/* | |
* Copyright (C) 2008 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. | |
* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of | |
* its contributors may be used to endorse or promote products derived | |
* from this software without specific prior written permission. | |
* | |
* THIS SOFTWARE IS PROVIDED BY APPLE 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 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 RegisterID_h | |
#define RegisterID_h | |
#include <wtf/Assertions.h> | |
#include <wtf/Noncopyable.h> | |
#include <wtf/VectorTraits.h> | |
namespace JSC { | |
class RegisterID : public Noncopyable { | |
public: | |
RegisterID() | |
: m_refCount(0) | |
, m_isTemporary(false) | |
#ifndef NDEBUG | |
, m_didSetIndex(false) | |
#endif | |
{ | |
} | |
explicit RegisterID(int index) | |
: m_refCount(0) | |
, m_index(index) | |
, m_isTemporary(false) | |
#ifndef NDEBUG | |
, m_didSetIndex(true) | |
#endif | |
{ | |
} | |
void setIndex(int index) | |
{ | |
ASSERT(!m_refCount); | |
#ifndef NDEBUG | |
m_didSetIndex = true; | |
#endif | |
m_index = index; | |
} | |
void setTemporary() | |
{ | |
m_isTemporary = true; | |
} | |
int index() const | |
{ | |
ASSERT(m_didSetIndex); | |
return m_index; | |
} | |
bool isTemporary() | |
{ | |
return m_isTemporary; | |
} | |
void ref() | |
{ | |
++m_refCount; | |
} | |
void deref() | |
{ | |
--m_refCount; | |
ASSERT(m_refCount >= 0); | |
} | |
int refCount() const | |
{ | |
return m_refCount; | |
} | |
private: | |
int m_refCount; | |
int m_index; | |
bool m_isTemporary; | |
#ifndef NDEBUG | |
bool m_didSetIndex; | |
#endif | |
}; | |
} // namespace JSC | |
namespace WTF { | |
template<> struct VectorTraits<JSC::RegisterID> : VectorTraitsBase<true, JSC::RegisterID> { | |
static const bool needsInitialization = true; | |
static const bool canInitializeWithMemset = true; // Default initialization just sets everything to 0 or false, so this is safe. | |
}; | |
} // namespace WTF | |
#endif // RegisterID_h |