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// **********************************************************************
//
// Copyright (c) 2003-2016 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_METRICSFUNCTIONAL_H
#define ICE_METRICSFUNCTIONAL_H
namespace IceInternal
{
template<typename R> struct ReferenceWrapper
{
static R* get(const R& v)
{
return const_cast<R*>(&v);
}
};
template<typename R> struct ReferenceWrapper<IceInternal::ProxyHandle<R> >
{
static R* get(const IceInternal::ProxyHandle<R>& v)
{
return v.get();
}
};
template<typename R> struct ReferenceWrapper<const IceInternal::ProxyHandle<R>& >
{
static R* get(const IceInternal::ProxyHandle<R>& v)
{
return v.get();
}
};
template<typename R> struct ReferenceWrapper<IceInternal::Handle<R> >
{
static R* get(const IceInternal::Handle<R>& v)
{
return v.get();
}
};
template<typename R> struct ReferenceWrapper<const IceInternal::Handle<R>& >
{
static R* get(const IceInternal::Handle<R>& v)
{
return v.get();
}
};
template<typename R> struct ReferenceWrapper<R*>
{
static R* get(R* v)
{
return v;
}
};
template<typename R> struct ReferenceWrapper<const R&>
{
static R* get(const R& v)
{
return const_cast<R*>(&v);
}
};
};
namespace IceMX
{
template<class T, typename Y, typename Func> struct ApplyOnMember
{
ApplyOnMember(Y T::*member, Func func) : func(func), member(member)
{
}
template<typename R>
void operator()(const R& v)
{
func(IceInternal::ReferenceWrapper<R>::get(v)->*member);
}
Func func;
Y T::*member;
};
template<typename T> struct Decrement
{
void operator()(T& v)
{
--v;
}
};
template<typename T> struct Increment
{
void operator()(T& v)
{
++v;
}
};
template<typename T> struct Add
{
Add(T value) : value(value) { }
template<typename Y>
void operator()(Y& v)
{
v += value;
}
T value;
};
template<class T, typename Y, typename F> ApplyOnMember<T, Y, F> applyOnMember(Y T::*member, F func)
{
return ApplyOnMember<T, Y, F>(member, func);
}
template<class T, typename Y, typename V> ApplyOnMember<T, Y, Add<V> > add(Y T::*member, V value)
{
return applyOnMember(member, Add<V>(value));
}
template<class T, typename Y> ApplyOnMember<T, Y, Increment<Y> > inc(Y T::*member)
{
return applyOnMember(member, Increment<Y>());
}
template<class T, typename Y> ApplyOnMember<T, Y, Decrement<Y> > dec(Y T::*member)
{
return applyOnMember(member, Decrement<Y>());
}
}
#endif
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