(svn r16242) -Codechange: rework pausing

-Fix [FS#2864]: autopause and manual pausing conflict with eachother
-Fix: new game + pause on new game + autopause make the game not unpause on the first join

src/openttd.h

@@ -5,6 +5,8 @@
 #ifndef OPENTTD_H
 #define OPENTTD_H
 
+#include "core/enum_type.hpp"
+
 enum GameMode {
 	GM_MENU,
 	GM_NORMAL,
@@ -38,6 +40,19 @@ enum {
 extern GameMode _game_mode;
 extern SwitchMode _switch_mode;
 extern bool _exit_game;
-extern int8 _pause_game;
+
+/** Modes of pausing we've got */
+enum PauseMode {
+	PM_UNPAUSED        = 0,      ///< A normal unpaused game
+	PM_PAUSED_NORMAL   = 1 << 0, ///< A game normally paused
+	PM_PAUSED_SAVELOAD = 1 << 1, ///< A game paused for saving/loading
+	PM_PAUSED_JOIN     = 1 << 2, ///< A game paused for 'pause on join'
+	PM_PAUSED_ERROR    = 1 << 3, ///< A game paused because a (critical) error
+};
+DECLARE_ENUM_AS_BIT_SET(PauseMode);
+typedef SimpleTinyEnumT<PauseMode, byte> PauseModeByte;
+
+/** The current pause mode */
+extern PauseModeByte _pause_mode;
 
 #endif /* OPENTTD_H */