1001   l_mem work = -cast(l_mem, g->GCmemtrav);  /* start counting work */  in atomic()  local
1011   work += g->GCmemtrav;  /* stop counting (do not (re)count grays) */  in atomic()
1014   work -= g->GCmemtrav;  /* restart counting */  in atomic()
1021   work += g->GCmemtrav;  /* stop counting (objects being finalized) */  in atomic()
1025   work -= g->GCmemtrav;  /* restart counting */  in atomic()
1035   work += g->GCmemtrav;  /* complete counting */  in atomic()
1036   return work;  /* estimate of memory marked by 'atomic' */  in atomic()
1058         lu_mem work;  in singlestep()  local
1062         work = atomic(L);  /* add what was traversed by 'atomic' */  in singlestep()
1063         g->GCestimate += work;  /* estimate of total memory traversed */  in singlestep()
1065         return work + sw * GCSWEEPCOST;  in singlestep()
1148     lu_mem work = singlestep(L);  /* do some work */  in incstep()  local
1149     debt -= work;  in incstep()