_gfortran_caf_event_query — Query event count ¶Return the event count of the specified event variable.
void _gfortran_caf_event_query (caf_token_t token, size_t index,
int image_index, int *count, int *stat)
| token | intent(in) An opaque pointer identifying the coarray. |
| index | intent(in) Array index; first array index is 0. For scalars, it is always 0. |
| image_index | intent(in) The ID of the remote image; must be a positive number; zero indicates the current image when accessed noncoindexed. |
| count | intent(out) The number of events currently posted to the event variable. |
| stat | intent(out) Stores the STAT=; may be NULL. |
The typical use is to check the local event variable to only call
event_wait when the data is available. However, a coindexed variable
is permitted; there is no ordering or synchronization implied. It acts like
an atomic fetch of the value of the event variable.