JavaScriptCore-903.tar.gz

[apple/javascriptcore.git] / runtime / GCActivityCallbackCF.cpp

diff --git a/runtime/GCActivityCallbackCF.cpp b/runtime/GCActivityCallbackCF.cpp
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+/*
+ * Copyright (C) 2010 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1.  Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer. 
+ * 2.  Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution. 
+ * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ *     its contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "GCActivityCallback.h"
+
+#include "APIShims.h"
+#include "Heap.h"
+#include "JSGlobalData.h"
+#include "JSLock.h"
+#include "JSObject.h"
+#include "ScopeChain.h"
+#include <wtf/RetainPtr.h>
+#include <wtf/WTFThreadData.h>
+
+#if !USE(CF)
+#error "This file should only be used on CF platforms."
+#endif
+
+namespace JSC {
+
+struct DefaultGCActivityCallbackPlatformData {
+    static void trigger(CFRunLoopTimerRef, void *info);
+
+    RetainPtr<CFRunLoopTimerRef> timer;
+    RetainPtr<CFRunLoopRef> runLoop;
+    CFRunLoopTimerContext context;
+};
+
+const CFTimeInterval decade = 60 * 60 * 24 * 365 * 10;
+const CFTimeInterval triggerInterval = 2; // seconds
+
+void DefaultGCActivityCallbackPlatformData::trigger(CFRunLoopTimerRef timer, void *info)
+{
+    Heap* heap = static_cast<Heap*>(info);
+    APIEntryShim shim(heap->globalData());
+    heap->collectAllGarbage();
+    CFRunLoopTimerSetNextFireDate(timer, CFAbsoluteTimeGetCurrent() + decade);
+}
+
+DefaultGCActivityCallback::DefaultGCActivityCallback(Heap* heap)
+{
+    commonConstructor(heap, CFRunLoopGetCurrent());
+}
+
+DefaultGCActivityCallback::DefaultGCActivityCallback(Heap* heap, CFRunLoopRef runLoop)
+{
+    commonConstructor(heap, runLoop);
+}
+
+DefaultGCActivityCallback::~DefaultGCActivityCallback()
+{
+    CFRunLoopRemoveTimer(d->runLoop.get(), d->timer.get(), kCFRunLoopCommonModes);
+    CFRunLoopTimerInvalidate(d->timer.get());
+    d->context.info = 0;
+    d->runLoop = 0;
+    d->timer = 0;
+}
+
+void DefaultGCActivityCallback::commonConstructor(Heap* heap, CFRunLoopRef runLoop)
+{
+    d = adoptPtr(new DefaultGCActivityCallbackPlatformData);
+
+    memset(&d->context, 0, sizeof(CFRunLoopTimerContext));
+    d->context.info = heap;
+    d->runLoop = runLoop;
+    d->timer.adoptCF(CFRunLoopTimerCreate(0, decade, decade, 0, 0, DefaultGCActivityCallbackPlatformData::trigger, &d->context));
+    CFRunLoopAddTimer(d->runLoop.get(), d->timer.get(), kCFRunLoopCommonModes);
+}
+
+void DefaultGCActivityCallback::operator()()
+{
+    CFRunLoopTimerSetNextFireDate(d->timer.get(), CFAbsoluteTimeGetCurrent() + triggerInterval);
+}
+
+void DefaultGCActivityCallback::synchronize()
+{
+    if (CFRunLoopGetCurrent() == d->runLoop.get())
+        return;
+    CFRunLoopRemoveTimer(d->runLoop.get(), d->timer.get(), kCFRunLoopCommonModes);
+    d->runLoop = CFRunLoopGetCurrent();
+    CFRunLoopAddTimer(d->runLoop.get(), d->timer.get(), kCFRunLoopCommonModes);
+}
+
+}