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MacOS requires some UI-related API calls to happen on the main thread. There are several SDL functions that call UI-things, and those were, since #500 /08b4d96cf2, in a separate thread. This crashes on Catalina, instead of simply warning (see #5470). It is not the first time we had such issues, as originally the Engine was on the main thread and AtlasUI on a separate thread. That didn't work on MacOS, so the threading was inverted in #500 /08b4d96cf2, with AtlasUI on the main thread and the Engine in another thread. Unfortunately, this still wasn't enough. This formally unthreads the engine, running it on a wxTimer, to avoid these issues. Future work should focus on: - Further decoupling the simulation from the engine itself, as what Atlas really needs is a threaded simulation, not a threaded engine. - Making the simulation itself more threaded - Making it possible to do tasks asynchronously under Atlas. Refs #500 Fixes #5470 Differential Revision: https://code.wildfiregames.com/D2752 This was SVN commit r24361.
47 lines
1.3 KiB
C++
47 lines
1.3 KiB
C++
/* Copyright (C) 2009 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef INCLUDED_MESSAGEPASSER
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#define INCLUDED_MESSAGEPASSER
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#include "SharedMemory.h"
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namespace AtlasMessage
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{
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struct IMessage;
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struct QueryMessage;
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class MessagePasser
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{
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public:
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virtual ~MessagePasser() {}
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virtual void Add(IMessage*) = 0;
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// takes ownership of IMessage object
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virtual void Query(QueryMessage*, void(*timeoutCallback)()) = 0;
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// blocks; caller retains ownership of QueryMessage object
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};
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extern MessagePasser* g_MessagePasser;
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#define POST_MESSAGE(type, data) AtlasMessage::g_MessagePasser->Add(SHAREABLE_NEW(AtlasMessage::m##type, data))
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}
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#endif // INCLUDED_MESSAGEPASSER
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