Manual Reference Pages - atomic_fetch_add (3)
NAME
atomic_fetch_add(3f) - [FORTRAN:INTRINSIC:ATOMIC] Atomic ADD operation with prior fetch
SYNTAX
call atomic_fetch_add(atom, value, old [, stat])
DESCRIPTION
atomic_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.
ARGUMENTS
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.
EXAMPLE
Sample program:
program demo_atomic_fetch_add use iso_fortran_env implicit none integer(atomic_int_kind) :: atom[*], old call atomic_add(atom[1], this_image(), old) end program demo_atomic_fetch_add
STANDARD
[[TS 18508]] or later
CLASS
Atomic subroutine
SEE ALSO
atomic_define(3), atomic_add(3), iso_fortran_env(3), atomic_fetch_and(3), atomic_fetch_or(3), atomic_fetch_xor(3)
| atomic_fetch_add (3) | March 11, 2021 |
