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/*
* 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
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