Method LoadFileAsync

primedev/mods/modsavefiles.cpp:141–185

// Loads a file asynchronously.
template <ScriptContext context> int SaveFileManager::LoadFileAsync(fs::path file)
{
	int handle = ++m_iLastRequestHandle;
	auto mutex = std::ref(fileMutex);
	std::thread readThread(
		[mutex, file, handle]()
		{
			try
			{
				mutex.get().lock();

				std::ifstream fileStr(file);
				if (fileStr.fail())
				{
					spdlog::error("A file was supposed to be loaded but we can't access it?!");

					g_pSquirrel[context]->AsyncCall("NSHandleLoadResult", handle, false, "");
					mutex.get().unlock();
					return;
				}

				std::stringstream stringStream;
				stringStream << fileStr.rdbuf();

				g_pSquirrel[context]->AsyncCall("NSHandleLoadResult", handle, true, stringStream.str());

				fileStr.close();
				mutex.get().unlock();
				// side-note: this causes a leak?
				// when a file is added to the map, it's never removed.
				// no idea how to fix this - because we have no way to check if there are other threads waiting to use this file(?)
				// tried to use m.try_lock(), but it's unreliable, it seems.
			}
			catch (std::exception ex)
			{
				spdlog::error("LOAD FAILED!");
				g_pSquirrel[context]->AsyncCall("NSHandleLoadResult", handle, false, "");
				mutex.get().unlock();
				spdlog::error(ex.what());
			}
		});

	readThread.detach();
	return handle;
}

// Deletes a file asynchronously.
template <ScriptContext context> void SaveFileManager::DeleteFileAsync(fs::path file)