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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 <stdlib.h>
#include <string.h>
#ifndef _WIN32
#include <sys/select.h>
#include <sys/time.h>
#define PLATFD int
#else
#include <winsock2.h>
// order counts
#include <mswsock.h>
#define PLATFD SOCKET
#endif
#include <nng/nng.h>
#include <nuts.h>
const char *addr = "inproc://bug346";
void
repthr(void *arg)
{
nng_socket rep = *(nng_socket *) arg;
nng_listener l;
int ifd;
PLATFD fd;
nng_listen(rep, addr, &l, NNG_FLAG_NONBLOCK);
nng_socket_get_recv_poll_fd(rep, &ifd);
fd = ifd;
for (;;) {
fd_set fset;
struct timeval tmo;
nng_msg *msg;
FD_ZERO(&fset);
FD_SET(fd, &fset);
tmo.tv_sec = 0;
tmo.tv_usec = 20 * 1000; // 20 msec
select(1, &fset, NULL, NULL, &tmo);
for (;;) {
int rv;
rv = nng_recvmsg(rep, &msg, NNG_FLAG_NONBLOCK);
if (rv != 0) {
return;
}
nng_msg_clear(msg);
nng_msg_append_u32(msg, 0);
rv = nng_sendmsg(rep, msg, NNG_FLAG_NONBLOCK);
if (rv == NNG_ECLOSED) {
return;
}
}
}
}
void
reqthr(void *arg)
{
nng_socket req = *(nng_socket *) arg;
nng_dial(req, addr, NULL, NNG_FLAG_NONBLOCK);
int query = 0;
// We just keep pounding out requests, no wait for response.
for (;;) {
int rv;
rv = nng_send(req, &query, sizeof(query), 0);
if (rv == NNG_ECLOSED) {
return;
}
nng_msleep(50);
}
}
#define NCLIENTS 10
nng_socket reqs[NCLIENTS];
nng_socket rep;
static void
test_nonblocking(void)
{
nng_thread *server;
nng_thread *clients[NCLIENTS];
NUTS_PASS(nng_rep0_open(&rep));
for (int i = 0; i < NCLIENTS; i++) {
NUTS_PASS(nng_req0_open(&reqs[i]));
}
NUTS_PASS(nng_thread_create(&server, repthr, &rep));
for (int i = 0; i < NCLIENTS; i++) {
NUTS_PASS(nng_thread_create(&clients[i], reqthr, &reqs[i]));
}
nng_msleep(15000);
nng_socket_close(rep);
nng_thread_destroy(server);
for (int i = 0; i < NCLIENTS; i++) {
nng_socket_close(reqs[i]);
nng_thread_destroy(clients[i]);
}
}
NUTS_TESTS = {
{ "nonblocking", test_nonblocking },
{ NULL, NULL },
};
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