-/* Copyright (c) 2014-2015. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2014-2021. The SimGrid Team. All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
#ifndef SIMGRID_XBT_SIGNAL_HPP
#define SIMGRID_XBT_SIGNAL_HPP
-#if SIMGRID_HAVE_LIBSIG
-#include <sigc++/sigc++.h>
-#else
-#include <boost/signals2.hpp>
-#endif
+#include <functional>
+#include <map>
+#include <utility>
namespace simgrid {
namespace xbt {
-#if SIMGRID_HAVE_LIBSIG
-
- // Wraps sigc++ signals with the interface of boost::signals2:
- template<class T> class signal;
- template<class R, class... P>
- class signal<R(P...)> {
- private:
- sigc::signal<R, P...> sig_;
- public:
- template<class U> XBT_ALWAYS_INLINE
- void connect(U&& slot)
- {
- sig_.connect(std::forward<U>(slot));
- }
- template<class Res, class... Args> XBT_ALWAYS_INLINE
- void connect(Res(*slot)(Args...))
- {
- sig_.connect(sigc::ptr_fun(slot));
- }
- template<class... Args> XBT_ALWAYS_INLINE
- R operator()(Args&&... args) const
- {
- return sig_.emit(std::forward<Args>(args)...);
- }
- void disconnect_all_slots()
- {
- sig_.clear();
- }
- };
-
-#else
-
- template<class T>
- using signal = ::boost::signals2::signal<T>;
-
-#endif
-
+template <class S> class signal;
+
+/** @brief
+ * A signal/slot mechanism, where you can attach callbacks to a given signal, and then fire the signal.
+ *
+ * The template parameter is the function signature of the signal (the return value currently ignored).
+ */
+template <class R, class... P> class signal<R(P...)> {
+ using callback_type = std::function<R(P...)>;
+ std::map<unsigned int, callback_type> handlers_;
+ unsigned int callback_sequence_id = 0;
+
+public:
+ /** Add a new callback to this signal */
+ template <class U> unsigned int connect(U slot)
+ {
+ handlers_.insert({callback_sequence_id, std::move(slot)});
+ return callback_sequence_id++;
+ }
+ /** Fire that signal, invoking all callbacks */
+ R operator()(P... args) const
+ {
+ for (auto const& handler : handlers_)
+ handler.second(args...);
+ }
+ /** Remove a callback */
+ void disconnect(unsigned int id) { handlers_.erase(id); }
+ /** Remove all callbacks */
+ void disconnect_slots() { handlers_.clear(); }
+ /** Get the amount of callbacks */
+ int get_slot_count() { return handlers_.size(); }
+};
}
}