|
Unix VPS
Support
FAQ
Network
Miscellaneous
|
| G_WITHER_GEOM(9) | FreeBSD Kernel Developer's Manual | G_WITHER_GEOM(9) |
NAME
g_wither_geom —
SYNOPSIS
#include <geom/geom.h>
void
g_wither_geom(struct
g_geom *gp, int
error);
DESCRIPTION
Theg_wither_geom() function tells GEOM that geom
gp is to be destroyed. GEOM sets an error on each
provider of the given geom (in the orphaning process) and waits for a chance
to destroy the geom. If the access count of any possessed consumer goes to 0,
the consumer will be detached and destroyed automatically. If the last
consumer attached to any possessed provider will be detached, the provider
will be destroyed. If there are no more providers nor consumers, the geom will
be destroyed.
This is an automatic “garbage collect” to avoid
duplicated code in all classes. Before it is called, field
softc should be disposed of and set to
NULL. Note that the
g_wither_geom() function gives no guarantee that the
geom will be immediately destroyed, mostly because the access counts of the
geom's consumers and providers may not be 0. That is why calling this
function for every geom from a given class is not enough to be sure that the
class can be unloaded.
RESTRICTIONS/CONDITIONS
The argument error must be nonzero.The topology lock has to be held.
SEE ALSO
geom(4), DECLARE_GEOM_CLASS(9), g_access(9), g_attach(9), g_bio(9), g_consumer(9), g_data(9), g_event(9), g_geom(9), g_provider(9), g_provider_by_name(9)AUTHORS
This manual page was written by Pawel Jakub Dawidek <pjd@FreeBSD.org>.| January 16, 2004 | FreeBSD 13.1-RELEASE |
Visit the GSP FreeBSD Man Page Interface.
Output converted with ManDoc.