_gfortran_caf_atomic_cas — Atomic compare and swap ¶Atomic compare and swap of a kind-4 integer or logical variable. Assigns atomically the specified value to the atomic variable, if the latter has the value specified by the passed condition value.
void _gfortran_caf_atomic_cas (caf_token_t token, size_t offset,
int image_index, void *old, void *compare, void *new_val, int *stat,
int type, int kind)
| token | intent(in) An opaque pointer identifying the coarray. |
| offset | intent(in) By which amount of bytes the actual data is shifted compared to the base address of the coarray. |
| image_index | intent(in) The ID of the remote image; must be a positive number; zero indicates the current image when used noncoindexed. |
| old | intent(out) The value which the atomic variable had just before the cas operation. |
| compare | intent(in) The value used for comparision. |
| new_val | intent(in) The new value for the atomic variable,
assigned to the atomic variable, if compare equals the value of the
atomic variable. |
| stat | intent(out) Stores the status STAT= and may be NULL. |
| type | intent(in) the data type, i.e. BT_INTEGER (1) or
BT_LOGICAL (2). |
| kind | intent(in) The kind value (only 4; always int) |