mirror of
https://github.com/JGRennison/OpenTTD-patches.git
synced 2024-11-11 13:10:45 +00:00
87 lines
2.8 KiB
C++
87 lines
2.8 KiB
C++
/*
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* This file is part of OpenTTD.
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* 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.
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* 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.
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* 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/>.
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*/
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/** @file progress.cpp Functions for modal progress windows. */
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#include "stdafx.h"
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#include "progress.h"
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#include "video/video_driver.hpp"
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#include <chrono>
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#include <mutex>
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#include <condition_variable>
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#if defined(__MINGW32__)
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#include "3rdparty/mingw-std-threads/mingw.mutex.h"
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#include "3rdparty/mingw-std-threads/mingw.condition_variable.h"
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#endif
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#include "safeguards.h"
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/** Are we in a modal progress or not? */
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bool _in_modal_progress = false;
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bool _first_in_modal_loop = false;
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/** Threading usable for modal progress? */
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bool _use_threaded_modal_progress = true;
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/** Rights for the performing work. */
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std::mutex _modal_progress_work_mutex;
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/** Rights for the painting. */
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std::mutex _modal_progress_paint_mutex;
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static std::mutex _modal_progress_cv_mutex;
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static std::condition_variable _modal_progress_cv;
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/**
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* Set the modal progress state.
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* @note Makes IsFirstModalProgressLoop return true for the next call.
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* @param state The new state; are we modal or not?
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*/
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void SetModalProgress(bool state)
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{
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_modal_progress_cv_mutex.lock();
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_in_modal_progress = state;
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_first_in_modal_loop = true;
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_modal_progress_cv_mutex.unlock();
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if (!state) _modal_progress_cv.notify_all();
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}
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/**
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* Check whether this is the first modal progress loop.
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* @note Set by SetModalProgress, unset by calling this method.
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* @return True if this is the first loop.
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*/
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bool IsFirstModalProgressLoop()
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{
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bool ret = _first_in_modal_loop;
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_first_in_modal_loop = false;
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return ret;
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}
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void SleepWhileModalProgress(int milliseconds)
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{
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std::unique_lock<std::mutex> lk(_modal_progress_cv_mutex);
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_modal_progress_cv.wait_for(lk, std::chrono::milliseconds(milliseconds), []{ return !_in_modal_progress; });
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}
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void WaitUntilModalProgressCompleted()
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{
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if (HasModalProgress()) {
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_modal_progress_paint_mutex.unlock();
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_modal_progress_work_mutex.unlock();
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{
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std::unique_lock<std::mutex> lk(_modal_progress_cv_mutex);
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_modal_progress_cv.wait(lk, []{ return !_in_modal_progress; });
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}
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/* Modal progress thread may need blitter access while we are waiting for it. */
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VideoDriver::GetInstance()->ReleaseBlitterLock();
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_modal_progress_paint_mutex.lock();
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VideoDriver::GetInstance()->AcquireBlitterLock();
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_modal_progress_work_mutex.lock();
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}
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}
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