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// **********************************************************************
//
// Copyright (c) 2003-2007 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.
//
// **********************************************************************
#include <IceUtil/Shared.h>
using namespace IceUtil;
IceUtil::SimpleShared::SimpleShared() :
_ref(0),
_noDelete(false)
{
}
IceUtil::SimpleShared::SimpleShared(const SimpleShared&) :
_ref(0),
_noDelete(false)
{
}
IceUtil::Shared::Shared() :
#ifndef ICE_HAS_ATOMIC_FUNCTIONS
_ref(0),
#endif
_noDelete(false)
{
#ifdef ICE_HAS_ATOMIC_FUNCTIONS
ice_atomic_set(&_ref, 0);
#endif
}
IceUtil::Shared::Shared(const Shared&) :
#ifndef ICE_HAS_ATOMIC_FUNCTIONS
_ref(0),
#endif
_noDelete(false)
{
#ifdef ICE_HAS_ATOMIC_FUNCTIONS
ice_atomic_set(&_ref, 0);
#endif
}
void
IceUtil::Shared::__incRef()
{
#if defined(_WIN32)
assert(InterlockedExchangeAdd(&_ref, 0) >= 0);
InterlockedIncrement(&_ref);
#elif defined(ICE_HAS_ATOMIC_FUNCTIONS)
assert(ice_atomic_exchange_add(0, &_ref) >= 0);
ice_atomic_inc(&_ref);
#else
_mutex.lock();
assert(_ref >= 0);
++_ref;
_mutex.unlock();
#endif
}
void
IceUtil::Shared::__decRef()
{
#if defined(_WIN32)
assert(InterlockedExchangeAdd(&_ref, 0) > 0);
if(InterlockedDecrement(&_ref) == 0 && !_noDelete)
{
_noDelete = true;
delete this;
}
#elif defined(ICE_HAS_ATOMIC_FUNCTIONS)
assert(ice_atomic_exchange_add(0, &_ref) > 0);
if(ice_atomic_dec_and_test(&_ref) && !_noDelete)
{
_noDelete = true;
delete this;
}
#else
_mutex.lock();
bool doDelete = false;
assert(_ref > 0);
if(--_ref == 0)
{
doDelete = !_noDelete;
_noDelete = true;
}
_mutex.unlock();
if(doDelete)
{
delete this;
}
#endif
}
int
IceUtil::Shared::__getRef() const
{
#if defined(_WIN32)
return InterlockedExchangeAdd(const_cast<LONG*>(&_ref), 0);
#elif defined(ICE_HAS_ATOMIC_FUNCTIONS)
return ice_atomic_exchange_add(0, const_cast<ice_atomic_t*>(&_ref));
#else
_mutex.lock();
int ref = _ref;
_mutex.unlock();
return ref;
#endif
}
void
IceUtil::Shared::__setNoDelete(bool b)
{
_noDelete = b;
}
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