mirror of
https://github.com/libretro/RetroArch
synced 2024-07-08 12:15:49 +00:00
87 lines
3.0 KiB
C++
87 lines
3.0 KiB
C++
/* Copyright (C) 2018-2019 The RetroArch team
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*
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* ---------------------------------------------------------------------------------------
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* The following license statement only applies to this file (uwp_async.h).
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* ---------------------------------------------------------------------------------------
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*
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* Permission is hereby granted, free of charge,
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* to any person obtaining a copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <ppl.h>
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#include <ppltasks.h>
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#include "uwp_main.h"
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#include "uwp_func.h"
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#ifdef __cplusplus
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#ifdef __cplusplus_winrt
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namespace
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{
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/* Dear Microsoft
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* I really appreciate all the effort you took to not provide any
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* synchronous file APIs and block all attempts to synchronously
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* wait for the results of async tasks for "smooth user experience",
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* but I'm not going to run and rewrite all RetroArch cores for
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* async I/O. I hope you like this hack I made instead.
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*/
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template<typename T>
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T RunAsync(std::function<concurrency::task<T>()> func)
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{
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volatile bool finished = false;
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Platform::Exception^ exception = nullptr;
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T result;
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func().then([&finished, &exception, &result](concurrency::task<T> t) {
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try
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{
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result = t.get();
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}
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catch (Platform::Exception ^ exception_)
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{
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exception = exception_;
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}
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finished = true;
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});
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/* Don't stall the UI thread - prevents a deadlock */
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Windows::UI::Core::CoreWindow^ corewindow = Windows::UI::Core::CoreWindow::GetForCurrentThread();
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while (!finished)
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{
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if (corewindow) {
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corewindow->Dispatcher->ProcessEvents(Windows::UI::Core::CoreProcessEventsOption::ProcessAllIfPresent);
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}
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}
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if (exception != nullptr)
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throw exception;
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return result;
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}
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template<typename T>
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T RunAsyncAndCatchErrors(std::function<concurrency::task<T>()> func, T valueOnError)
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{
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try
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{
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return RunAsync<T>(func);
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}
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catch (Platform::Exception ^ e)
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{
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return valueOnError;
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}
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}
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}
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#endif
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#endif
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