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Manual Reference Pages  - atomic_fetch_or (3)

NAME
atomic_fetch_or(3f) - [FORTRAN:INTRINSIC:ATOMIC:BIT MANIPULATION] Atomic bitwise OR operation with prior fetch

SYNTAX
call atomic_fetch_or(atom, value, old [, stat])

DESCRIPTION
atomic_fetch_or(atom, value, old) atomically stores the value of ATOM in OLD and defines ATOM with the bitwise OR between the values of ATOM and VALUE. When STAT is present and the invocation was successful, it is assigned the value 0. If it is present and the invocation has failed, it is assigned a positive value; in particular, for a coindexed ATOM, if the remote image has stopped, it is assigned the value of iso_fortran_env’s stat_stopped_image and if the remote image has failed, the value stat_failed_image.

ARGUMENTS
ATOM Scalar coarray or coindexed variable of integer type with atomic_int_kind kind.
VALUE Scalar of the same type as ATOM. If the kind is different, the value is converted to the kind of ATOM.
OLD Scalar of the same type and kind as ATOM.
STAT (optional) Scalar default-kind integer variable.

EXAMPLE
Sample program: 

   program demo_atomic_fetch_or
   use iso_fortran_env
   implicit none
   integer(atomic_int_kind) :: atom[*], old
      call atomic_fetch_or(atom[1], int(b’10100011101’), old)
   end program demo_atomic_fetch_or

STANDARD
[[TS 18508]] or later

CLASS
Atomic subroutine

SEE ALSO
atomic_define(3), atomic_or(3), iso_fortran_env(3), atomic_fetch_add(3), atomic_fetch_and(3), atomic_fetch_xor(3)

atomic_fetch_or (3) March 11, 2021
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