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Introduce plugin_crt0.c that every plugin links.

Browse source 
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
This commit is contained in:
Thomas Martitz 2010-08-23 16:56:49 +00:00
parent 8106c9dc64
commit abdc5935be
142 changed files with 372 additions and 341 deletions
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20
apps/plugins/fractals/fractal.c
View file

@ -29,6 +29,7 @@
#include "fractal_rect.h"
#include "fractal_sets.h"
#include "mandelbrot_set.h"
#include "lib/pluginlib_exit.h"
#ifdef USEGSLIB
GREY_INFO_STRUCT
@ -41,7 +42,7 @@ static size_t gbuf_size = 0;
#define REDRAW_FULL 2
#define REDRAW_FULL_OVERLAY 3
PLUGIN_HEADER
/* returns 1 if a button has been pressed, 0 otherwise */
static int button_yield(void *ctx)
@ -85,9 +86,8 @@ static int button_yield(void *ctx)
}
}
static void cleanup(void *parameter)
static void cleanup(void)
{
(void)parameter;
#ifdef USEGSLIB
grey_release();
#endif
@ -109,11 +109,13 @@ enum plugin_status plugin_start(const void* parameter)
if (!grey_init(gbuf, gbuf_size, GREY_ON_COP, LCD_WIDTH, LCD_HEIGHT, NULL))
{
rb->splash(HZ, "Couldn't init greyscale display");
return 0;
return PLUGIN_ERROR;
}
grey_show(true); /* switch on greyscale overlay */
#endif
/* release greylib on exit */
atexit(cleanup);
#if LCD_DEPTH > 1
rb->lcd_set_backdrop(NULL);
#endif
@ -161,9 +163,6 @@ enum plugin_status plugin_start(const void* parameter)
case FRACTAL_RC_QUIT:
#endif
case FRACTAL_QUIT:
#ifdef USEGSLIB
grey_release();
#endif
return PLUGIN_OK;
case FRACTAL_ZOOM_OUT:
@ -246,18 +245,13 @@ enum plugin_status plugin_start(const void* parameter)
break;
default:
if (rb->default_event_handler_ex(button, cleanup, NULL)
== SYS_USB_CONNECTED)
return PLUGIN_USB_CONNECTED;
exit_on_usb(button);
break;
}
if (button != BUTTON_NONE)
lastbutton = button;
}
#ifdef USEGSLIB
grey_release();
#endif
return PLUGIN_OK;
}