+ double rate)
+{
+#define cost_or_zero(array,pos) ((array)?(array)[pos]:0.0)
+ if ((workstation_nb == 1)
+ && (cost_or_zero(communication_amount, 0) == 0.0))
+ return ws_execute(workstation_list[0], computation_amount[0]);
+ else if ((workstation_nb == 1)
+ && (cost_or_zero(computation_amount, 0) == 0.0))
+ return ws_communicate(workstation_list[0], workstation_list[0],communication_amount[0], rate);
+ else if ((workstation_nb == 2)
+ && (cost_or_zero(computation_amount, 0) == 0.0)
+ && (cost_or_zero(computation_amount, 1) == 0.0)) {
+ int i,nb = 0;
+ double value = 0.0;
+
+ for (i = 0; i < workstation_nb * workstation_nb; i++) {
+ if (cost_or_zero(communication_amount, i) > 0.0) {
+ nb++;
+ value = cost_or_zero(communication_amount, i);
+ }
+ }
+ if (nb == 1)
+ return ws_communicate(workstation_list[0], workstation_list[1],value, rate);
+ }
+#undef cost_or_zero
+