自学教程：C++ zsocket_connect函数代码示例

//  Worker using REQ socket to do load-balancing//static void *worker_task(void *args){	zctx_t *ctx = zctx_new();	void *worker = zsocket_new(ctx, ZMQ_REQ);#if (defined (WIN32))	zsocket_connect(worker, "tcp://localhost:5673"); // backend#else	zsocket_connect(worker, "ipc://backend.ipc");#endif	//  Tell broker we're ready for work	zframe_t *frame = zframe_new(WORKER_READY, strlen(WORKER_READY));	zframe_send(&frame, worker, 0);	//  Process messages as they arrive	while (1) {		zmsg_t *msg = zmsg_recv(worker);		if (!msg)			break;              //  Interrupted		zframe_print(zmsg_last(msg), "Worker: ");		zframe_reset(zmsg_last(msg), "OK", 2);		zmsg_send(&msg, worker);	}	zctx_destroy(&ctx);	return NULL;}

intmain (int argc, char *argv[]){    if (argc != 3) {        exit (-1);    }    int numb_msgs = atoi (argv[2]);    zctx_t *ctx = zctx_new ();    void *dealer = zsocket_new (ctx, ZMQ_DEALER);    zsocket_set_linger (dealer, -1);    zsocket_connect (dealer, "%s:9000", argv[1]);    void *sub = zsocket_new (ctx, ZMQ_SUB);    zsocket_connect (sub, "%s:9002", argv[1]);    zmq_setsockopt (sub, ZMQ_SUBSCRIBE, "all", 4);    int64_t time[2];    zmq_pollitem_t pollitem[1] = { {sub, 0, ZMQ_POLLIN}    };    zmq_poll (pollitem, 1, -1);    zmsg_t *signal = zmsg_recv (sub);    zmsg_destroy (&signal);    char blob[SIZE] = { 0 };    zmsg_t *msg = zmsg_new ();    zframe_t *frame = zframe_new (blob, SIZE);    zmsg_add (msg, frame);    time[0] = zclock_time ();    int i;    for (i = 0; i < numb_msgs; i++) {        zmsg_t *nmsg = zmsg_dup (msg);        zmsg_send (&nmsg, dealer);    }    time[1] = zclock_time ();    zmsg_destroy (&msg);    zmq_poll (pollitem, 1, -1);    msg = zmsg_recv (sub);    zmsg_destroy (&msg);    msg = zmsg_new ();    frame = zframe_new (time, sizeof (int64_t) * 2);    zmsg_add (msg, frame);    zmsg_send (&msg, dealer);    zctx_destroy (&ctx);}

// Basic request-reply client using REQ socket//static void *client_task(void *args){	zctx_t *ctx = zctx_new();	void *client = zsocket_new(ctx, ZMQ_REQ);#if (defined (WIN32))	zsocket_connect(client, "tcp://localhost:5672"); // frontend#else	zsocket_connect(client, "ipc://frontend.ipc");#endif	// Send request, get reply	while (1) {		zstr_send(client, "HELLO");		char *reply = zstr_recv(client);		if (!reply) {			break;		}		printf("Client: %s/n", reply);		free(reply);		zclock_sleep(1);	}	zctx_destroy(&ctx);	return NULL;}

