Introduce plugin_crt0.c that every plugin links.

It handles exit() properly, calling the handler also when the plugin returns
normally (also it makes exit() more standard compliant while at it).
It also holds PLUGIN_HEADER, so that it doesn't need to be in each plugin anymore.

To work better together with callbacks passed to rb->default_event_handler_ex introduce exit_on_usb() which will call the exit handler before showing the usb screen and exit() after it.
In most cases it was passed a callback which was manually called at all other return points. This can now be done via atexit().

In future plugin_crt0.c could also handle clearing bss, initializing iram and more.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27862 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 5 insertions, 7 deletions

diff --git a/apps/plugins/jackpot.c b/apps/plugins/jackpot.c
index 56c2910b70..abf1cf8fb2 100644
--- a/apps/plugins/jackpot.c
+++ b/apps/plugins/jackpot.c
@@ -22,8 +22,9 @@
 #include "plugin.h"
 #include "lib/pluginlib_actions.h"
 #include "lib/picture.h"
+#include "lib/pluginlib_exit.h"
+
 
-PLUGIN_HEADER
 
 const struct button_mapping* plugin_contexts[]={pla_main_ctx};
 #define NB_PICTURES 9
@@ -109,9 +110,8 @@ void patterns_deinit(struct screen* display)
 #endif /* HAVE_LCD_CHARCELLS */
 
 /*Call when the program exit*/
-void jackpot_exit(void *parameter)
+void jackpot_exit(void)
 {
-    (void)parameter;
 #ifdef HAVE_LCD_CHARCELLS
     patterns_deinit(rb->screens[SCREEN_MAIN]);
 #endif /* HAVE_LCD_CHARCELLS */
@@ -298,6 +298,7 @@ enum plugin_status plugin_start(const void* parameter)
     int action, i;
     struct jackpot game;
     (void)parameter;
+    atexit(jackpot_exit);
     rb->srand(*rb->current_tick);
 #ifdef HAVE_LCD_CHARCELLS
     patterns_init(rb->screens[SCREEN_MAIN]);
@@ -323,12 +324,9 @@ enum plugin_status plugin_start(const void* parameter)
                 break;
 
             default:
-                if (rb->default_event_handler_ex(action, jackpot_exit, NULL)
-                    == SYS_USB_CONNECTED)
-                    return PLUGIN_USB_CONNECTED;
+                exit_on_usb(action);
                 break;
         }
     }
-    jackpot_exit(NULL);
     return PLUGIN_OK;
 }