Imported QtWebKit TP3 (git b57bc6801f1876c3220d5a4bfea33d620d477443)

Change-Id: I3b1d8a2808782c9f34d50240000e20cb38d3680f
Reviewed-by: Konstantin Tokarev <annulen@yandex.ru>

1 files changed, 111 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/dfg/DFGCompilationKey.h b/Source/JavaScriptCore/dfg/DFGCompilationKey.h
new file mode 100644
index 000000000..ff562a048
--- /dev/null
+++ b/Source/JavaScriptCore/dfg/DFGCompilationKey.h
@@ -0,0 +1,111 @@
+/*
+ * Copyright (C) 2013, 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 DFGCompilationKey_h
+#define DFGCompilationKey_h
+
+#include "DFGCompilationMode.h"
+#include <wtf/HashMap.h>
+
+namespace JSC {
+
+class CodeBlock;
+class CodeBlockSet;
+
+namespace DFG {
+
+class CompilationKey {
+public:
+    CompilationKey()
+        : m_profiledBlock(0)
+        , m_mode(InvalidCompilationMode)
+    {
+    }
+    
+    CompilationKey(WTF::HashTableDeletedValueType)
+        : m_profiledBlock(0)
+        , m_mode(DFGMode)
+    {
+    }
+    
+    CompilationKey(CodeBlock* profiledBlock, CompilationMode mode)
+        : m_profiledBlock(profiledBlock)
+        , m_mode(mode)
+    {
+    }
+    
+    bool operator!() const
+    {
+        return !m_profiledBlock && m_mode == InvalidCompilationMode;
+    }
+    
+    bool isHashTableDeletedValue() const
+    {
+        return !m_profiledBlock && m_mode != InvalidCompilationMode;
+    }
+    
+    CodeBlock* profiledBlock() const { return m_profiledBlock; }
+    CompilationMode mode() const { return m_mode; }
+    
+    bool operator==(const CompilationKey& other) const
+    {
+        return m_profiledBlock == other.m_profiledBlock
+            && m_mode == other.m_mode;
+    }
+    
+    unsigned hash() const
+    {
+        return WTF::pairIntHash(WTF::PtrHash<CodeBlock*>::hash(m_profiledBlock), m_mode);
+    }
+    
+    void dump(PrintStream&) const;
+
+private:
+    CodeBlock* m_profiledBlock;
+    CompilationMode m_mode;
+};
+
+struct CompilationKeyHash {
+    static unsigned hash(const CompilationKey& key) { return key.hash(); }
+    static bool equal(const CompilationKey& a, const CompilationKey& b) { return a == b; }
+    static const bool safeToCompareToEmptyOrDeleted = true;
+};
+
+} } // namespace JSC::DFG
+
+namespace WTF {
+
+template<typename T> struct DefaultHash;
+template<> struct DefaultHash<JSC::DFG::CompilationKey> {
+    typedef JSC::DFG::CompilationKeyHash Hash;
+};
+
+template<typename T> struct HashTraits;
+template<> struct HashTraits<JSC::DFG::CompilationKey> : SimpleClassHashTraits<JSC::DFG::CompilationKey> { };
+
+} // namespace WTF
+
+#endif // DFGCompilationKey_h
+