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+#ifndef fsm_queue_hh
+#define fsm_queue_hh
+// io-hub - Modular Input/Output. {{{
+//
+// Copyright (C) 2013 Nicolas Schodet
+//
+// APBTeam:
+// Web: http://apbteam.org/
+// Email: team AT apbteam DOT org
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+//
+// }}}
+#include "ucoolib/common.hh"
+
+extern "C" {
+#define ANGFSM_NAME AI
+#include "angfsm.h"
+}
+
+/// Handle asynchronous FSM event queue.
+class FsmQueue
+{
+ public:
+#ifdef TARGET_host
+ typedef uint16_t Event;
+#else
+ typedef angfsm_AI_event_t Event;
+#endif
+ public:
+ /// Constructor.
+ FsmQueue ();
+ /// Post an event to be processed in the next main loop.
+ void post (Event e);
+ /// Poll for event (return true if there is an event pending).
+ bool poll () const { return nb_ != 0; }
+ /// Pop one event from the queue.
+ Event pop ();
+ private:
+ /// Maximum number of events in the queue.
+ static const int queue_size_ = 8;
+ /// Events to post to the FSM in next iteration.
+ Event events_[queue_size_];
+ /// First event in the queue.
+ int head_;
+ /// Number of events in the queue.
+ int nb_;
+};
+
+#endif // fsm_queue_hh