! { dg-do run }
!
! LOCK/UNLOCK check
!
! PR fortran/18918
!

use iso_fortran_env
implicit none

type(lock_type), allocatable :: lock1[:]
type(lock_type), allocatable :: lock2(:,:)[:]
type(lock_type) :: lock3(4)[*]
integer :: stat
logical :: acquired

allocate(lock1[*])
allocate(lock2(2,2)[*])

LOCK(lock1)
UNLOCK(lock1)

LOCK(lock2(1,1))
LOCK(lock2(2,2))
UNLOCK(lock2(1,1))
UNLOCK(lock2(2,2))

LOCK(lock3(3))
LOCK(lock3(4))
UNLOCK(lock3(3))
UNLOCK(lock3(4))

stat = 99
LOCK(lock1, stat=stat)
if (stat /= 0) call abort()

LOCK(lock2(1,1), stat=stat)
if (stat /= 0) call abort()
LOCK(lock2(2,2), stat=stat)
if (stat /= 0) call abort()

LOCK(lock3(3), stat=stat)
if (stat /= 0) call abort()
LOCK(lock3(4), stat=stat)
if (stat /= 0) call abort()

stat = 99
UNLOCK(lock1, stat=stat)
if (stat /= 0) call abort()

UNLOCK(lock2(1,1), stat=stat)
if (stat /= 0) call abort()
UNLOCK(lock2(2,2), stat=stat)
if (stat /= 0) call abort()

UNLOCK(lock3(3), stat=stat)
if (stat /= 0) call abort()
UNLOCK(lock3(4), stat=stat)
if (stat /= 0) call abort()

if (this_image() == 1) then
  acquired = .false.
  LOCK (lock1[this_image()], acquired_lock=acquired)
  if (.not. acquired) call abort()

  acquired = .false.
  LOCK (lock2(1,1)[this_image()], acquired_lock=acquired)
  if (.not. acquired) call abort()

  acquired = .false.
  LOCK (lock2(2,2)[this_image()], acquired_lock=acquired)
  if (.not. acquired) call abort()

  acquired = .false.
  LOCK (lock3(3)[this_image()], acquired_lock=acquired)
  if (.not. acquired) call abort()

  acquired = .false.
  LOCK (lock3(4)[this_image()], acquired_lock=acquired)
  if (.not. acquired) call abort()

  UNLOCK (lock1[1])
  UNLOCK (lock2(1,1)[1])
  UNLOCK (lock2(2,2)[1])
  UNLOCK (lock3(3)[1])
  UNLOCK (lock3(4)[1])
end if
end