00001 /* $Id$ */ 00002 00003 /* 00004 * This file is part of OpenTTD. 00005 * OpenTTD 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, version 2. 00006 * OpenTTD 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. 00007 * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>. 00008 */ 00009 00012 #include "../../stdafx.h" 00013 #include "ai_event_types.hpp" 00014 00015 #include <queue> 00016 00017 struct AIEventData { 00018 std::queue<AIEvent *> stack; 00019 }; 00020 00021 /* static */ void AIEventController::CreateEventPointer() 00022 { 00023 assert(AIObject::GetEventPointer() == NULL); 00024 00025 AIObject::GetEventPointer() = new AIEventData(); 00026 } 00027 00028 /* static */ void AIEventController::FreeEventPointer() 00029 { 00030 AIEventData *data = (AIEventData *)AIObject::GetEventPointer(); 00031 00032 /* Free all waiting events (if any) */ 00033 while (!data->stack.empty()) { 00034 AIEvent *e = data->stack.front(); 00035 data->stack.pop(); 00036 e->Release(); 00037 } 00038 00039 /* Now kill our data pointer */ 00040 delete data; 00041 } 00042 00043 /* static */ bool AIEventController::IsEventWaiting() 00044 { 00045 if (AIObject::GetEventPointer() == NULL) AIEventController::CreateEventPointer(); 00046 AIEventData *data = (AIEventData *)AIObject::GetEventPointer(); 00047 00048 return !data->stack.empty(); 00049 } 00050 00051 /* static */ AIEvent *AIEventController::GetNextEvent() 00052 { 00053 if (AIObject::GetEventPointer() == NULL) AIEventController::CreateEventPointer(); 00054 AIEventData *data = (AIEventData *)AIObject::GetEventPointer(); 00055 00056 if (data->stack.empty()) return NULL; 00057 00058 AIEvent *e = data->stack.front(); 00059 data->stack.pop(); 00060 return e; 00061 } 00062 00063 /* static */ void AIEventController::InsertEvent(AIEvent *event) 00064 { 00065 if (AIObject::GetEventPointer() == NULL) AIEventController::CreateEventPointer(); 00066 AIEventData *data = (AIEventData *)AIObject::GetEventPointer(); 00067 00068 event->AddRef(); 00069 data->stack.push(event); 00070 } 00071