Added ExceptionPolicy enum.
git-svn-id: svn://svn.code.sf.net/p/loki-lib/code/trunk@1082 7ec92016-0320-0410-acc4-a06ded1c099a
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1 changed files with 81 additions and 48 deletions
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@ -4,12 +4,12 @@
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// Copyright (c) 2000 Petru Marginean
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// Copyright (c) 2005 Joshua Lehrer
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//
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// Permission to use, copy, modify, distribute and sell this software for any
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// purpose is hereby granted without fee, provided that the above copyright
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// notice appear in all copies and that both that copyright notice and this
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// Permission to use, copy, modify, distribute and sell this software for any
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// purpose is hereby granted without fee, provided that the above copyright
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// notice appear in all copies and that both that copyright notice and this
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// permission notice appear in supporting documentation.
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// The author makes no representations about the
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// suitability of this software for any purpose. It is provided "as is"
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// The author makes no representations about the
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// suitability of this software for any purpose. It is provided "as is"
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// without express or implied warranty.
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////////////////////////////////////////////////////////////////////////////////
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#ifndef LOKI_SCOPEGUARD_INC_
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@ -17,6 +17,7 @@
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// $Id$
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#include <exception> // needed for calls to uncaught_exception.
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#include <loki/RefToValue.h>
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@ -42,6 +43,30 @@ namespace Loki
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class ScopeGuardImplBase
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{
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public:
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enum ExceptionPolicy
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{
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AlwaysExecute = 0,
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CallIfNoException = 1,
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CallIfException = 2
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};
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ScopeGuardImplBase() throw() : dismissed_(false), exceptionPolicy_( AlwaysExecute )
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{}
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void Dismiss() const throw()
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{
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dismissed_ = true;
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}
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void SetExceptionPolicy( ExceptionPolicy policy ) const throw()
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{
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exceptionPolicy_ = policy;
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}
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private:
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/// Copy-assignment operator is not implemented and private.
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ScopeGuardImplBase& operator =(const ScopeGuardImplBase&);
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@ -51,34 +76,42 @@ namespace Loki
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{}
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/// Copy-constructor takes over responsibility from other ScopeGuard.
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ScopeGuardImplBase(const ScopeGuardImplBase& other) throw()
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ScopeGuardImplBase(const ScopeGuardImplBase& other) throw()
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: dismissed_(other.dismissed_)
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, exceptionPolicy_( other.exceptionPolicy_ )
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{
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other.Dismiss();
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}
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template <typename J>
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static void SafeExecute(J& j) throw()
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static void SafeExecute(J& j) throw()
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{
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if ( AlwaysExecute != j.exceptionPolicy_ )
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{
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const bool anyThrown = ::std::uncaught_exception();
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if ( anyThrown )
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{
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if ( CallIfNoException == j.exceptionPolicy_ )
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j.Dismiss();
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}
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else if ( CallIfException == j.exceptionPolicy_ )
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{
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j.Dismiss();
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}
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}
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if (!j.dismissed_)
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{
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try
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{
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j.Execute();
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}
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catch(...)
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{}
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}
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}
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mutable bool dismissed_;
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public:
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ScopeGuardImplBase() throw() : dismissed_(false)
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{}
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void Dismiss() const throw()
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{
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dismissed_ = true;
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}
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mutable ExceptionPolicy exceptionPolicy_;
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};
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////////////////////////////////////////////////////////////////
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@ -113,24 +146,24 @@ namespace Loki
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return ScopeGuardImpl0<F>(fun);
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}
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~ScopeGuardImpl0() throw()
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~ScopeGuardImpl0() throw()
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{
