99 lines
3.5 KiB
C++
99 lines
3.5 KiB
C++
/**
|
|
* @file aievent.cpp
|
|
* @brief Implementation of AIEvent.
|
|
*
|
|
* Copyright (c) 2011, Aleric Inglewood.
|
|
*
|
|
* 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, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
* There are special exceptions to the terms and conditions of the GPL as
|
|
* it is applied to this Source Code. View the full text of the exception
|
|
* in the file doc/FLOSS-exception.txt in this software distribution.
|
|
*
|
|
* CHANGELOG
|
|
* and additional copyright holders.
|
|
*
|
|
* 19/05/2011
|
|
* Initial version, written by Aleric Inglewood @ SL
|
|
*/
|
|
|
|
#include "linden_common.h"
|
|
#include "aievent.h"
|
|
#include "aistatemachine.h"
|
|
#include <map>
|
|
|
|
// Additional information stored per registered statemachine in AIRegisteredStateMachines std::map.
|
|
struct AIRSData {
|
|
bool mOneShot;
|
|
AIRSData(void) { }
|
|
AIRSData(bool one_shot) : mOneShot(one_shot) { }
|
|
};
|
|
|
|
// A list of all statemachines registered for a particular event, and an API to work on it.
|
|
struct AIRegisteredStateMachines {
|
|
typedef std::map<AIStateMachine*, AIRSData> rsm_type;
|
|
rsm_type mRegisteredStateMachines;
|
|
void Register(AIStateMachine* statemachine, bool one_shot) { mRegisteredStateMachines[statemachine] = one_shot; }
|
|
void Unregister(AIStateMachine* statemachine) { mRegisteredStateMachines.erase(statemachine); }
|
|
void trigger(void);
|
|
};
|
|
|
|
// Inline this, because it's only called from one place.
|
|
inline void AIRegisteredStateMachines::trigger(void)
|
|
{
|
|
rsm_type::iterator sm = mRegisteredStateMachines.begin();
|
|
while(sm != mRegisteredStateMachines.end())
|
|
{
|
|
sm->first->cont(); // This is safe, cont() does never access mRegisteredStateMachines.
|
|
if (sm->second.mOneShot)
|
|
mRegisteredStateMachines.erase(sm++);
|
|
else
|
|
++sm;
|
|
}
|
|
}
|
|
|
|
// A list (array) with all AIRegisteredStateMachines maps, one for each event type.
|
|
static AIThreadSafeSimpleDC<AIRegisteredStateMachines> registered_statemachines_list[AIEvent::number_of_events];
|
|
typedef AIAccess<AIRegisteredStateMachines> registered_statemachines_wat;
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// External API starts here.
|
|
// Each function obtains access to the thread-safe AIRegisteredStateMachines that belongs
|
|
// to the given event (locking it's mutex) and then calls the corresponding method.
|
|
|
|
// Register a statemachine for notification of event.
|
|
// static
|
|
void AIEvent::Register(AIEvents event, AIStateMachine* statemachine, bool one_shot)
|
|
{
|
|
registered_statemachines_wat registered_statemachines_w(registered_statemachines_list[event]);
|
|
registered_statemachines_w->Register(statemachine, one_shot);
|
|
}
|
|
|
|
// Unregister a statemachine for notification of event.
|
|
// static
|
|
void AIEvent::Unregister(AIEvents event, AIStateMachine* statemachine)
|
|
{
|
|
registered_statemachines_wat registered_statemachines_w(registered_statemachines_list[event]);
|
|
registered_statemachines_w->Unregister(statemachine);
|
|
}
|
|
|
|
// Trigger event.
|
|
// static
|
|
void AIEvent::trigger(AIEvents event)
|
|
{
|
|
registered_statemachines_wat registered_statemachines_w(registered_statemachines_list[event]);
|
|
registered_statemachines_w->trigger();
|
|
}
|
|
|