broadcaster_t broadcaster_init(xbt_dynar_t host_list, unsigned int piece_count);
int broadcaster_build_chain(broadcaster_t bc);
int broadcaster_send_file(broadcaster_t bc);
broadcaster_t broadcaster_init(xbt_dynar_t host_list, unsigned int piece_count);
int broadcaster_build_chain(broadcaster_t bc);
int broadcaster_send_file(broadcaster_t bc);