JavaScriptCore-7600.1.4.9.tar.gz

[apple/javascriptcore.git] / heap / DelayedReleaseScope.h

diff --git a/heap/DelayedReleaseScope.h b/heap/DelayedReleaseScope.h
new file mode 100644 (file)
index 0000000..883c661
--- /dev/null
+++ b/heap/DelayedReleaseScope.h
@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) 2013 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. 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 INC. 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.
+ */
+
+#ifndef DelayedReleaseScope_h
+#define DelayedReleaseScope_h
+
+#include "Heap.h"
+#include "JSLock.h"
+#include "MarkedSpace.h"
+
+namespace JSC {
+
+#if USE(CF)
+
+class DelayedReleaseScope {
+public:
+    DelayedReleaseScope(MarkedSpace& markedSpace)
+        : m_markedSpace(markedSpace)
+    {
+        ASSERT(!m_markedSpace.m_currentDelayedReleaseScope);
+        m_markedSpace.m_currentDelayedReleaseScope = this;
+    }
+
+    ~DelayedReleaseScope()
+    {
+        ASSERT(m_markedSpace.m_currentDelayedReleaseScope == this);
+        m_markedSpace.m_currentDelayedReleaseScope = nullptr;
+
+        HeapOperation operationInProgress = NoOperation;
+        std::swap(operationInProgress, m_markedSpace.m_heap->m_operationInProgress);
+
+        {
+            JSLock::DropAllLocks dropAllLocks(*m_markedSpace.m_heap->vm());
+            m_delayedReleaseObjects.clear();
+        }
+
+        std::swap(operationInProgress, m_markedSpace.m_heap->m_operationInProgress);
+    }
+
+    template <typename T>
+    void releaseSoon(RetainPtr<T>&& object)
+    {
+        m_delayedReleaseObjects.append(WTF::move(object));
+    }
+
+    static bool isInEffectFor(MarkedSpace& markedSpace)
+    {
+        return markedSpace.m_currentDelayedReleaseScope;
+    }
+
+private:
+    MarkedSpace& m_markedSpace;
+    Vector<RetainPtr<CFTypeRef>> m_delayedReleaseObjects;
+};
+
+template <typename T>
+inline void MarkedSpace::releaseSoon(RetainPtr<T>&& object)
+{
+    ASSERT(m_currentDelayedReleaseScope);
+    m_currentDelayedReleaseScope->releaseSoon(WTF::move(object));
+}
+
+#else // USE(CF)
+
+class DelayedReleaseScope {
+public:
+    DelayedReleaseScope(MarkedSpace&)
+    {
+    }
+
+    static bool isInEffectFor(MarkedSpace&)
+    {
+        return true;
+    }
+};
+
+#endif // USE(CF)
+
+} // namespace JSC
+
+#endif // DelayedReleaseScope_h