JavaScriptCore-1218.tar.gz

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

diff --git a/runtime/GCActivityCallbackBlackBerry.cpp b/runtime/GCActivityCallbackBlackBerry.cpp
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+++ b/runtime/GCActivityCallbackBlackBerry.cpp
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+/*
+ * Copyright (C) 2012 Research In Motion Limited. All rights reserved.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include "config.h"
+#include "GCActivityCallback.h"
+
+#include "Heap.h"
+#include "VM.h"
+#include <BlackBerryPlatformMemory.h>
+
+namespace JSC {
+
+DefaultGCActivityCallback::DefaultGCActivityCallback(Heap* heap)
+    : GCActivityCallback(heap->vm())
+{
+}
+
+void DefaultGCActivityCallback::doWork()
+{
+    JSLockHolder lock(m_vm);
+    m_vm->heap.collect(Heap::DoNotSweep);
+}
+
+void DefaultGCActivityCallback::didAllocate(size_t)
+{
+    if (m_timer.started())
+        return;
+
+    // Try using ~5% CPU time.
+    m_timer.start(m_vm->heap.lastGCLength() * 20);
+}
+
+void DefaultGCActivityCallback::willCollect()
+{
+    cancel();
+}
+
+void DefaultGCActivityCallback::cancel()
+{
+    m_timer.stop();
+}
+
+}