if (host_number == 0){ //master send then receive
sprintf(mailbox, "%d", host_number+1);
task = MSG_task_create("Token", task_comp_size, task_comm_size, NULL);
if (host_number == 0){ //master send then receive
sprintf(mailbox, "%d", host_number+1);
task = MSG_task_create("Token", task_comp_size, task_comm_size, NULL);