//
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// Copyright 2021 Staysail Systems, Inc. <info@staysail.tech>
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// Copyright 2018 Capitar IT Group BV <info@capitar.com>
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//
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// This software is supplied under the terms of the MIT License, a
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// copy of which should be located in the distribution where this
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// file was obtained (LICENSE.txt). A copy of the license may also be
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// found online at https://opensource.org/licenses/MIT.
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//
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#include <string.h>
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#include <nng/nng.h>
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#include <nng/protocol/reqrep0/rep.h>
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#include <nng/protocol/reqrep0/req.h>
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#include <nng/supplemental/util/platform.h>
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#include "convey.h"
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#include "stubs.h"
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static int nclients = 200;
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static char *addr = "inproc:///atscale";
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nng_socket rep;
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nng_thread * server;
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void
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serve(void *arg)
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{
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nng_msg *msg;
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(void) arg; // unused
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for (;;) {
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msg = NULL;
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if ((nng_recvmsg(rep, &msg, 0) != 0) ||
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(nng_sendmsg(rep, msg, 0) != 0)) {
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break;
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}
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}
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if (msg != NULL) {
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nng_msg_free(msg);
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}
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nng_close(rep);
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}
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int
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openclients(nng_socket *clients, int num)
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{
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int rv;
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int i;
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nng_duration t;
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for (i = 0; i < num; i++) {
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t = 100; // 100ms
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nng_socket c;
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if (((rv = nng_req_open(&c)) != 0) ||
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((rv = nng_setopt_ms(c, NNG_OPT_RECVTIMEO, t)) != 0) ||
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((rv = nng_setopt_ms(c, NNG_OPT_SENDTIMEO, t)) != 0) ||
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((rv = nng_dial(c, addr, NULL, 0)) != 0)) {
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return (rv);
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}
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clients[i] = c;
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}
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return (0);
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}
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int
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transact(nng_socket *clients, int num)
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{
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nng_msg *msg;
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int rv;
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int i;
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for (i = 0; i < num; i++) {
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if (((rv = nng_msg_alloc(&msg, 0)) != 0) ||
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((rv = nng_sendmsg(clients[i], msg, 0)) != 0) ||
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((rv = nng_recvmsg(clients[i], &msg, 0)) != 0)) {
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// We may leak a message, but this is an
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// error case anyway.
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break;
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}
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nng_msg_free(msg);
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msg = NULL;
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}
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return (rv);
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}
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Main({
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nng_socket *clients;
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int * results;
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clients = calloc(nclients, sizeof(nng_socket));
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results = calloc(nclients, sizeof(int));
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if ((nng_rep_open(&rep) != 0) ||
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(nng_setopt_int(rep, NNG_OPT_RECVBUF, 256) != 0) ||
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(nng_setopt_int(rep, NNG_OPT_SENDBUF, 256) != 0) ||
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(nng_listen(rep, addr, NULL, 0) != 0) ||
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(nng_thread_create(&server, serve, NULL) != 0)) {
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fprintf(stderr, "Unable to set up server!\n");
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exit(1);
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}
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Test("Scalability", {
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Convey("We can handle many many clients", {
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int i;
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So(openclients(clients, nclients) == 0);
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So(transact(clients, nclients) == 0);
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for (i = 0; i < nclients; i++) {
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So(nng_close(clients[i]) == 0);
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}
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});
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});
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nng_close(rep);
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nng_thread_destroy(server);
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free(clients);
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free(results);
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})
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