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// **********************************************************************
//
// Copyright (c) 2003-2015 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;
//
// Flag constant used by the Shared class. Derived classes
// such as GCObject define more flag constants.
//
const unsigned char IceUtil::Shared::NoDelete = 1;
IceUtil::SimpleShared::SimpleShared() :
_ref(0),
_noDelete(false)
{
}
IceUtil::SimpleShared::SimpleShared(const SimpleShared&) :
_ref(0),
_noDelete(false)
{
}
IceUtil::Shared::Shared() :
_ref(0),
_flags(0)
{
}
IceUtil::Shared::Shared(const Shared&) :
_ref(0),
_flags(0)
{
}
void
IceUtil::Shared::__incRef()
{
#if defined(ICE_CPP11)
assert(_ref.fetch_add(0, std::memory_order_relaxed) >= 0);
++_ref;
#elif defined(_WIN32)
assert(InterlockedExchangeAdd(&_ref, 0) >= 0);
InterlockedIncrement(&_ref);
#elif defined(ICE_HAS_GCC_BUILTINS)
# ifndef NDEBUG
int c =
# endif
__sync_fetch_and_add(&_ref, 1);
assert(c >= 0);
#else
_mutex.lock();
assert(_ref >= 0);
++_ref;
_mutex.unlock();
#endif
}
void
IceUtil::Shared::__decRef()
{
#if defined(ICE_CPP11)
assert(_ref.fetch_add(0, std::memory_order_relaxed) > 0);
if(--_ref == 0 && !(_flags & NoDelete))
{
delete this;
}
#elif defined(_WIN32)
assert(InterlockedExchangeAdd(&_ref, 0) > 0);
if(InterlockedDecrement(&_ref) == 0 && !(_flags & NoDelete))
{
delete this;
}
#elif defined(ICE_HAS_GCC_BUILTINS)
int c = __sync_fetch_and_sub(&_ref, 1);
assert(c > 0);
if(c == 1 && !(_flags & NoDelete))
{
delete this;
}
#else
bool doDelete = false;
_mutex.lock();
assert(_ref > 0);
if(--_ref == 0)
{
doDelete = !(_flags & NoDelete);
_flags |= NoDelete;
}
_mutex.unlock();
if(doDelete)
{
delete this;
}
#endif
}
int
IceUtil::Shared::__getRef() const
{
#if defined(ICE_CPP11)
return _ref.load(std::memory_order_relaxed);
#elif defined(_WIN32)
return InterlockedExchangeAdd(const_cast<LONG*>(&_ref), 0);
#elif defined(ICE_HAS_GCC_BUILTINS)
return __sync_fetch_and_sub(const_cast<volatile int*>(&_ref), 0);
#else
_mutex.lock();
int ref = _ref;
_mutex.unlock();
return ref;
#endif
}
void
IceUtil::Shared::__setNoDelete(bool b)
{
_flags = b ? (_flags | NoDelete) : (_flags & ~NoDelete);
}
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