voidzproxy_test (bool verbose){    printf (" * zproxy: ");    //  @selftest    zctx_t *ctx = zctx_new ();    void *frontend = zsocket_new (ctx, ZMQ_PULL);    int rc = zsocket_bind (frontend, "inproc://frontend");    assert (rc == 0);    void *backend = zsocket_new (ctx, ZMQ_PUSH);    rc = zsocket_bind (backend, "inproc://backend");    assert (rc == 0);    zproxy_t *proxy = zproxy_new (ctx, frontend, backend);    //  Connect application sockets to proxy    void *faucet = zsocket_new (ctx, ZMQ_PUSH);    rc = zsocket_connect (faucet, "inproc://frontend");    assert (rc == 0);    void *sink = zsocket_new (ctx, ZMQ_PULL);    rc = zsocket_connect (sink, "inproc://backend");    assert (rc == 0);    //  Send some messages and check they arrived    zstr_send (faucet, "Hello");    char *string = zstr_recv (sink);    assert (streq (string, "Hello"));    zstr_free (&string);        //  Check pause/resume functionality    zproxy_pause (proxy);    zstr_send (faucet, "World");    zproxy_resume (proxy);    string = zstr_recv (sink);    assert (streq (string, "World"));    zstr_free (&string);        //  Create capture socket, must be a PULL socket    void *capture = zsocket_new (ctx, ZMQ_PULL);    rc = zsocket_bind (capture, "inproc://capture");    assert (rc == 0);    //  Switch on capturing, check that it works    zproxy_capture (proxy, "inproc://capture");    zstr_send (faucet, "Hello");        string = zstr_recv (sink);    assert (streq (string, "Hello"));    zstr_free (&string);        string = zstr_recv (capture);    assert (streq (string, "Hello"));    zstr_free (&string);    zproxy_destroy (&proxy);    zctx_destroy (&ctx);    //  @end    printf ("OK/n");}

static voidcollabclient_remakeSockets( cloneclient_t *cc ){    cc->snapshot = zsocket_new (cc->ctx, ZMQ_DEALER);    zsocket_connect (cc->snapshot,	collabclient_makeAddressString( cc->address,	cc->port + socket_offset_snapshot));        cc->subscriber = zsocket_new (cc->ctx, ZMQ_SUB);    zsocket_set_subscribe (cc->subscriber, "");    zsocket_connect (cc->subscriber,	collabclient_makeAddressString( cc->address,	cc->port + socket_offset_subscriber));    zsocket_set_subscribe (cc->subscriber, SUBTREE);    cc->publisher = zsocket_new (cc->ctx, ZMQ_PUSH);    zsocket_connect (cc->publisher,	collabclient_makeAddressString( cc->address,	cc->port + socket_offset_publisher));    int fd = 0;    size_t fdsz = sizeof(fd);    int rc = zmq_getsockopt( cc->subscriber, ZMQ_FD, &fd, &fdsz );    printf("subscriber rc:%d fd:%d/n", rc, fd );    GDrawAddReadFD( 0, fd, cc, zeromq_subscriber_fd_callback );  }

int game_thread( void * _parms ) {  GameThreadParms * parms = (GameThreadParms*)_parms;  GameState gs;  SharedRenderState rs;  game_init( gs, rs );  gs.zmq_control_socket = zsocket_new( parms->zmq_context, ZMQ_PAIR );  {    int ret = zsocket_connect( gs.zmq_control_socket, "inproc://control_game" );    assert( ret == 0 );  }    gs.zmq_render_socket = zsocket_new( parms->zmq_context, ZMQ_PAIR );  zsocket_bind( gs.zmq_render_socket, "inproc://game_render" );  gs.zmq_input_req = zsocket_new( parms->zmq_context, ZMQ_REQ );  {    int ret = zsocket_connect( gs.zmq_input_req, "inproc://input" );    assert( ret == 0 );  }  unsigned int baseline = SDL_GetTicks();  int framenum = 0;  while ( true ) {    unsigned int now = SDL_GetTicks();    unsigned int target_frame = ( now - baseline ) / GAME_DELAY;    if ( framenum <= target_frame ) {      framenum++;      // NOTE: build the state of the world at t = framenum * GAME_DELAY,      // under normal conditions that's a time in the future      // (the exception to that is if we are catching up on ticking game frames)      game_tick( now, gs, rs );      // notify the render thread that a new game state is ready.      // on the next render frame, it will start interpolating between the previous state and this new one      zstr_sendf( gs.zmq_render_socket, "%d %f %f %f %f %f %f %f %f %f", baseline + framenum * GAME_DELAY, rs.position.x, rs.position.y, rs.orientation.w, rs.orientation.x, rs.orientation.y, rs.orientation.z, rs.smoothed_angular.x, rs.smoothed_angular.y, rs.smoothed_angular.z );    } else {      int ahead = framenum * GAME_DELAY - ( now - baseline );      assert( ahead > 0 );      printf( "game sleep %d ms/n", ahead );      SDL_Delay( ahead );    }    char * cmd = zstr_recv_nowait( gs.zmq_control_socket );    if ( cmd != NULL ) {      assert( strcmp( cmd, "stop" ) == 0 );      free( cmd );      break;    }  }  return 0;}

