1 files changed, 128 insertions, 0 deletions
diff --git a/src/sp/nonblock_test.c b/src/sp/nonblock_test.c
new file mode 100644
index 00000000..0f9be034
--- /dev/null
+++ b/src/sp/nonblock_test.c
@@ -0,0 +1,128 @@
+//
+// Copyright 2024 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 <nng/protocol/reqrep0/rep.h>
+#include <nng/protocol/reqrep0/req.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;
+		char          *msgbuf;
+		size_t         msglen;
+
+		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_recv(rep, &msgbuf, &msglen,
+			    NNG_FLAG_NONBLOCK | NNG_FLAG_ALLOC);
+			if (rv != 0) {
+				return;
+			}
+			nng_free(msgbuf, msglen);
+			int ok = 0;
+			rv     = nng_send(rep, &ok, 4, 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_close(rep);
+	nng_thread_destroy(server);
+	for (int i = 0; i < NCLIENTS; i++) {
+		nng_close(reqs[i]);
+		nng_thread_destroy(clients[i]);
+	}
+}
+
+NUTS_TESTS = {
+	{ "nonblocking", test_nonblocking },
+	{ NULL, NULL },
+};