! syncimages test
!
! Copyright (c) 2012-2014, Sourcery, Inc.
! All rights reserved.
!
! Redistribution and use in source and binary forms, with or without
! modification, are permitted provided that the following conditions are met:
!     * Redistributions of source code must retain the above copyright
!       notice, this list of conditions and the following disclaimer.
!     * Redistributions in binary form must reproduce the above copyright
!       notice, this list of conditions and the following disclaimer in the
!       documentation and/or other materials provided with the distribution.
!     * Neither the name of the Sourcery, Inc., nor the
!       names of its contributors may be used to endorse or promote products
!       derived from this software without specific prior written permission.
!
! THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
! ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
! WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
! DISCLAIMED. IN NO EVENT SHALL SOURCERY, INC., BE LIABLE FOR ANY
! DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
! (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
! LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
! ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
!
program syncimages
  implicit none

  integer :: me,ne,i
  integer :: p[*] = 0
  logical :: test[*] = .true.

  me = this_image()
  ne = num_images()

  if(me == 1) then
    p = 1
  else
    sync images( me-1 )
    p = p[me-1] +1
  endif

  if(me<ne) sync images( me+1 )

  if(me /= p) test = .false.

  sync all

  if(me == 1) then
    do i=1,ne
      if(test[i].eqv..false.) error stop "Test failed."
    enddo
  endif

  if(me==1) print *,"Test passed."

end program