int socket_connect(void *socket, const char *format, ...){    va_list args;    int err, n;    char buf[255], id[255];    //zsocket_set_router_mandatory(socket, 1);    va_start(args, format);    //** Set the ID    snprintf(buf, 255, format, args);//  snprintf(id, 255, "%s:%ld", buf, random());    snprintf(id, 255, "%ld", random_int(1, 1000));    zsocket_set_identity(socket, strdup(id));    err = zsocket_connect(socket, format, args);    n = errno;    va_end(args);    log_printf(0, "id=!%s! err=%d errno=%d/n", id, err, n);    assert(err == 0);    return(err);}

intmain(int argc, const char **argv){  zctx_t *ctx = zctx_new();  void *sub = zsocket_new(ctx, ZMQ_SUB);  zsocket_set_subscribe(sub, "");  zsocket_connect(sub, "tcp://127.0.0.1:3000");  printf("connected to :3000/n");  struct timeval start;  gettimeofday(&start, NULL);  while (1) {    char *msg = zstr_recv(sub);    if (0 == n--) {      struct timeval end;      gettimeofday(&end, NULL);      int duration = end.tv_sec - start.tv_sec;      printf("/n");      printf("  pub/sub:/n");      printf("    %d msgs/n", ops);      printf("    %d ops/s/n", ops / duration);      printf("    %d s/n", duration);      printf("/n");      exit(0);    }  }  return 0;}

static void* worker_routine(void* arg){  zmsg_t* msg;  zframe_t* frame;  zctx_t* ctx = zctx_new();  void* worker = zsocket_new(ctx, ZMQ_REQ);  zsocket_connect(worker, "ipc://%s-localbe.ipc", self);  frame = zframe_new(WORKER_READY, 1);  zframe_send(&frame, worker, 0);  while (1) {    msg = zmsg_recv(worker);    if (!msg)      break;    zframe_print(zmsg_last(msg), "Worker: ");    zframe_reset(zmsg_last(msg), "OK", 2);    zmsg_send(&msg, worker);  }  zctx_destroy(&ctx);  return NULL;}

void *zthread_fork (zctx_t *ctx, zthread_attached_fn *thread_fn, void *args){    shim_t *shim = NULL;    //  Create our end of the pipe    void *pipe = zctx__socket_pipe (ctx);    assert (pipe);    zsocket_bind (pipe, "inproc://zctx-pipe-%p", pipe);    //  Prepare argument shim for child thread    shim = (shim_t *) zmalloc (sizeof (shim_t));    assert (shim);    shim->attached = thread_fn;    shim->args = args;    shim->ctx = zctx_shadow (ctx);    assert (shim->ctx);    shim->pipe = zctx__socket_pipe (shim->ctx);    assert (shim->pipe);    //  Connect child pipe to our pipe    zsocket_connect (shim->pipe, "inproc://zctx-pipe-%p", pipe);    s_thread_start (shim);    return pipe;}

static agent_t *s_agent_new (zctx_t *ctx, void *control){    agent_t *self = (agent_t *) zmalloc (sizeof (agent_t));    self->ctx = ctx;    self->control = control;    self->router = zsocket_new (ctx, ZMQ_ROUTER);    //  Connect our data socket to caller's endpoint    self->data = zsocket_new (ctx, ZMQ_PAIR);    char *endpoint = zstr_recv (self->control);    int rc = zsocket_connect (self->data, "%s", endpoint);    assert (rc != -1);    free (endpoint);    //  Create new client codec using cert from API    byte public_key [32];    byte secret_key [32];    rc = zmq_recv (self->control, public_key, 32, 0);    assert (rc == 32);    rc = zmq_recv (self->control, secret_key, 32, 0);    assert (rc == 32);    self->cert = zcert_new_from (public_key, secret_key);            self->metadata = zhash_new ();    zhash_autofree (self->metadata);    self->clients = zhash_new ();    self->max_clients = 100;    self->max_pending = 10;    self->client_ttl = 3600;    //  60 minutes    self->pending_ttl = 60;     //  60 seconds    return self;}

