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/*
* Copyright (C) 2004, 2008, 2009 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef Protect_h
#define Protect_h
#include "Collector.h"
#include "JSValue.h"
namespace JSC {
inline void gcProtect(JSCell* val)
{
Heap::heap(val)->protect(val);
}
inline void gcUnprotect(JSCell* val)
{
Heap::heap(val)->unprotect(val);
}
inline void gcProtectNullTolerant(JSCell* val)
{
if (val)
gcProtect(val);
}
inline void gcUnprotectNullTolerant(JSCell* val)
{
if (val)
gcUnprotect(val);
}
inline void gcProtect(JSValue value)
{
if (value && value.isCell())
gcProtect(asCell(value));
}
inline void gcUnprotect(JSValue value)
{
if (value && value.isCell())
gcUnprotect(asCell(value));
}
// FIXME: Share more code with RefPtr template? The only differences are the ref/deref operation
// and the implicit conversion to raw pointer
template <class T> class ProtectedPtr {
public:
ProtectedPtr() : m_ptr(0) {}
ProtectedPtr(T* ptr);
ProtectedPtr(const ProtectedPtr&);
~ProtectedPtr();
template <class U> ProtectedPtr(const ProtectedPtr<U>&);
T* get() const { return m_ptr; }
operator T*() const { return m_ptr; }
operator JSValue() const { return JSValue(m_ptr); }
T* operator->() const { return m_ptr; }
operator bool() const { return m_ptr; }
bool operator!() const { return !m_ptr; }
ProtectedPtr& operator=(const ProtectedPtr&);
ProtectedPtr& operator=(T*);
private:
T* m_ptr;
};
class ProtectedJSValue {
public:
ProtectedJSValue() {}
ProtectedJSValue(JSValue value);
ProtectedJSValue(const ProtectedJSValue&);
~ProtectedJSValue();
template <class U> ProtectedJSValue(const ProtectedPtr<U>&);
JSValue get() const { return m_value; }
operator JSValue() const { return m_value; }
JSValue operator->() const { return m_value; }
operator bool() const { return m_value; }
bool operator!() const { return !m_value; }
ProtectedJSValue& operator=(const ProtectedJSValue&);
ProtectedJSValue& operator=(JSValue);
private:
JSValue m_value;
};
template <class T> inline ProtectedPtr<T>::ProtectedPtr(T* ptr)
: m_ptr(ptr)
{
gcProtectNullTolerant(m_ptr);
}
template <class T> inline ProtectedPtr<T>::ProtectedPtr(const ProtectedPtr& o)
: m_ptr(o.get())
{
gcProtectNullTolerant(m_ptr);
}
template <class T> inline ProtectedPtr<T>::~ProtectedPtr()
{
gcUnprotectNullTolerant(m_ptr);
}
template <class T> template <class U> inline ProtectedPtr<T>::ProtectedPtr(const ProtectedPtr<U>& o)
: m_ptr(o.get())
{
gcProtectNullTolerant(m_ptr);
}
template <class T> inline ProtectedPtr<T>& ProtectedPtr<T>::operator=(const ProtectedPtr<T>& o)
{
T* optr = o.m_ptr;
gcProtectNullTolerant(optr);
gcUnprotectNullTolerant(m_ptr);
m_ptr = optr;
return *this;
}
template <class T> inline ProtectedPtr<T>& ProtectedPtr<T>::operator=(T* optr)
{
gcProtectNullTolerant(optr);
gcUnprotectNullTolerant(m_ptr);
m_ptr = optr;
return *this;
}
inline ProtectedJSValue::ProtectedJSValue(JSValue value)
: m_value(value)
{
gcProtect(m_value);
}
inline ProtectedJSValue::ProtectedJSValue(const ProtectedJSValue& o)
: m_value(o.get())
{
gcProtect(m_value);
}
inline ProtectedJSValue::~ProtectedJSValue()
{
gcUnprotect(m_value);
}
template <class U> ProtectedJSValue::ProtectedJSValue(const ProtectedPtr<U>& o)
: m_value(o.get())
{
gcProtect(m_value);
}
inline ProtectedJSValue& ProtectedJSValue::operator=(const ProtectedJSValue& o)
{
JSValue ovalue = o.m_value;
gcProtect(ovalue);
gcUnprotect(m_value);
m_value = ovalue;
return *this;
}
inline ProtectedJSValue& ProtectedJSValue::operator=(JSValue ovalue)
{
gcProtect(ovalue);
gcUnprotect(m_value);
m_value = ovalue;
return *this;
}
template <class T> inline bool operator==(const ProtectedPtr<T>& a, const ProtectedPtr<T>& b) { return a.get() == b.get(); }
template <class T> inline bool operator==(const ProtectedPtr<T>& a, const T* b) { return a.get() == b; }
template <class T> inline bool operator==(const T* a, const ProtectedPtr<T>& b) { return a == b.get(); }
template <class T> inline bool operator!=(const ProtectedPtr<T>& a, const ProtectedPtr<T>& b) { return a.get() != b.get(); }
template <class T> inline bool operator!=(const ProtectedPtr<T>& a, const T* b) { return a.get() != b; }
template <class T> inline bool operator!=(const T* a, const ProtectedPtr<T>& b) { return a != b.get(); }
inline bool operator==(const ProtectedJSValue& a, const ProtectedJSValue& b) { return a.get() == b.get(); }
inline bool operator==(const ProtectedJSValue& a, const JSValue b) { return a.get() == b; }
template <class T> inline bool operator==(const ProtectedJSValue& a, const ProtectedPtr<T>& b) { return a.get() == JSValue(b.get()); }
inline bool operator==(const JSValue a, const ProtectedJSValue& b) { return a == b.get(); }
template <class T> inline bool operator==(const ProtectedPtr<T>& a, const ProtectedJSValue& b) { return JSValue(a.get()) == b.get(); }
inline bool operator!=(const ProtectedJSValue& a, const ProtectedJSValue& b) { return a.get() != b.get(); }
inline bool operator!=(const ProtectedJSValue& a, const JSValue b) { return a.get() != b; }
template <class T> inline bool operator!=(const ProtectedJSValue& a, const ProtectedPtr<T>& b) { return a.get() != JSValue(b.get()); }
inline bool operator!=(const JSValue a, const ProtectedJSValue& b) { return a != b.get(); }
template <class T> inline bool operator!=(const ProtectedPtr<T>& a, const ProtectedJSValue& b) { return JSValue(a.get()) != b.get(); }
} // namespace JSC
#endif // Protect_h
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