| 1 | // Boost.TypeErasure library |
|---|---|
| 2 | // |
| 3 | // Copyright 2015 Steven Watanabe |
| 4 | // |
| 5 | // Distributed under the Boost Software License Version 1.0. (See |
| 6 | // accompanying file LICENSE_1_0.txt or copy at |
| 7 | // http://www.boost.org/LICENSE_1_0.txt) |
| 8 | // |
| 9 | // $Id$ |
| 10 | |
| 11 | #define BOOST_TYPE_ERASURE_SOURCE |
| 12 | |
| 13 | #include <boost/type_erasure/register_binding.hpp> |
| 14 | #include <boost/thread/shared_mutex.hpp> |
| 15 | #include <boost/thread/lock_types.hpp> |
| 16 | #include <map> |
| 17 | #include <utility> |
| 18 | |
| 19 | namespace { |
| 20 | |
| 21 | using ::boost::type_erasure::detail::key_type; |
| 22 | using ::boost::type_erasure::detail::value_type; |
| 23 | |
| 24 | typedef ::std::map<key_type, void(*)()> map_type; |
| 25 | typedef ::boost::shared_mutex mutex_type; |
| 26 | |
| 27 | // std::pair can have problems on older implementations |
| 28 | // when it tries to use the copy constructor of the mutex. |
| 29 | struct data_type |
| 30 | { |
| 31 | map_type first; |
| 32 | mutex_type second; |
| 33 | }; |
| 34 | |
| 35 | data_type * get_data() { |
| 36 | static data_type result; |
| 37 | return &result; |
| 38 | } |
| 39 | |
| 40 | } |
| 41 | |
| 42 | BOOST_TYPE_ERASURE_DECL void boost::type_erasure::detail::register_function_impl(const key_type& key, value_type fn) { |
| 43 | ::data_type * data = ::get_data(); |
| 44 | ::boost::unique_lock<mutex_type> lock(data->second); |
| 45 | data->first.insert(x: std::make_pair(x: key, y&: fn)); |
| 46 | } |
| 47 | |
| 48 | BOOST_TYPE_ERASURE_DECL value_type boost::type_erasure::detail::lookup_function_impl(const key_type& key) { |
| 49 | ::data_type * data = ::get_data(); |
| 50 | ::boost::shared_lock<mutex_type> lock(data->second); |
| 51 | ::map_type::const_iterator pos = data->first.find(x: key); |
| 52 | if(pos != data->first.end()) { |
| 53 | return pos->second; |
| 54 | } else { |
| 55 | throw bad_any_cast(); |
| 56 | } |
| 57 | } |
| 58 |