_gfortran_caf_sync_memory — Wait for completion of segment-memory operations ¶void _gfortran_caf_sync_memory (int *stat, char *errmsg, size_t errmsg_len)
Acts as optimization barrier between different segments. It also ensures that all pending memory operations of this image have been completed.
| stat | intent(out) Stores the status STAT= and may be NULL. |
| errmsg | intent(out) When an error occurs, this is set to an error message; may be NULL. |
| errmsg_len | intent(in) the buffer size of errmsg |
A simple implementation could be
__asm__ __volatile__ ("":::"memory") to prevent code movements.