/* Copyright 2003-2013 Joaquin M Lopez Munoz.
|
* 2019 Mike Dev <mike.dev@gmx.de>
|
* Distributed under the Boost Software License, Version 1.0.
|
* (See accompanying file LICENSE_1_0.txt or copy at
|
* https://www.boost.org/LICENSE_1_0.txt)
|
*
|
* NOTE: internalized from Boost.MultiIndex
|
*
|
*/
|
|
|
#ifndef BOOST_SIGNALS2_DETAIL_SCOPE_GUARD_HPP
|
#define BOOST_SIGNALS2_DETAIL_SCOPE_GUARD_HPP
|
|
#if defined(_MSC_VER)
|
#pragma once
|
#endif
|
|
#include <boost/core/no_exceptions_support.hpp>
|
|
namespace boost{
|
|
namespace signals2{
|
|
namespace detail{
|
|
/* This is a merely reformated version of
|
* ScopeGuard.h as defined in:
|
* Alexandrescu, A., Marginean, P.:"Generic<Programming>: Change the Way You
|
* Write Exception-Safe Code - Forever", C/C++ Users Jornal, Dec 2000,
|
* http://www.drdobbs.com/184403758
|
* with the following modifications:
|
* - General pretty formatting (pretty to my taste at least.)
|
* - Naming style changed to standard C++ library requirements.
|
* - Removed RefHolder and ByRef, whose functionality is provided
|
* already by Boost.Ref.
|
* - Removed static make_guard's and make_obj_guard's, so that the code
|
* will work even if BOOST_NO_MEMBER_TEMPLATES is defined. This forces
|
* us to move some private ctors to public, though.
|
*
|
* NB: CodeWarrior Pro 8 seems to have problems looking up safe_execute
|
* without an explicit qualification.
|
*
|
* TODO: Consider replacing with Boost.ScopeExit
|
*
|
*/
|
|
class scope_guard_impl_base
|
{
|
public:
|
scope_guard_impl_base():dismissed_(false){}
|
void dismiss()const{dismissed_=true;}
|
|
protected:
|
~scope_guard_impl_base(){}
|
|
scope_guard_impl_base(const scope_guard_impl_base& other):
|
dismissed_(other.dismissed_)
|
{
|
other.dismiss();
|
}
|
|
template<typename J>
|
static void safe_execute(J& j){
|
BOOST_TRY{
|
if(!j.dismissed_)j.execute();
|
}
|
BOOST_CATCH(...){}
|
BOOST_CATCH_END
|
}
|
|
mutable bool dismissed_;
|
|
private:
|
scope_guard_impl_base& operator=(const scope_guard_impl_base&);
|
};
|
|
typedef const scope_guard_impl_base& scope_guard;
|
|
template<class Obj,typename MemFun,typename P1,typename P2>
|
class obj_scope_guard_impl2:public scope_guard_impl_base
|
{
|
public:
|
obj_scope_guard_impl2(Obj& obj,MemFun mem_fun,P1 p1,P2 p2):
|
obj_(obj),mem_fun_(mem_fun),p1_(p1),p2_(p2)
|
{}
|
~obj_scope_guard_impl2(){scope_guard_impl_base::safe_execute(*this);}
|
void execute(){(obj_.*mem_fun_)(p1_,p2_);}
|
|
protected:
|
Obj& obj_;
|
MemFun mem_fun_;
|
const P1 p1_;
|
const P2 p2_;
|
};
|
|
template<class Obj,typename MemFun,typename P1,typename P2>
|
inline obj_scope_guard_impl2<Obj,MemFun,P1,P2>
|
make_obj_guard(Obj& obj,MemFun mem_fun,P1 p1,P2 p2)
|
{
|
return obj_scope_guard_impl2<Obj,MemFun,P1,P2>(obj,mem_fun,p1,p2);
|
}
|
|
} /* namespace signals2::detail */
|
|
} /* namespace signals2 */
|
|
} /* namespace boost */
|
|
#endif
|
