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Add (and use) generic reference counter, to improve signal:noise ratio

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in code defining reference-counted objects.
This commit is contained in:
Michael Brown
2007-04-29 23:53:39 +00:00
parent 36bfb6edbb
commit d40761d725
8 changed files with 128 additions and 58 deletions
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43
src/core/interface.c
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@@ -16,7 +16,6 @@
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <assert.h>
#include <gpxe/interface.h>
/** @file
@@ -25,30 +24,6 @@
*
*/
/**
* Obtain reference to interface
*
* @v intf Interface
* @ret intf Interface
*
* Increases the reference count on the interface.
*/
static struct interface * intf_get ( struct interface *intf ) {
intf->refcnt ( intf, +1 );
return intf;
}
/**
* Drop reference to interface
*
* @v intf Interface
*
* Decreases the reference count on the interface.
*/
static void intf_put ( struct interface *intf ) {
intf->refcnt ( intf, -1 );
}
/**
* Plug an interface into a new destination interface
*
@@ -63,19 +38,7 @@ static void intf_put ( struct interface *intf ) {
* interface into a null interface.
*/
void plug ( struct interface *intf, struct interface *dest ) {
intf_put ( intf->dest );
intf->dest = intf_get ( dest );
}
/**
* Null update reference count
*
* @v intf Interface
* @v delta Change to apply to reference count
*
* Use this as the refcnt() method for an interface that does not need
* to support reference counting.
*/
void null_refcnt ( struct interface *intf __unused, int delta __unused ) {
/* Do nothing */
ref_put ( intf->refcnt );
ref_get ( dest->refcnt );
intf->dest = dest;
}