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Add reference counting to register/unregister procedure.

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This commit is contained in:
Michael Brown 2007-06-09 17:32:27 +01:00
parent 53bd022235
commit 08e286714f
1 changed files with 32 additions and 0 deletions
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32
src/core/image.c
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@ -23,6 +23,7 @@
#include <errno.h>
#include <assert.h>
#include <gpxe/list.h>
#include <gpxe/umalloc.h>
#include <gpxe/image.h>
/** @file
@ -40,6 +41,35 @@ static struct image_type image_types[0]
static struct image_type image_types_end[0]
__table_end ( struct image_type, image_types );
/**
* Free executable/loadable image
*
* @v refcnt Reference counter
*/
static void free_image ( struct refcnt *refcnt ) {
struct image *image = container_of ( refcnt, struct image, refcnt );
ufree ( image->data );
free ( image );
DBGC ( image, "IMAGE %p freed\n", image );
}
/**
* Allocate executable/loadable image
*
* @ret image Executable/loadable image
*/
struct image * alloc_image ( void ) {
struct image *image;
image = malloc ( sizeof ( *image ) );
if ( image ) {
memset ( image, 0, sizeof ( *image ) );
image->refcnt.free = free_image;
}
return image;
}
/**
* Register executable/loadable image
*
@ -56,6 +86,7 @@ int register_image ( struct image *image ) {
}
/* Add to image list */
image_get ( image );
list_add_tail ( &image->list, &images );
DBGC ( image, "IMAGE %p at [%lx,%lx) registered as %s\n",
image, user_to_phys ( image->data, 0 ),
@ -71,6 +102,7 @@ int register_image ( struct image *image ) {
*/
void unregister_image ( struct image *image ) {
list_del ( &image->list );
image_put ( image );
DBGC ( image, "IMAGE %p unregistered\n", image );
}