[Boost-commit] svn:boost r86440 - trunk/boost/thread/detail

Subject: [Boost-commit] svn:boost r86440 - trunk/boost/thread/detail
From: vicente.botet_at_[hidden]
Date: 2013-10-26 06:20:02

Author: viboes
Date: 2013-10-26 06:20:02 EDT (Sat, 26 Oct 2013)
New Revision: 86440
URL: http://svn.boost.org/trac/boost/changeset/86440

Log:
Thread: Added a portable copyable/movable nullary_function functor.

Added:
   trunk/boost/thread/detail/nullary_function.hpp   (contents, props changed)

Added: trunk/boost/thread/detail/nullary_function.hpp
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ trunk/boost/thread/detail/nullary_function.hpp	2013-10-26 06:20:02 EDT (Sat, 26 Oct 2013)	(r86440)
@@ -0,0 +1,213 @@
+// Copyright (C) 2013 Vicente J. Botet Escriba
+//
+//  Distributed under the Boost Software License, Version 1.0. (See accompanying
+//  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+// 2013/09 Vicente J. Botet Escriba
+//    Adapt to boost from CCIA C++11 implementation
+//    Make use of Boost.Move
+
+#ifndef BOOST_THREAD_DETAIL_NULLARY_FUNCTION_HPP
+#define BOOST_THREAD_DETAIL_NULLARY_FUNCTION_HPP
+
+#include <boost/config.hpp>
+#include <boost/thread/detail/memory.hpp>
+#include <boost/thread/detail/move.hpp>
+#include <boost/smart_ptr/shared_ptr.hpp>
+#include <boost/type_traits/decay.hpp>
+
+namespace boost
+{
+  namespace detail
+  {
+
+    template <typename F>
+    class nullary_function;
+    template <>
+    class nullary_function<void()>
+    {
+      struct impl_base
+      {
+        virtual void call()=0;
+        virtual ~impl_base()
+        {
+        }
+      };
+      shared_ptr<impl_base> impl;
+      template <typename F>
+      struct impl_type: impl_base
+      {
+        F f;
+#ifdef BOOST_NO_CXX11_RVALUE_REFERENCES
+        impl_type(F &f_)
+          : f(f_)
+        {}
+#endif
+        impl_type(BOOST_THREAD_RV_REF(F) f_)
+          : f(boost::move(f_))
+        {}
+
+        void call()
+        {
+          f();
+        }
+      };
+      struct impl_type_ptr: impl_base
+      {
+        void (*f)();
+        impl_type_ptr(void (*f_)())
+          : f(f_)
+        {}
+        void call()
+        {
+          f();
+        }
+      };
+    public:
+      BOOST_THREAD_MOVABLE(nullary_function)
+
+      nullary_function(void (*f)()):
+      impl(new impl_type_ptr(f))
+      {}
+
+#ifdef BOOST_NO_CXX11_RVALUE_REFERENCES
+      template<typename F>
+      nullary_function(F& f):
+      impl(new impl_type<F>(f))
+      {}
+#endif
+      template<typename F>
+      nullary_function(BOOST_THREAD_RV_REF(F) f):
+      impl(new impl_type<typename decay<F>::type>(thread_detail::decay_copy(boost::forward<F>(f))))
+      {}
+
+      nullary_function()
+        : impl()
+      {
+      }
+      nullary_function(nullary_function const& other) BOOST_NOEXCEPT :
+      impl(other.impl)
+      {
+      }
+      nullary_function(BOOST_THREAD_RV_REF(nullary_function) other) BOOST_NOEXCEPT :
+      impl(BOOST_THREAD_RV(other).impl)
+      {
+        BOOST_THREAD_RV(other).impl.reset();
+      }
+      ~nullary_function()
+      {
+      }
+
+      nullary_function& operator=(nullary_function const& other) BOOST_NOEXCEPT
+      {
+        impl=other.impl;
+        return *this;
+      }
+      nullary_function& operator=(BOOST_THREAD_RV_REF(nullary_function) other) BOOST_NOEXCEPT
+      {
+        impl=BOOST_THREAD_RV(other).impl;
+        BOOST_THREAD_RV(other).impl.reset();
+        return *this;
+      }
+
+
+      void operator()()
+      { impl->call();}
+
+    };
+
+    template <typename R>
+    class nullary_function<R()>
+    {
+      struct impl_base
+      {
+        virtual R call()=0;
+        virtual ~impl_base()
+        {
+        }
+      };
+      shared_ptr<impl_base> impl;
+      template <typename F>
+      struct impl_type: impl_base
+      {
+        F f;
+#ifdef BOOST_NO_CXX11_RVALUE_REFERENCES
+        impl_type(F &f_)
+          : f(f_)
+        {}
+#endif
+        impl_type(BOOST_THREAD_RV_REF(F) f_)
+          : f(boost::move(f_))
+        {}
+
+        R call()
+        {
+          return f();
+        }
+      };
+      struct impl_type_ptr: impl_base
+      {
+        R (*f)();
+        impl_type_ptr(R (*f_)())
+          : f(f_)
+        {}
+
+        R call()
+        {
+          return f();
+        }
+      };
+    public:
+      BOOST_THREAD_MOVABLE(nullary_function)
+
+      nullary_function(R (*f)()):
+      impl(new impl_type_ptr(f))
+      {}
+#ifdef BOOST_NO_CXX11_RVALUE_REFERENCES
+      template<typename F>
+      nullary_function(F& f):
+      impl(new impl_type<F>(f))
+      {}
+#endif
+      template<typename F>
+      nullary_function(BOOST_THREAD_RV_REF(F) f):
+      impl(new impl_type<typename decay<F>::type>(thread_detail::decay_copy(boost::forward<F>(f))))
+      {}
+
+      nullary_function(nullary_function const& other) BOOST_NOEXCEPT :
+      impl(other.impl)
+      {
+      }
+      nullary_function(BOOST_THREAD_RV_REF(nullary_function) other) BOOST_NOEXCEPT :
+      impl(BOOST_THREAD_RV(other).impl)
+      {
+        BOOST_THREAD_RV(other).impl.reset();
+      }
+      nullary_function()
+        : impl()
+      {
+      }
+      ~nullary_function()
+      {
+      }
+
+      nullary_function& operator=(nullary_function const& other) BOOST_NOEXCEPT
+      {
+        impl=other.impl;
+        return *this;
+      }
+      nullary_function& operator=(BOOST_THREAD_RV_REF(nullary_function) other) BOOST_NOEXCEPT
+      {
+        impl=BOOST_THREAD_RV(other).impl;
+        BOOST_THREAD_RV(other).impl.reset();
+        return *this;
+      }
+
+      R operator()()
+      { return impl->call();}
+
+    };
+  }
+}
+
+#endif // header