ph_lock_sh
if ((ph_p = ph_lock_sh(sh_p, &return_val)) == NULL)
if ((ph_p = ph_lock_sh(sh_p, &return_val)) == NULL)
if ((ph_p = ph_lock_sh(sh_p, &return_val)) == NULL)
if ((ph_p = ph_lock_sh(sh_p, &return_val)) == NULL)