Initialize with OpenTTD 1.9.3

src/progress.cpp

@@ -0,0 +1,46 @@
+/* $Id$ */
+
+/*
+ * This file is part of OpenTTD.
+ * 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.
+ * 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.
+ * 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/>.
+ */
+
+/** @file progress.cpp Functions for modal progress windows. */
+
+#include "stdafx.h"
+#include "thread/thread.h"
+
+#include "safeguards.h"
+
+/** Are we in a modal progress or not? */
+bool _in_modal_progress = false;
+bool _first_in_modal_loop = false;
+/** Rights for the performing work. */
+ThreadMutex *_modal_progress_work_mutex = ThreadMutex::New();
+/** Rights for the painting. */
+ThreadMutex *_modal_progress_paint_mutex = ThreadMutex::New();
+
+/**
+ * Set the modal progress state.
+ * @note Makes IsFirstModalProgressLoop return true for the next call.
+ * @param state The new state; are we modal or not?
+ */
+void SetModalProgress(bool state)
+{
+	_in_modal_progress = state;
+	_first_in_modal_loop = true;
+}
+
+/**
+ * Check whether this is the first modal progress loop.
+ * @note Set by SetModalProgress, unset by calling this method.
+ * @return True if this is the first loop.
+ */
+bool IsFirstModalProgressLoop()
+{
+	bool ret = _first_in_modal_loop;
+	_first_in_modal_loop = false;
+	return ret;
+}