59 lines
1.3 KiB
C
59 lines
1.3 KiB
C
#ifndef _GPXE_HOTPLUG_H
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#define _GPXE_HOTPLUG_H
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/** @file
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*
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* Hotplug support
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*
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*/
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#include <gpxe/list.h>
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/**
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* A persistent reference to another data structure
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*
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* This data structure should be embedded within any data structure
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* (the referrer) which holds a persistent reference to a separate,
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* volatile data structure (the referee).
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*/
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struct reference {
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/** List of persistent references */
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struct list_head list;
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/** Forget persistent reference
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*
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* @v ref Persistent reference
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*
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* This method is called immediately before the referred-to
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* data structure is destroyed. The reference holder must
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* forget all references to the referee before returning from
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* this method.
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*
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* This method must also call ref_del() to remove the
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* reference.
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*/
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void ( * forget ) ( struct reference *ref );
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};
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/**
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* Add persistent reference
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*
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* @v ref Persistent reference
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* @v list List of persistent references
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*/
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static inline void ref_add ( struct reference *ref, struct list_head *list ) {
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list_add ( &ref->list, list );
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}
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/**
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* Remove persistent reference
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*
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* @v ref Persistent reference
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*/
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static inline void ref_del ( struct reference *ref ) {
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list_del ( &ref->list );
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}
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extern void forget_references ( struct list_head *list );
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#endif /* _GPXE_HOTPLUG_H */
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