-
-/*******************************************************************************
-
- Copyright (c) 2009, Charles McGarvey
- 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.
-
- 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 THE COPYRIGHT HOLDER OR CONTRIBUTORS 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.
-
-*******************************************************************************/
-
-#include <map>
-
-#include "Dispatcher.hh"
-
-
-namespace Mf {
-
-
-class Dispatcher::Impl
-{
- friend class Dispatcher;
-
- Impl() :
- mId(1) {}
-
- Dispatcher::Handler getNewHandler()
- {
- mId += 2;
- return (Dispatcher::Handler)mId;
- }
-
- typedef std::pair<Dispatcher::Handler,Dispatcher::Function> Callback;
- typedef std::multimap<std::string,Callback> CallbackLookup;
- typedef CallbackLookup::iterator CallbackIter;
-
- typedef std::multimap<Dispatcher::Handler,std::string> HandlerLookup;
- typedef HandlerLookup::iterator HandlerIter;
-
-
- inline Handler addHandler(const std::string& message,
- const Function& callback, Handler id)
- {
- mCallbacks.insert(std::make_pair(message, std::make_pair(id, callback)));
- mHandlers.insert(std::make_pair(id, message));
-
- return id;
- }
-
- inline void removeHandler(Handler id)
- {
- std::pair<HandlerIter,HandlerIter> matching(mHandlers.equal_range(id));
-
- for (HandlerIter it = matching.first; it != matching.second; ++it)
- {
- CallbackIter first = mCallbacks.find((*it).second);
- CallbackIter last = mCallbacks.end();
-
- for (CallbackIter jt = first; jt != last; ++jt)
- {
- if ((*jt).second.first == id)
- {
- mCallbacks.erase(jt);
- break;
- }
- }
- }
-
- mHandlers.erase(id);
- }
-
- void dispatch(const std::string& message, const Notification* param)
- {
- std::pair<CallbackIter,CallbackIter>
- callbacks(mCallbacks.equal_range(message));
-
- for (CallbackIter it = callbacks.first; it != callbacks.second; ++it)
- {
- Function callback = (*it).second.second;
- callback(param);
- }
- }
-
-
- unsigned long mId;
-
- CallbackLookup mCallbacks;
- HandlerLookup mHandlers;
-};
-
-
-Dispatcher::Dispatcher() :
- mImpl(new Dispatcher::Impl) {}
-
-Dispatcher::~Dispatcher() {}
-
-
-Dispatcher& Dispatcher::getInstance()
-{
- static Dispatcher dispatcher;
- return dispatcher;
-}
-
-
-Dispatcher::Handler Dispatcher::addHandler(const std::string& message,
- const Function& callback)
-{
- return addHandler(message, callback, mImpl->getNewHandler());
-}
-
-Dispatcher::Handler Dispatcher::addHandler(const std::string& message,
- const Function& callback, Handler id)
-{
- // pass through
- return mImpl->addHandler(message, callback, id);
-}
-
-
-void Dispatcher::removeHandler(Handler id)
-{
- // pass through
- return mImpl->removeHandler(id);
-}
-
-
-void Dispatcher::dispatch(const std::string& message, const Notification* param)
-{
- // pass through
- mImpl->dispatch(message, param);
-}
-
-
-} // namespace Mf
-
-/** vim: set ts=4 sw=4 tw=80: *************************************************/
-