8.2.24 _gfortran_caf_sync_memory — Wait for completion of segment-memory operations

Description:

Acts as optimization barrier between different segments. It also ensures that all pending memory operations of this image have been completed.

Syntax:

void _gfortran_caf_sync_memory (int *stat, char *errmsg, size_t errmsg_len)

Arguments:

stat	intent(out) Stores the status STAT= and may be NULL.
errmsg	intent(out) When an error occurs, this will be set to an error message; may be NULL.
errmsg_len	intent(in) the buffer size of errmsg

NOTE A simple implementation could be

__asm__ __volatile__ ("":::"memory") to prevent code movements.