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ATOMIC_REF
— Obtaining the value of a variable atomicallyATOMIC_DEFINE(ATOM, VALUE)
atomically assigns the value of the
variable ATOM to 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
.
Fortran 2008 and later; with STAT, TS 18508 or later
Atomic subroutine
CALL ATOMIC_REF(VALUE, ATOM [, STAT])
VALUE | Scalar of the same type as ATOM. If the kind is different, the value is converted to the kind of ATOM. |
ATOM | Scalar coarray or coindexed variable of either integer
type with ATOMIC_INT_KIND kind or logical type with
ATOMIC_LOGICAL_KIND kind. |
STAT | (optional) Scalar default-kind integer variable. |
program atomic use iso_fortran_env logical(atomic_logical_kind) :: atom[*] logical :: val call atomic_ref (atom, .false.) ! ... call atomic_ref (atom, val) if (val) then print *, "Obtained" end if end program atomic
ATOMIC_DEFINE, ATOMIC_CAS, ISO_FORTRAN_ENV, ATOMIC_FETCH_ADD, ATOMIC_FETCH_AND, ATOMIC_FETCH_OR, ATOMIC_FETCH_XOR