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Diffstat (limited to 'websocketpp/common/functional.hpp')
| -rw-r--r-- | websocketpp/common/functional.hpp | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/websocketpp/common/functional.hpp b/websocketpp/common/functional.hpp new file mode 100644 index 00000000..d332dd15 --- /dev/null +++ b/websocketpp/common/functional.hpp @@ -0,0 +1,105 @@ +/* + * Copyright (c) 2014, Peter Thorson. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of the WebSocket++ Project nor the + * names of its contributors may be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL PETER THORSON BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef WEBSOCKETPP_COMMON_FUNCTIONAL_HPP +#define WEBSOCKETPP_COMMON_FUNCTIONAL_HPP + +#include <websocketpp/common/cpp11.hpp> + +// If we've determined that we're in full C++11 mode and the user hasn't +// explicitly disabled the use of C++11 functional header, then prefer it to +// boost. +#if defined _WEBSOCKETPP_CPP11_INTERNAL_ && !defined _WEBSOCKETPP_NO_CPP11_FUNCTIONAL_ + #ifndef _WEBSOCKETPP_CPP11_FUNCTIONAL_ + #define _WEBSOCKETPP_CPP11_FUNCTIONAL_ + #endif +#endif + +// If we're on Visual Studio 2010 or higher and haven't explicitly disabled +// the use of C++11 functional header then prefer it to boost. +#if defined(_MSC_VER) && _MSC_VER >= 1600 && !defined _WEBSOCKETPP_NO_CPP11_FUNCTIONAL_ + #ifndef _WEBSOCKETPP_CPP11_FUNCTIONAL_ + #define _WEBSOCKETPP_CPP11_FUNCTIONAL_ + #endif +#endif + + + +#ifdef _WEBSOCKETPP_CPP11_FUNCTIONAL_ + #include <functional> +#else + #include <boost/bind.hpp> + #include <boost/function.hpp> + #include <boost/ref.hpp> +#endif + + + +namespace websocketpp { +namespace lib { + +#ifdef _WEBSOCKETPP_CPP11_FUNCTIONAL_ + using std::function; + using std::bind; + using std::ref; + namespace placeholders = std::placeholders; + + // There are some cases where a C++11 compiler balks at using std::ref + // but a C++03 compiler using boost function requires boost::ref. As such + // lib::ref is not useful in these cases. Instead this macro allows the use + // of boost::ref in the case of a boost compile or no reference wrapper at + // all in the case of a C++11 compile + #define _WEBSOCKETPP_REF(x) x + + template <typename T> + void clear_function(T & x) { + x = nullptr; + } +#else + using boost::function; + using boost::bind; + using boost::ref; + namespace placeholders { + /// \todo this feels hacky, is there a better way? + using ::_1; + using ::_2; + using ::_3; + } + + // See above definition for more details on what this is and why it exists + #define _WEBSOCKETPP_REF(x) boost::ref(x) + + template <typename T> + void clear_function(T & x) { + x.clear(); + } +#endif + +} // namespace lib +} // namespace websocketpp + +#endif // WEBSOCKETPP_COMMON_FUNCTIONAL_HPP |