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ATOMIC_FETCH_ADD
— Atomic ADD operation with prior fetchATOMIC_FETCH_ADD(ATOM, VALUE, OLD)
atomically stores the value of
ATOM in OLD and adds the value of VAR to the
variable ATOM. 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
.
TS 18508 or later
Atomic subroutine
CALL ATOMIC_FETCH_ADD (ATOM, VALUE, old [, STAT])
ATOM | Scalar coarray or coindexed variable of integer
type with ATOMIC_INT_KIND kind.
ATOMIC_LOGICAL_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. |
program atomic use iso_fortran_env integer(atomic_int_kind) :: atom[*], old call atomic_add (atom[1], this_image(), old) end program atomic
ATOMIC_DEFINE, ATOMIC_ADD, ISO_FORTRAN_ENV, ATOMIC_FETCH_AND, ATOMIC_FETCH_OR, ATOMIC_FETCH_XOR