devs/foxbox
1
0
Fork 0
forked from len0rd/rockbox
Code Pull requests Activity

Second try: Introduce plugin_crt0.c that every plugin links.

Browse source 
It handles exit() properly, calling the handler also when the plugin returns
normally (also make 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 rb->default_event_handler_ex() 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@27873 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Thomas Martitz 2010-08-24 14:30:46 +00:00
parent 3478bc5d6d
commit cae4ae2c71
142 changed files with 372 additions and 341 deletions
Download patch file Download diff file Expand all files Collapse all files

1
apps/plugins/lib/SOURCES
View file

@ -2,7 +2,6 @@ gcc-support.c
pluginlib_actions.c
helper.c
md5.c
pluginlib_exit.c
jhash.c
configfile.c
fixedpoint.c

25
apps/plugins/lib/pluginlib_exit.c
View file

@ -1,25 +0,0 @@
/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2009 by Maurus Cuelenaere
*
* This program 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; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "pluginlib_exit.h"
jmp_buf __exit_env DATA_ATTR;

48
apps/plugins/lib/pluginlib_exit.h
View file

@ -22,31 +22,33 @@
#ifndef __PLUGINLIB_EXIT_H__
#define __PLUGINLIB_EXIT_H__
#include "config.h"
#include <setjmp.h>
/* make sure we are in sync with the real definitions, especially on
* hosted systems */
#include <stdlib.h>
#include "gcc_extensions.h"
#define _PLUGINLIB_EXIT_INIT(atexit) switch(setjmp(__exit_env)) \
{ \
case 1: \
atexit \
return PLUGIN_OK; \
case 2: \
atexit \
return PLUGIN_ERROR; \
case 0: \
default: \
break; \
}
/* these are actually implemented in plugin_crt0.c which all plugins link */
extern int atexit(void (*func)(void));
extern void exit(int status) NORETURN_ATTR;
/* these don't call the exit handlers */
extern void _exit(int status) NORETURN_ATTR;
/* C99 version */
#define _Exit _exit
/* Either PLUGINLIB_EXIT_INIT or PLUGINLIB_EXIT_INIT_ATEXIT needs to be placed
* as the first line in plugin_start. The _ATEXIT version will call the named
* no-argument function when exit() is called before exiting the plugin, to
* allow for cleanup.
#ifndef EXIT_SUCCESS
#define EXIT_SUCCESS 0
#define EXIT_FAILURE 1
#endif
/**
* helper function to handle USB connected events coming from
* button_get()
*
* it will exit the plugin if usb is detected, but it will call the atexit func
* before actually showing the usb screen
*
* it additionally handles power off as well, with the same behavior
*/
#define PLUGINLIB_EXIT_INIT _PLUGINLIB_EXIT_INIT()
#define PLUGINLIB_EXIT_INIT_ATEXIT(atexit) _PLUGINLIB_EXIT_INIT(atexit();)
extern jmp_buf __exit_env;
#define exit(status) longjmp(__exit_env, status != 0 ? 2 : 1)
extern void exit_on_usb(int button);
#endif /* __PLUGINLIB_EXIT_H__ */