StackThreads/MP: version 0.77 User's Guide

3.4.4: Fetch and Add

@        int st_fetch_and_add_int(il, ix);
@        long st_fetch_and_add_long(ll, lx);
@                st_int_loc_t * il; int ix;
@                st_long_loc_t * ll; long lx;

st_fetch_and_add_int atomically increments the value written at il by ix and returns the value previously written at il. st_fetch_and_add_long is a similar function for st_long_loc_t *.