ATOMIC_OR (The GNU Fortran Compiler)

### 8.40 `ATOMIC_OR` — Atomic bitwise OR operation ¶

Synopsis:

  `CALL ATOMIC_OR (ATOM, VALUE [, STAT])`

Description:

  `ATOMIC_OR(ATOM, VALUE)` atomically defines ATOM with the bitwise AND 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`.

Class:

  Atomic subroutine

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.
  STAT | (optional) Scalar default-kind integer variable.

Example:

      program atomic
        use iso_fortran_env
        integer(atomic_int_kind) :: atom[*]
        call atomic_or (atom[1], int(b'10100011101'))
      end program atomic

Standard:

  TS 18508 or later

See also:

  `ATOMIC_DEFINE` — Setting a variable atomically,
  `ATOMIC_FETCH_OR` — Atomic bitwise OR operation with prior fetch,
  `ISO_FORTRAN_ENV`,
  `ATOMIC_ADD` — Atomic ADD operation,
  `ATOMIC_OR` — Atomic bitwise OR operation,
  `ATOMIC_XOR` — Atomic bitwise OR operation