCActivityCallback::DefaultGCActivityCallback(Heap* heap)
67{
68    commonConstructor(heap, CFRunLoopGetCurrent());
69}
70
71DefaultGCActivityCallback::DefaultGCActivityCallback(Heap* heap, CFRunLoopRef runLoop)
72{
73    commonConstructor(heap, runLoop);
74}
75
76DefaultGCActivityCallback::~DefaultGCActivityCallback()
77{
78    CFRunLoopRemoveTimer(d->runLoop.get(), d->timer.get(), kCFRunLoopCommonModes);
79    CFRunLoopTimerInvalidate(d->timer.get());
80    d->context.info = 0;
81    d->runLoop = 0;
82    d->timer = 0;
83}
84
85void DefaultGCActivityCallback::commonConstructor(Heap* heap, CFRunLoopRef runLoop)
86{
87    d = adoptPtr(new DefaultGCActivityCallbackPlatformData);
88
89    memset(&d->context, 0, sizeof(CFRunLoopTimerContext));
90    d->context.info = heap;
91    d->runLoop = runLoop;
92    d->timer.adoptCF(CFRunLoopTimerCreate(0, decade, decade, 0, 0, DefaultGCActivityCallbackPlatformData::trigger, &d->context));
93    CFRunLoopAddTimer(d->runLoop.get(), d->timer.get(), kCFRunLoopCommonModes);
94}
95
96void DefaultGCActivityCallback::operator()()
97{
98    CFRunLoopTimerSetNextFireDate(d->timer.get(), CFAbsoluteTimeGetCurrent() + triggerInterval);
99}
100
101void DefaultGCActivityCallback::synchronize()
102{
103    if (CFRunLoopGetCurrent() == d->runLoop.get())
104        return;
105    CFRunLoopRemoveTimer(d->runLoop.get(), d->timer.get(), kCFRunLoopCommonModes);
106    d->runLoop = CFRunLoopGetCurrent();
107    CFRunLoopAddTimer(d->runLoop.get(), d->timer.get(), kCFRunLoopCommonModes);
108}
109
110}
111