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Diffstat (limited to '3rdParty/Boost/src/boost/signals2/detail/slot_call_iterator.hpp')
-rw-r--r-- | 3rdParty/Boost/src/boost/signals2/detail/slot_call_iterator.hpp | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/3rdParty/Boost/src/boost/signals2/detail/slot_call_iterator.hpp b/3rdParty/Boost/src/boost/signals2/detail/slot_call_iterator.hpp new file mode 100644 index 0000000..99eec1d --- /dev/null +++ b/3rdParty/Boost/src/boost/signals2/detail/slot_call_iterator.hpp @@ -0,0 +1,147 @@ +// Boost.Signals2 library + +// Copyright Douglas Gregor 2001-2004. +// Copyright Frank Mori Hess 2007-2008. +// Use, modification and +// distribution is subject to 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) + +// For more information, see http://www.boost.org + +#ifndef BOOST_SIGNALS2_SLOT_CALL_ITERATOR_HPP +#define BOOST_SIGNALS2_SLOT_CALL_ITERATOR_HPP + +#include <boost/assert.hpp> +#include <boost/aligned_storage.hpp> +#include <boost/iterator/iterator_facade.hpp> +#include <boost/optional.hpp> +#include <boost/scoped_ptr.hpp> +#include <boost/signals2/connection.hpp> +#include <boost/signals2/slot_base.hpp> +#include <boost/signals2/detail/auto_buffer.hpp> +#include <boost/signals2/detail/unique_lock.hpp> +#include <boost/weak_ptr.hpp> + +namespace boost { + namespace signals2 { + namespace detail { + template<typename ResultType, typename Function> + class slot_call_iterator_cache + { + public: + slot_call_iterator_cache(const Function &f_arg): + f(f_arg), + connected_slot_count(0), + disconnected_slot_count(0) + {} + optional<ResultType> result; + typedef auto_buffer<void_shared_ptr_variant, store_n_objects<10> > tracked_ptrs_type; + tracked_ptrs_type tracked_ptrs; + Function f; + unsigned connected_slot_count; + unsigned disconnected_slot_count; + }; + + // Generates a slot call iterator. Essentially, this is an iterator that: + // - skips over disconnected slots in the underlying list + // - calls the connected slots when dereferenced + // - caches the result of calling the slots + template<typename Function, typename Iterator, typename ConnectionBody> + class slot_call_iterator_t + : public boost::iterator_facade<slot_call_iterator_t<Function, Iterator, ConnectionBody>, + typename Function::result_type, + boost::single_pass_traversal_tag, + typename Function::result_type const&> + { + typedef boost::iterator_facade<slot_call_iterator_t<Function, Iterator, ConnectionBody>, + typename Function::result_type, + boost::single_pass_traversal_tag, + typename Function::result_type const&> + inherited; + + typedef typename Function::result_type result_type; + + friend class boost::iterator_core_access; + + public: + slot_call_iterator_t(Iterator iter_in, Iterator end_in, + slot_call_iterator_cache<result_type, Function> &c): + iter(iter_in), end(end_in), + cache(&c), callable_iter(end_in) + { + lock_next_callable(); + } + + typename inherited::reference + dereference() const + { + if (!cache->result) { + try + { + cache->result.reset(cache->f(*iter)); + } + catch(expired_slot &) + { + (*iter)->disconnect(); + throw; + } + } + return cache->result.get(); + } + + void increment() + { + ++iter; + lock_next_callable(); + cache->result.reset(); + } + + bool equal(const slot_call_iterator_t& other) const + { + return iter == other.iter; + } + + private: + typedef unique_lock<connection_body_base> lock_type; + + void lock_next_callable() const + { + if(iter == callable_iter) + { + return; + } + for(;iter != end; ++iter) + { + lock_type lock(**iter); + cache->tracked_ptrs.clear(); + (*iter)->nolock_grab_tracked_objects(std::back_inserter(cache->tracked_ptrs)); + if((*iter)->nolock_nograb_connected()) + { + ++cache->connected_slot_count; + }else + { + ++cache->disconnected_slot_count; + } + if((*iter)->nolock_nograb_blocked() == false) + { + callable_iter = iter; + break; + } + } + if(iter == end) + { + callable_iter = end; + } + } + + mutable Iterator iter; + Iterator end; + slot_call_iterator_cache<result_type, Function> *cache; + mutable Iterator callable_iter; + }; + } // end namespace detail + } // end namespace BOOST_SIGNALS_NAMESPACE +} // end namespace boost + +#endif // BOOST_SIGNALS2_SLOT_CALL_ITERATOR_HPP |