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SafeExecute(*this);
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}
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void Execute()
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void Execute()
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{
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fun_();
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}
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protected:
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ScopeGuardImpl0(F fun) : fun_(fun)
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ScopeGuardImpl0(F fun) : fun_(fun)
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{}
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F fun_;
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};
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template <typename F>
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template <typename F>
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inline ScopeGuardImpl0<F> MakeGuard(F fun)
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{
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return ScopeGuardImpl0<F>::MakeGuard(fun);
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@ -160,7 +193,7 @@ namespace Loki
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return ScopeGuardImpl1<F, P1>(fun, p1);
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}
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~ScopeGuardImpl1() throw()
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~ScopeGuardImpl1() throw()
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{
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SafeExecute(*this);
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}
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@ -171,14 +204,14 @@ namespace Loki
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}
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protected:
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ScopeGuardImpl1(F fun, P1 p1) : fun_(fun), p1_(p1)
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ScopeGuardImpl1(F fun, P1 p1) : fun_(fun), p1_(p1)
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{}
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F fun_;
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const P1 p1_;
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};
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template <typename F, typename P1>
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template <typename F, typename P1>
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inline ScopeGuardImpl1<F, P1> MakeGuard(F fun, P1 p1)
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{
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return ScopeGuardImpl1<F, P1>::MakeGuard(fun, p1);
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@ -208,7 +241,7 @@ namespace Loki
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return ScopeGuardImpl2<F, P1, P2>(fun, p1, p2);
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}
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~ScopeGuardImpl2() throw()
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~ScopeGuardImpl2() throw()
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{
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SafeExecute(*this);
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}
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@ -219,7 +252,7 @@ namespace Loki
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}
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protected:
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ScopeGuardImpl2(F fun, P1 p1, P2 p2) : fun_(fun), p1_(p1), p2_(p2)
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ScopeGuardImpl2(F fun, P1 p1, P2 p2) : fun_(fun), p1_(p1), p2_(p2)
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{}
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F fun_;
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@ -257,7 +290,7 @@ namespace Loki
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return ScopeGuardImpl3<F, P1, P2, P3>(fun, p1, p2, p3);
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}
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~ScopeGuardImpl3() throw()
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~ScopeGuardImpl3() throw()
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{
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SafeExecute(*this);
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}
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@ -268,7 +301,7 @@ namespace Loki
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}
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protected:
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ScopeGuardImpl3(F fun, P1 p1, P2 p2, P3 p3) : fun_(fun), p1_(p1), p2_(p2), p3_(p3)
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ScopeGuardImpl3(F fun, P1 p1, P2 p2, P3 p3) : fun_(fun), p1_(p1), p2_(p2), p3_(p3)
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{}
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F fun_;
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@ -308,7 +341,7 @@ namespace Loki
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return ScopeGuardImpl4< F, P1, P2, P3, P4 >( fun, p1, p2, p3, p4 );
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}
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~ScopeGuardImpl4() throw()
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~ScopeGuardImpl4() throw()
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{
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SafeExecute( *this );
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}
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@ -361,7 +394,7 @@ namespace Loki
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return ScopeGuardImpl5< F, P1, P2, P3, P4, P5 >( fun, p1, p2, p3, p4, p5 );
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}
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~ScopeGuardImpl5() throw()
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~ScopeGuardImpl5() throw()
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{
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SafeExecute( *this );
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}
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@ -415,18 +448,18 @@ namespace Loki
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return ObjScopeGuardImpl0<Obj, MemFun>(obj, memFun);
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}
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~ObjScopeGuardImpl0() throw()
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~ObjScopeGuardImpl0() throw()
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{
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SafeExecute(*this);
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}
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void Execute()
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void Execute()
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{
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(obj_.*memFun_)();
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}
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protected:
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ObjScopeGuardImpl0(Obj& obj, MemFun memFun) : obj_(obj), memFun_(memFun)
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ObjScopeGuardImpl0(Obj& obj, MemFun memFun) : obj_(obj), memFun_(memFun)
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{}
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Obj& obj_;
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@ -440,13 +473,13 @@ namespace Loki
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}
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template <typename Ret, class Obj1, class Obj2>
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inline ObjScopeGuardImpl0<Obj1,Ret(Obj2::*)()> MakeGuard(Ret(Obj2::*memFun)(), Obj1 &obj)
