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#ifndef _GPXE_INTERFACE_H
#define _GPXE_INTERFACE_H
/** @file
*
* Object communication interfaces
*
*/
FILE_LICENCE ( GPL2_OR_LATER );
#include <gpxe/refcnt.h>
/** An object communication interface */
struct interface {
/** Destination interface
*
* When messages are sent via this interface, they will be
* delivered to the destination interface.
*
* This pointer may never be NULL. When the interface is
* unplugged, it should point to a null interface.
*/
struct interface *dest;
/** Reference counter
*
* If this interface is not part of a reference-counted
* object, this field may be NULL.
*/
struct refcnt *refcnt;
};
/**
* Increment reference count on an interface
*
* @v intf Interface
* @ret intf Interface
*/
static inline __attribute__ (( always_inline )) struct interface *
intf_get ( struct interface *intf ) {
ref_get ( intf->refcnt );
return intf;
}
/**
* Decrement reference count on an interface
*
* @v intf Interface
*/
static inline __attribute__ (( always_inline )) void
intf_put ( struct interface *intf ) {
ref_put ( intf->refcnt );
}
extern void plug ( struct interface *intf, struct interface *dest );
extern void plug_plug ( struct interface *a, struct interface *b );
#endif /* _GPXE_INTERFACE_H */
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