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// **********************************************************************
//
// Copyright (c) 2003-2014 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_UTIL_SHARED_H
#define ICE_UTIL_SHARED_H
#include <IceUtil/Config.h>
#if defined(ICE_USE_MUTEX_SHARED)
# include <IceUtil/Mutex.h>
// Using the gcc builtins requires gcc 4.1 or better. For Linux, i386
// doesn't work. Apple is supported for all architectures. Sun only
// supports sparc (32 and 64 bit).
#elif ((defined(__GNUC__) && (((__GNUC__* 100) + __GNUC_MINOR__) >= 401)) || __clang__) && \
((defined(__sun) && (defined(__sparc) || defined(__sparcv9))) || \
defined(__APPLE__) || \
(defined(__linux) && \
(defined(__i486) || defined(__i586) || \
defined(__i686) || defined(__x86_64))))
# define ICE_HAS_GCC_BUILTINS
#elif (defined(__APPLE__) || defined(__linux) || defined(__FreeBSD__)) && (defined(__i386) || defined(__x86_64)) && !defined(__ICC)
# define ICE_HAS_ATOMIC_FUNCTIONS
#elif defined(_WIN32)
// Nothing to include
#else
// Use a simple mutex
# include <IceUtil/Mutex.h>
#endif
//
// Base classes for reference counted types. The IceUtil::Handle
// template can be used for smart pointers to types derived from these
// bases.
//
// IceUtil::SimpleShared
// =====================
//
// A non thread-safe base class for reference-counted types.
//
// IceUtil::Shared
// ===============
//
// A thread-safe base class for reference-counted types.
//
namespace IceUtil
{
class ICE_UTIL_API SimpleShared
{
public:
SimpleShared();
SimpleShared(const SimpleShared&);
virtual ~SimpleShared()
{
}
SimpleShared& operator=(const SimpleShared&)
{
return *this;
}
void __incRef()
{
assert(_ref >= 0);
++_ref;
}
void __decRef()
{
assert(_ref > 0);
if(--_ref == 0)
{
if(!_noDelete)
{
delete this;
}
}
}
int __getRef() const
{
return _ref;
}
void __setNoDelete(bool b)
{
_noDelete = b;
}
private:
int _ref;
bool _noDelete;
};
class ICE_UTIL_API Shared
{
public:
//
// Flag constant used by the Shared class. Derived classes
// such as GCObject define more flag constants.
//
static const unsigned char NoDelete;
Shared();
Shared(const Shared&);
virtual ~Shared()
{
}
Shared& operator=(const Shared&)
{
return *this;
}
virtual void __incRef();
virtual void __decRef();
virtual int __getRef() const;
virtual void __setNoDelete(bool);
void __setFlag(unsigned char flag)
{
_flags |= flag;
}
void __clearFlag(unsigned char flag)
{
_flags &= ~flag;
}
bool __hasFlag(unsigned char flag)
{
return (_flags & flag) > 0;
}
protected:
#if defined(_WIN32)
LONG _ref;
#elif defined(ICE_HAS_ATOMIC_FUNCTIONS) || defined(ICE_HAS_GCC_BUILTINS)
volatile int _ref;
#else
int _ref;
Mutex _mutex;
#endif
unsigned char _flags;
};
}
#endif
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