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35 /*! \libinternal \file
37 * Declares gmx::MdModuleNotification.
39 * \author Christian Blau <blau@kth.se>
41 * \ingroup module_mdrunutility
44 #ifndef GMX_MDRUNUTILITY_MDMODULENOTIFICATION_H
45 #define GMX_MDRUNUTILITY_MDMODULENOTIFICATION_H
50 #include "gromacs/utility/basedefinitions.h"
57 /*! \libinternal \brief
58 * Subscribe and trigger notification functions.
60 * Extends MdModuleNotificationBase with new notification function and routine
61 * to subscribe new listeners.
63 * To create a class of this type that provides callbacks, e.g., for events
64 * EventA, and EventB use registerMdModuleNotification<EventA, EventB>::type.
66 * \tparam CallParameter of the function to be notified
67 * \tparam MdModuleNotificationBase class to be extended with a notification
74 runner [label="runner:\nMdrunner"],
75 CallParameter [label = "eventA:\nCallParameter"],
76 MOD [label = "mdModules_:\nMdModules"],
77 ModuleA [label="moduleA"],
78 ModuleB [label="moduleB"],
79 MdModuleNotification [label="notifier_:\nMdModuleNotification"];
81 MOD box MdModuleNotification [label = "mdModules_ owns notifier_ and moduleA/B"];
82 MOD =>> ModuleA [label="instantiates(notifier_)"];
83 ModuleA =>> MdModuleNotification [label="subscribe(otherfunc)"];
85 MOD =>> ModuleB [label="instantiates(notifier_)"];
86 ModuleB =>> MdModuleNotification [label="subscribe(func)"];
88 runner =>> CallParameter [label="instantiate"];
89 CallParameter =>> runner ;
90 runner =>> MOD [label="notify(eventA)"];
91 MOD =>> MdModuleNotification [label="notify(eventA)"];
92 MdModuleNotification =>> ModuleA [label="notify(eventA)"];
93 ModuleA -> ModuleA [label="func(eventA)"];
94 MdModuleNotification =>> ModuleB [label="notify(eventA)"];
95 ModuleB -> ModuleB [label="otherfunc(eventA)"];
99 * \note All added subscribers are required to out-live the MdModuleNotification
102 template <class CallParameter, class MdModuleNotificationBase>
103 class MdModuleNotification : public MdModuleNotificationBase
106 //! Make base class notification trigger available to this class
107 using MdModuleNotificationBase::notify;
108 //! Make base class subscription available to this class
109 using MdModuleNotificationBase::subscribe;
111 /*! \brief Trigger the subscribed notifications.
112 * \param[in] callParameter of the function to be called back
114 void notify(CallParameter callParameter) const
116 for (auto &callBack : callBackFunctions_)
118 callBack(callParameter);
123 * Add callback function to be called when notification is triggered.
125 * Notifications are distinguished by their call signature.
127 * \param[in] callBackFunction to be called from this class
129 void subscribe(std::function<void(CallParameter)> callBackFunction)
131 callBackFunctions_.emplace_back(callBackFunction);
135 std::vector < std::function < void(CallParameter)>> callBackFunctions_;
139 * \brief Aide to avoid nested MdModuleNotification definition.
142 * MdModuleNotification<CallParameterA, MdModuleNotification<CallParameterB, etc ... >>
143 * this allows to write
144 * registerMdModuleNotification<CallParameterA, CallParameterB, ...>::type
146 * \tparam CallParameter all the event types to be registered
148 template <class ... CallParameter> struct registerMdModuleNotification;
150 /*! \internal \brief Template specialization to end parameter unpacking recursion.
153 struct registerMdModuleNotification<>
156 * \brief Do nothing but be base class of MdModuleNotification.
158 * Required so that using MdModuleNotificationBase::notify and
159 * MdModuleNotificationBase::subscribe are valid in derived class.
161 class NoCallParameter
164 //! Do nothing but provide MdModuleNotification::notify to derived class
166 //! Do nothing but provide MdModuleNotification::subscribe to derived class
169 /*! \brief Defines a type if no notifications are managed.
171 * This ensures that code works with MdModuleCallParameterManagement that
172 * does not manage any notifications.
174 using type = NoCallParameter;
178 * \brief Template specialization to assemble MdModuleNotification.
180 * Assembly of MdModuleNotification is performed by recursively taking off the
181 * front of the CallParameter parameter pack and constructing the nested type
182 * definition of MdModuleNotification base classes.
184 * \tparam CurrentCallParameter front of the template parameter pack
185 * \tparam CallParameter rest of the event types
187 template <class CurrentCallParameter, class ... CallParameter>
188 struct registerMdModuleNotification<CurrentCallParameter, CallParameter...>
191 //! The next type with rest of the arguments with the front parameter removed.
192 using next_type = typename registerMdModuleNotification<CallParameter...>::type;
193 //! The type of the MdModuleNotification
194 using type = MdModuleNotification<CurrentCallParameter, next_type>;
197 class KeyValueTreeObject;
198 class KeyValueTreeBuilder;
199 class LocalAtomSetManager;
200 class IndexGroupsAndNames;
202 struct MdModulesNotifier
204 //! Register callback function types for MdModule
205 registerMdModuleNotification<
208 KeyValueTreeBuilder *,
209 const KeyValueTreeObject &,
210 LocalAtomSetManager *>::type notifier_;