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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#ifndef INCLUDED_TOOLS_LINK_HXX
#define INCLUDED_TOOLS_LINK_HXX
#include <sal/config.h>
#include <sal/types.h>
#define DECL_LINK(Member, ArgType, RetType) \
static RetType LinkStub##Member(void *, ArgType); \
RetType Member(ArgType)
#define DECL_STATIC_LINK(Class, Member, ArgType, RetType) \
static RetType LinkStub##Member(void *, ArgType); \
static RetType Member(Class *, ArgType)
#define DECL_DLLPRIVATE_LINK(Member, ArgType, RetType) \
SAL_DLLPRIVATE static RetType LinkStub##Member(void *, ArgType); \
SAL_DLLPRIVATE RetType Member(ArgType)
#define DECL_DLLPRIVATE_STATIC_LINK(Class, Member, ArgType, RetType) \
SAL_DLLPRIVATE static RetType LinkStub##Member(void *, ArgType); \
SAL_DLLPRIVATE static RetType Member(Class *, ArgType)
#define IMPL_LINK(Class, Member, ArgType, ArgName, RetType) \
RetType Class::LinkStub##Member(void * instance, ArgType data) { \
return static_cast<Class *>(instance)->Member(data); \
} \
RetType Class::Member(ArgType ArgName)
#define IMPL_LINK_NOARG(Class, Member, ArgType, RetType) \
RetType Class::LinkStub##Member(void * instance, ArgType data) { \
return static_cast<Class *>(instance)->Member(data); \
} \
RetType Class::Member(SAL_UNUSED_PARAMETER ArgType)
#define IMPL_STATIC_LINK( \
Class, Member, ArgType, ArgName, RetType) \
RetType Class::LinkStub##Member(void * instance, ArgType data) { \
return Member(static_cast<Class *>(instance), data); \
} \
RetType Class::Member(SAL_UNUSED_PARAMETER Class *, ArgType ArgName)
#define IMPL_STATIC_LINK_NOARG( \
Class, Member, ArgType, RetType) \
RetType Class::LinkStub##Member(void * instance, ArgType data) { \
return Member(static_cast<Class *>(instance), data); \
} \
RetType Class::Member( \
SAL_UNUSED_PARAMETER Class *, SAL_UNUSED_PARAMETER ArgType)
#define LINK(Instance, Class, Member) ::tools::detail::makeLink( \
::tools::detail::castTo<Class *>(Instance), &Class::LinkStub##Member)
template<typename Arg, typename Ret>
class SAL_WARN_UNUSED Link {
public:
typedef Ret Stub(void *, Arg);
Link(): function_(nullptr), instance_(nullptr) {}
Link(void * instance, Stub * function):
function_(function), instance_(instance) {}
Ret Call(Arg data) const
{ return function_ == nullptr ? Ret() : (*function_)(instance_, data); }
bool IsSet() const { return function_ != nullptr; }
bool operator !() const { return !IsSet(); }
bool operator <(Link const & other) const {
sal_uIntPtr ptr1 = reinterpret_cast<sal_uIntPtr>(function_);
sal_uIntPtr ptr2 = reinterpret_cast<sal_uIntPtr>(other.function_);
if (ptr1 < ptr2)
return true;
else if (ptr1 > ptr2)
return false;
else
return instance_ < other.instance_;
};
bool operator ==(Link const & other) const
{ return function_ == other.function_ && instance_ == other.instance_; };
void *GetInstance() const { return instance_; }
private:
Stub * function_;
void * instance_;
};
// Class used to indicate that the Call() parameter is not in use:
class LinkParamNone { LinkParamNone() = delete; };
namespace tools { namespace detail {
// Avoids loplugin:redundantcast in LINK macro, in the common case that Instance
// is already of type Class * (instead of a derived type):
template<typename To, typename From> To castTo(From from)
{ return static_cast<To>(from); }
template<typename Arg, typename Ret>
Link<Arg, Ret> makeLink(void * instance, Ret (* function)(void *, Arg)) {
return Link<Arg, Ret>(instance, function);
}
} }
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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