|REFCNT_INIT(9)||Kernel Developer's Manual||REFCNT_INIT(9)|
reference count API
refcnt *r, const char
The refcnt API provides simple reference counters that can be used to manage the lifetime of a shared object.
sets the initial value of the counter to 1 to account for the caller's
reference to the object.
is used to acquire a new reference. It is the responsibility of the caller
to guarantee that it holds a valid reference before taking a new
is used to release an existing reference.
is used to release an existing reference and wakes up a process that is
currently waiting in
refcnt_finalize() for all the
references to released.
releases the caller's reference and sleeps until all the other references to
the relevant object have been released. There may only be one caller to
refcnt_finalize() per refcnt
initialises a declaration of a refcnt to 1.
refcnt_rele_wake() can be called during autoconf,
from process context, or from interrupt context.
refcnt_finalize() can be called from
refcnt_rele() returns a non-zero value if
the last reference has been released, otherwise 0.
|September 11, 2015||OpenBSD-current|