webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 110 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/profiler/ProfilerUID.h b/Source/JavaScriptCore/profiler/ProfilerUID.h
new file mode 100644
index 000000000..97dc3206a
--- /dev/null
+++ b/Source/JavaScriptCore/profiler/ProfilerUID.h
@@ -0,0 +1,110 @@
+/*
+ * Copyright (C) 2016 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. 
+ */
+
+#pragma once
+
+#include "JSCJSValue.h"
+#include <wtf/HashMap.h>
+#include <wtf/PrintStream.h>
+
+namespace JSC { namespace Profiler {
+
+class UID {
+public:
+    UID()
+        : m_uid(0)
+    {
+    }
+    
+    static UID fromInt(uint64_t value)
+    {
+        UID result;
+        result.m_uid = value;
+        return result;
+    }
+    
+    UID(WTF::HashTableDeletedValueType)
+        : m_uid(std::numeric_limits<uint64_t>::max())
+    {
+    }
+    
+    static UID create();
+    
+    uint64_t toInt() const
+    {
+        return m_uid;
+    }
+    
+    bool operator==(const UID& other) const
+    {
+        return m_uid == other.m_uid;
+    }
+    
+    bool operator!=(const UID& other) const
+    {
+        return !(*this == other);
+    }
+    
+    explicit operator bool() const
+    {
+        return *this != UID();
+    }
+    
+    bool isHashTableDeletedValue() const
+    {
+        return *this != UID(WTF::HashTableDeletedValue);
+    }
+    
+    unsigned hash() const
+    {
+        return IntHash<uint64_t>::hash(m_uid);
+    }
+    
+    void dump(PrintStream&) const;
+    JSValue toJS(ExecState*) const;
+    
+private:
+    uint64_t m_uid;
+};
+
+struct UIDHash {
+    static unsigned hash(const UID& key) { return key.hash(); }
+    static bool equal(const UID& a, const UID& b) { return a == b; }
+    static const bool safeToCompareToEmptyOrDeleted = true;
+};
+
+} } // namespace JSC::Profiler
+
+namespace WTF {
+
+template<typename T> struct DefaultHash;
+template<> struct DefaultHash<JSC::Profiler::UID> {
+    typedef JSC::Profiler::UIDHash Hash;
+};
+
+template<typename T> struct HashTraits;
+template<> struct HashTraits<JSC::Profiler::UID> : SimpleClassHashTraits<JSC::Profiler::UID> { };
+
+} // namespace WTF