freebsd-nq/modules/spl/spl-rwlock.c
behlendo f4b377415b Reorganize /include/ to add a /sys/, this way we don't need to
muck with #includes in existing Solaris style source to get it
to find the right stuff.



git-svn-id: https://outreach.scidac.gov/svn/spl/trunk@18 7e1ea52c-4ff2-0310-8f11-9dd32ca42a1c
2008-03-01 00:45:59 +00:00

42 lines
541 B
C

#include <sys/rwlock.h>
int
rw_lock_held(krwlock_t *rwlp)
{
BUG_ON(rwlp->rw_magic != RW_MAGIC);
#ifdef CONFIG_RWSEM_GENERIC_SPINLOCK
if (rwlp->rw_sem.activity != 0) {
#else
if (rwlp->rw_sem.count != 0) {
#endif
return 1;
}
return 0;
}
int
rw_read_held(krwlock_t *rwlp)
{
BUG_ON(rwlp->rw_magic != RW_MAGIC);
if (rw_lock_held(rwlp) && rwlp->rw_owner == NULL) {
return 1;
}
return 0;
}
int
rw_write_held(krwlock_t *rwlp)
{
BUG_ON(rwlp->rw_magic != RW_MAGIC);
if (rwlp->rw_owner == current) {
return 1;
}
return 0;
}