android_external_webkit/JavaScriptCore/bytecompiler/RegisterID.h at froyo · Y6b/android_external_webkit · GitHub

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* 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

android_external_webkit/JavaScriptCore/bytecompiler/RegisterID.h at froyo · Y6b/android_external_webkit · GitHub

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