Tests need to be adjusted to do the correct checks now that reference
count is incremented in z_reserve_fd() instead of z_finalize_fd().
test_z_fd_multiple_access in particular has been simplified to
reserving an fd in one thread and freeing it in the other.
Signed-off-by: Vincent Wan <vwan@ti.com>
Add tests that will make sure that refcounting works as expected.
Also fixed two tests that were using the object values before
the fdtable contained proper values. After reserving a fd by
z_reserve_fd(), we can only call z_finalize_fd() or z_free_fd(),
and only after those calls can fetch obj and vtable values.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
