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//
// Copyright 2025 Staysail Systems, Inc. <info@staysail.tech>
// Copyright 2018 Capitar IT Group BV <info@capitar.com>
//
// This software is supplied under the terms of the MIT License, a
// copy of which should be located in the distribution where this
// file was obtained (LICENSE.txt). A copy of the license may also be
// found online at https://opensource.org/licenses/MIT.
//
#include <string.h>
#include <nng/nng.h>
#include <nuts.h>
static int nclients = 200;
static char *addr = "inproc:///atscale";
nng_socket rep;
nng_thread *server;
void
serve(void *arg)
{
nng_msg *msg;
(void) arg; // unused
for (;;) {
msg = NULL;
if ((nng_recvmsg(rep, &msg, 0) != 0) ||
(nng_sendmsg(rep, msg, 0) != 0)) {
break;
}
}
if (msg != NULL) {
nng_msg_free(msg);
}
nng_socket_close(rep);
}
int
openclients(nng_socket *clients, int num)
{
int i;
nng_duration t;
for (i = 0; i < num; i++) {
t = 100; // 100ms
nng_socket c;
NUTS_PASS(nng_req0_open(&c));
NUTS_PASS(nng_socket_set_ms(c, NNG_OPT_RECVTIMEO, t));
NUTS_PASS(nng_socket_set_ms(c, NNG_OPT_SENDTIMEO, t));
NUTS_PASS(nng_dial(c, addr, NULL, 0));
clients[i] = c;
}
return (0);
}
int
transact(nng_socket *clients, int num)
{
nng_msg *msg;
int rv = 0;
int i;
for (i = 0; i < num; i++) {
if (((rv = nng_msg_alloc(&msg, 0)) != 0) ||
((rv = nng_sendmsg(clients[i], msg, 0)) != 0) ||
((rv = nng_recvmsg(clients[i], &msg, 0)) != 0)) {
// We may leak a message, but this is an
// error case anyway.
break;
}
nng_msg_free(msg);
msg = NULL;
}
return (rv);
}
void
test_scalability(void)
{
nng_socket *clients;
int *results;
clients = calloc(nclients, sizeof(nng_socket));
results = calloc(nclients, sizeof(int));
NUTS_PASS(nng_rep0_open(&rep));
NUTS_PASS(nng_socket_set_int(rep, NNG_OPT_RECVBUF, 256));
NUTS_PASS(nng_socket_set_int(rep, NNG_OPT_SENDBUF, 256));
NUTS_PASS(nng_listen(rep, addr, NULL, 0));
NUTS_PASS(nng_thread_create(&server, serve, NULL));
int i;
NUTS_TRUE(openclients(clients, nclients) == 0);
NUTS_TRUE(transact(clients, nclients) == 0);
for (i = 0; i < nclients; i++) {
NUTS_CLOSE(clients[i]);
}
NUTS_CLOSE(rep);
nng_thread_destroy(server);
free(clients);
free(results);
}
NUTS_TESTS = {
{ "scalability", test_scalability },
{ NULL, NULL },
};
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