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Diffstat (limited to 'cpp/src/qmf/PrivateImplRef.h')
-rw-r--r-- | cpp/src/qmf/PrivateImplRef.h | 93 |
1 files changed, 0 insertions, 93 deletions
diff --git a/cpp/src/qmf/PrivateImplRef.h b/cpp/src/qmf/PrivateImplRef.h deleted file mode 100644 index 960cbb2e09..0000000000 --- a/cpp/src/qmf/PrivateImplRef.h +++ /dev/null @@ -1,93 +0,0 @@ -#ifndef QMF_PRIVATEIMPL_H -#define QMF_PRIVATEIMPL_H - -/* - * - * 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 - * - * Unless required by applicable law or agreed to in writing, - * software distributed under the License is distributed on an - * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY - * KIND, either express or implied. See the License for the - * specific language governing permissions and limitations - * under the License. - * - */ - -#include "qmf/ImportExport.h" -#include "qpid/RefCounted.h" -#include <boost/intrusive_ptr.hpp> - -namespace qmf { - -/** - * Helper class to implement a class with a private, reference counted - * implementation and reference semantics. - * - * Such classes are used in the public API to hide implementation, they - * should. Example of use: - * - * === Foo.h - * - * template <class T> PrivateImplRef; - * class FooImpl; - * - * Foo : public Handle<FooImpl> { - * public: - * Foo(FooImpl* = 0); - * Foo(const Foo&); - * ~Foo(); - * Foo& operator=(const Foo&); - * - * int fooDo(); // and other Foo functions... - * - * private: - * typedef FooImpl Impl; - * Impl* impl; - * friend class PrivateImplRef<Foo>; - * - * === Foo.cpp - * - * typedef PrivateImplRef<Foo> PI; - * Foo::Foo(FooImpl* p) { PI::ctor(*this, p); } - * Foo::Foo(const Foo& c) : Handle<FooImpl>() { PI::copy(*this, c); } - * Foo::~Foo() { PI::dtor(*this); } - * Foo& Foo::operator=(const Foo& c) { return PI::assign(*this, c); } - * - * int foo::fooDo() { return impl->fooDo(); } - * - */ -template <class T> class PrivateImplRef { - public: - typedef typename T::Impl Impl; - typedef boost::intrusive_ptr<Impl> intrusive_ptr; - - /** Get the implementation pointer from a handle */ - static intrusive_ptr get(const T& t) { return intrusive_ptr(t.impl); } - - /** Set the implementation pointer in a handle */ - static void set(T& t, const intrusive_ptr& p) { - if (t.impl == p) return; - if (t.impl) boost::intrusive_ptr_release(t.impl); - t.impl = p.get(); - if (t.impl) boost::intrusive_ptr_add_ref(t.impl); - } - - // Helper functions to implement the ctor, dtor, copy, assign - static void ctor(T& t, Impl* p) { t.impl = p; if (p) boost::intrusive_ptr_add_ref(p); } - static void copy(T& t, const T& x) { if (&t == &x) return; t.impl = 0; assign(t, x); } - static void dtor(T& t) { if(t.impl) boost::intrusive_ptr_release(t.impl); } - static T& assign(T& t, const T& x) { set(t, get(x)); return t;} -}; - -} // namespace qmf - -#endif /*!QMF_PRIVATEIMPL_H*/ |