atomic_add(3f) - [FORTRAN:INTRINSIC] Atomic ADD operation
Syntax
Description
Arguments
Example
Standard
Class
See Also
call atomic_add (atom, value [, stat])
atomic_add(atom, value) atomically 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_envs stat_stopped_image and if the remote image has failed, the value stat_failed_image.
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.
Sample program:
program demo_atomic_add use iso_fortran_env integer(atomic_int_kind) :: atom[*] call atomic_add (atom[1], this_image()) end program demo_atomic_add
[[TS 18508]] or later
Atomic subroutine
[[atomic_define]], [[atomic_fetch_add]], [[iso_fortran_env]], [[atomic_and]], [[atomic_or]], [[atomic_xor]]
atomic_add (3) | March 18, 2019 |