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#include <sys/param.h>
#include <support/mrlock.h>
void
_sx_xfs_destroy(struct sx *sx)
{
if (sx->sx_cnt == -1)
sx_xunlock(sx);
sx_destroy(sx);
}
void
_sx_xfs_lock(struct sx *sx, int type, const char *file, int line)
{
if (type == MR_ACCESS)
_sx_slock(sx, file, line);
else if (type == MR_UPDATE)
_sx_sunlock(sx, file, line);
else
panic("Invalid lock type passed");
}
void
_sx_xfs_unlock(struct sx *sx, const char *file, int line)
{
if (_sx_xfs_xowned(sx))
_sx_xunlock(sx, file, line);
else if (_sx_xfs_sowned(sx))
_sx_sunlock(sx, file, line);
else
panic("lock is not locked");
}
int
ismrlocked(mrlock_t *mrp, int type)
{
if (type == MR_ACCESS)
return _sx_xfs_sowned(mrp); /* Read lock */
else if (type == MR_UPDATE)
return _sx_xfs_xowned(mrp); /* Write lock */
else if (type == (MR_UPDATE | MR_ACCESS))
return _sx_xfs_sowned(mrp) ||
_sx_xfs_xowned(mrp); /* Any type of lock held */
return (mrp->sx_shrd_wcnt > 0 || mrp->sx_excl_wcnt > 0);
}
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