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
45 namespace JSC {
46
47 struct DefaultGCActivityCallbackPlatformData {
48 static void trigger(CFRunLoopTimerRef, void *info);
49
50 RetainPtr<CFRunLoopTimerRef> timer;
51 RetainPtr<CFRunLoopRef> runLoop;
52 CFRunLoopTimerContext context;
53 };
54
55 const CFTimeInterval decade = 60 * 60 * 24 * 365 * 10;
56 const CFTimeInterval triggerInterval = 2; // seconds
57
trigger(CFRunLoopTimerRef timer,void * info)58 void 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
DefaultGCActivityCallback(Heap * heap)66 DefaultGCActivityCallback::DefaultGCActivityCallback(Heap* heap)
67 {
68 commonConstructor(heap, CFRunLoopGetCurrent());
69 }
70
DefaultGCActivityCallback(Heap * heap,CFRunLoopRef runLoop)71 DefaultGCActivityCallback::DefaultGCActivityCallback(Heap* heap, CFRunLoopRef runLoop)
72 {
73 commonConstructor(heap, runLoop);
74 }
75
~DefaultGCActivityCallback()76 DefaultGCActivityCallback::~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
commonConstructor(Heap * heap,CFRunLoopRef runLoop)85 void 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
operator ()()96 void DefaultGCActivityCallback::operator()()
97 {
98 CFRunLoopTimerSetNextFireDate(d->timer.get(), CFAbsoluteTimeGetCurrent() + triggerInterval);
99 }
100
synchronize()101 void 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