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inline ObjScopeGuardImpl0<Obj1,Ret(Obj2::*)()> MakeGuard(Ret(Obj2::*memFun)(), Obj1 &obj)
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{
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return ObjScopeGuardImpl0<Obj1,Ret(Obj2::*)()>::MakeObjGuard(obj,memFun);
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}
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template <typename Ret, class Obj1, class Obj2>
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inline ObjScopeGuardImpl0<Obj1,Ret(Obj2::*)()> MakeGuard(Ret(Obj2::*memFun)(), Obj1 *obj)
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inline ObjScopeGuardImpl0<Obj1,Ret(Obj2::*)()> MakeGuard(Ret(Obj2::*memFun)(), Obj1 *obj)
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{
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return ObjScopeGuardImpl0<Obj1,Ret(Obj2::*)()>::MakeObjGuard(*obj,memFun);
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}
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@ -477,20 +510,20 @@ namespace Loki
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return ObjScopeGuardImpl1<Obj, MemFun, P1>(obj, memFun, p1);
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}
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~ObjScopeGuardImpl1() throw()
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~ObjScopeGuardImpl1() throw()
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{
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SafeExecute(*this);
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}
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void Execute()
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void Execute()
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{
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(obj_.*memFun_)(p1_);
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}
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protected:
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ObjScopeGuardImpl1(Obj& obj, MemFun memFun, P1 p1) : obj_(obj), memFun_(memFun), p1_(p1)
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ObjScopeGuardImpl1(Obj& obj, MemFun memFun, P1 p1) : obj_(obj), memFun_(memFun), p1_(p1)
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{}
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Obj& obj_;
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MemFun memFun_;
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const P1 p1_;
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@ -503,13 +536,13 @@ namespace Loki
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}
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template <typename Ret, class Obj1, class Obj2, typename P1a, typename P1b>
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inline ObjScopeGuardImpl1<Obj1,Ret(Obj2::*)(P1a),P1b> MakeGuard(Ret(Obj2::*memFun)(P1a), Obj1 &obj, P1b p1)
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inline ObjScopeGuardImpl1<Obj1,Ret(Obj2::*)(P1a),P1b> MakeGuard(Ret(Obj2::*memFun)(P1a), Obj1 &obj, P1b p1)
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{
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return ObjScopeGuardImpl1<Obj1,Ret(Obj2::*)(P1a),P1b>::MakeObjGuard(obj,memFun,p1);
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}
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template <typename Ret, class Obj1, class Obj2, typename P1a, typename P1b>
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inline ObjScopeGuardImpl1<Obj1,Ret(Obj2::*)(P1a),P1b> MakeGuard(Ret(Obj2::*memFun)(P1a), Obj1 *obj, P1b p1)
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inline ObjScopeGuardImpl1<Obj1,Ret(Obj2::*)(P1a),P1b> MakeGuard(Ret(Obj2::*memFun)(P1a), Obj1 *obj, P1b p1)
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{
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return ObjScopeGuardImpl1<Obj1,Ret(Obj2::*)(P1a),P1b>::MakeObjGuard(*obj,memFun,p1);
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}
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@ -540,18 +573,18 @@ namespace Loki
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return ObjScopeGuardImpl2<Obj, MemFun, P1, P2>(obj, memFun, p1, p2);
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}
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~ObjScopeGuardImpl2() throw()
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~ObjScopeGuardImpl2() throw()
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{
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SafeExecute(*this);
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}
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void Execute()
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void Execute()
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{
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(obj_.*memFun_)(p1_, p2_);
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}
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protected:
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ObjScopeGuardImpl2(Obj& obj, MemFun memFun, P1 p1, P2 p2) : obj_(obj), memFun_(memFun), p1_(p1), p2_(p2)
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ObjScopeGuardImpl2(Obj& obj, MemFun memFun, P1 p1, P2 p2) : obj_(obj), memFun_(memFun), p1_(p1), p2_(p2)
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{}
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Obj& obj_;
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@ -567,13 +600,13 @@ namespace Loki
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}
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template <typename Ret, class Obj1, class Obj2, typename P1a, typename P1b, typename P2a, typename P2b>
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inline ObjScopeGuardImpl2<Obj1,Ret(Obj2::*)(P1a,P2a),P1b,P2b> MakeGuard(Ret(Obj2::*memFun)(P1a,P2a), Obj1 &obj, P1b p1, P2b p2)
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inline ObjScopeGuardImpl2<Obj1,Ret(Obj2::*)(P1a,P2a),P1b,P2b> MakeGuard(Ret(Obj2::*memFun)(P1a,P2a), Obj1 &obj, P1b p1, P2b p2)
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{
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return ObjScopeGuardImpl2<Obj1,Ret(Obj2::*)(P1a,P2a),P1b,P2b>::MakeObjGuard(obj,memFun,p1,p2);
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}
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template <typename Ret, class Obj1, class Obj2, typename P1a, typename P1b, typename P2a, typename P2b>
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inline ObjScopeGuardImpl2<Obj1,Ret(Obj2::*)(P1a,P2a),P1b,P2b> MakeGuard(Ret(Obj2::*memFun)(P1a,P2a), Obj1 *obj, P1b p1, P2b p2)
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inline ObjScopeGuardImpl2<Obj1,Ret(Obj2::*)(P1a,P2a),P1b,P2b> MakeGuard(Ret(Obj2::*memFun)(P1a,P2a), Obj1 *obj, P1b p1, P2b p2)
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{
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return ObjScopeGuardImpl2<Obj1,Ret(Obj2::*)(P1a,P2a),P1b,P2b>::MakeObjGuard(*obj,memFun,p1,p2);
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}
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@ -605,12 +638,12 @@ namespace Loki
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return ObjScopeGuardImpl3< Obj, MemFun, P1, P2, P3 >( obj, memFun, p1, p2, p3 );
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}
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~ObjScopeGuardImpl3() throw()
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~ObjScopeGuardImpl3() throw()
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{
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SafeExecute( *this );
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}
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void Execute()
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void Execute()
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{
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( obj_.*memFun_ )( p1_, p2_, p3_ );
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}
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