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// **********************************************************************
//
// Copyright (c) 2003-2018 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************
#ifndef ICE_UNIQUE_REF_H
#define ICE_UNIQUE_REF_H
#ifdef __APPLE__
#include <CoreFoundation/CoreFoundation.h>
namespace IceInternal
{
//
// UniqueRef helper class for CoreFoundation classes, comparable to std::unique_ptr
//
template<typename R>
class UniqueRef
{
public:
explicit UniqueRef(R ref = 0) :
_ref(ref)
{
}
~UniqueRef()
{
if(_ref != 0)
{
CFRelease(_ref);
}
}
R release()
{
R r = _ref;
_ref = 0;
return r;
}
void reset(R ref = 0)
{
//
// Support "self-reset" for CF objects. This is useful if CF allocation methods return
// the same object with an increased reference count.
//
//assert(ref == 0 || ref != _ref);
if(_ref != 0)
{
CFRelease(_ref);
}
_ref = ref;
}
void retain(R ref)
{
reset(ref ? (R)CFRetain(ref) : ref);
}
R& get()
{
return _ref;
}
R get() const
{
return _ref;
}
operator bool() const
{
return _ref != 0;
}
void swap(UniqueRef& a)
{
R tmp = a._ref;
a._ref = _ref;
_ref = tmp;
}
private:
UniqueRef(UniqueRef&);
UniqueRef& operator=(UniqueRef&);
R _ref;
};
}
#endif
#endif
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