runtime/GCActivityCallbackCF.cpp

   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
  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
  66 DefaultGCActivityCallback::DefaultGCActivityCallback(Heap* heap)
  67 {
  68     commonConstructor(heap, CFRunLoopGetCurrent());
  69 }
  70
  71 DefaultGCActivityCallback::DefaultGCActivityCallback(Heap* heap, CFRunLoopRef runLoop)
  72 {
  73     commonConstructor(heap, runLoop);
  74 }
  75
  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
  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
  96 void DefaultGCActivityCallback::operator()()
  97 {
  98     CFRunLoopTimerSetNextFireDate(d->timer.get(), CFAbsoluteTimeGetCurrent() + triggerInterval);
  99 }
 100
 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 }