1 files changed, 89 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/dfg/DFGSafepoint.h b/Source/JavaScriptCore/dfg/DFGSafepoint.h
new file mode 100644
index 000000000..96f4b8ecd
--- /dev/null
+++ b/Source/JavaScriptCore/dfg/DFGSafepoint.h
@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2014 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. ``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
+ * 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 DFGSafepoint_h
+#define DFGSafepoint_h
+
+#if ENABLE(DFG_JIT)
+
+#include <wtf/Vector.h>
+
+namespace JSC {
+
+class SlotVisitor;
+class VM;
+
+namespace DFG {
+
+class Scannable;
+struct Plan;
+
+class Safepoint {
+public:
+    class Result {
+    public:
+        Result()
+            : m_didGetCancelled(false)
+            , m_wasChecked(true)
+        {
+        }
+        
+        ~Result();
+        
+        bool didGetCancelled();
+        
+    private:
+        friend class Safepoint;
+        
+        bool m_didGetCancelled;
+        bool m_wasChecked;
+    };
+    
+    Safepoint(Plan&, Result&);
+    ~Safepoint();
+    
+    void add(Scannable*);
+    
+    void begin();
+    
+    void checkLivenessAndVisitChildren(SlotVisitor&);
+    bool isKnownToBeLiveDuringGC();
+    void cancel();
+    
+    VM& vm() const;
+
+private:
+    Plan& m_plan;
+    Vector<Scannable*> m_scannables;
+    bool m_didCallBegin;
+    Result& m_result;
+};
+
+} } // namespace JSC::DFG
+
+#endif // ENABLE(DFG_JIT)
+
+#endif // DFGSafepoint_h
+