gistfile1.txt

int main(int argc, char** argv)
{
	if (argc >= 2 && strcmp(argv[1], "netns-bench") == 0) {
		flag_debug = false;
		flag_net_injection = true;
		flag_net_devices = true;
		flag_wifi = true;
		const int procs = std::max(1, atoi(argc >= 3 ? argv[2] : ""));
		static int ops = 0;
		for (int i = 0; i < procs; i++) {
			pthread_t th;
			pthread_create(
			    &th, 0, [](void* arg) -> void* {
				    int me = (int)(long)arg;
				    for (;; __atomic_fetch_add(&ops, 1, __ATOMIC_RELAXED)) {
					    int pid = fork();
					    if (pid < 0)
						    fail("fork failed");
					    if (pid == 0) {
						    procid = me;
						    if (unshare(CLONE_NEWNET))
							    fail("CLONE_NEWNET failed");
						    initialize_tun();
						    initialize_netdevices();
						    initialize_wifi_devices();
						    return 0;
					    }
					    int status = 0;
					    while (waitpid(pid, &status, 0) != pid) {
					    }
					    if (WEXITSTATUS(status))
						    failmsg("subprocess failed", "status=%d", WEXITSTATUS(status));
				    }
				    return 0;
			    },
			    (void*)(long)i);
		}
		for (;; sleep(1))
			printf("ops=%d\n", __atomic_exchange_n(&ops, 0, __ATOMIC_RELAXED));
		return 0;
	}