static void *client_task (void *args){    zctx_t *ctx = zctx_new ();    void *client = zsocket_new (ctx, ZMQ_DEALER);    //  Set random identity to make tracing easier    char identity [10];    sprintf (identity, "%04X-%04X", randof (0x10000), randof (0x10000));    zsocket_set_identity (client, identity);    zsocket_connect (client, "tcp://localhost:5570");    zmq_pollitem_t items [] = { { client, 0, ZMQ_POLLIN, 0 } };    int request_nbr = 0;    while (true) {        //  Tick once per second, pulling in arriving messages        int centitick;        for (centitick = 0; centitick < 100; centitick++) {            zmq_poll (items, 1, 10 * ZMQ_POLL_MSEC);            if (items [0].revents & ZMQ_POLLIN) {                zmsg_t *msg = zmsg_recv (client);                zframe_print (zmsg_last (msg), identity);                zmsg_destroy (&msg);            }        }        zstr_send (client, "request #%d");    }    zctx_destroy (&ctx);    return NULL;}

static void test_zmq (flux_reactor_t *reactor){    zctx_t *zctx;    void *zs[2];    flux_watcher_t *r, *w;    ok ((zctx = zctx_new ()) != NULL,        "zmq: created zmq context");    zs[0] = zsocket_new (zctx, ZMQ_PAIR);    zs[1] = zsocket_new (zctx, ZMQ_PAIR);    ok (zs[0] && zs[1]        && zsocket_bind (zs[0], "inproc://test_zmq") == 0        && zsocket_connect (zs[1], "inproc://test_zmq") == 0,        "zmq: connected ZMQ_PAIR sockets over inproc");    r = flux_zmq_watcher_create (reactor, zs[0], FLUX_POLLIN, zmqreader, NULL);    w = flux_zmq_watcher_create (reactor, zs[1], FLUX_POLLOUT, zmqwriter, NULL);    ok (r != NULL && w != NULL,        "zmq: nonblocking reader and writer created");    flux_watcher_start (r);    flux_watcher_start (w);    ok (flux_reactor_run  (reactor, 0) == 0,        "zmq: reactor ran to completion after %d messages", zmqwriter_msgcount);    flux_watcher_stop (r);    flux_watcher_stop (w);    flux_watcher_destroy (r);    flux_watcher_destroy (w);    zsocket_destroy (zctx, zs[0]);    zsocket_destroy (zctx, zs[1]);    zctx_destroy (&zctx);}

int main (void){    zctx_t *ctx = zctx_new ();    zctx_set_linger (ctx, 1000);        void *pub = zsocket_new (ctx, ZMQ_XPUB);    zsocket_set_hwm (pub, 0);    zsocket_connect (pub, "tcp://127.0.0.1:9000");    //  Wait for subscriber to subscribe    zframe_t *frame = zframe_recv (pub);    zframe_destroy (&frame);        //  Send HELLOs for five seconds    size_t total = 0;    int64_t finish_at = zclock_time () + 5000;        while (zclock_time () < finish_at) {        //  Send 100K and then check time again        int count = 0;        for (count = 0; count < 100000; count++)            zstr_send (pub, "HELLO");        total++;    }    printf ("%zd00000 messages sent/n", total);        zstr_send (pub, "WORLD");    zctx_destroy (&ctx);    return 0;}

voidcollabclient_closeLocalServer( int port ){#ifdef BUILD_COLLAB    collabclient_sniffForLocalServer_t* cc = &collabclient_sniffForLocalServer_singleton;    zctx_t* ctx = obtainMainZMQContext();    int beacon_port = port;    if( !port )	port = collabclient_getDefaultBasePort();    printf("collabclient_closeLocalServer() port:%d/n", port);    void* socket = zsocket_new ( ctx, ZMQ_REQ );    zsocket_connect ( socket,        "tcp://localhost:%d", port+socket_offset_ping);    zstr_send( socket, "quit" );    cc->haveServer = 0;    if( beacon_port )    {	g_hash_table_remove_all( peers );    }    collabclient_sniffForLocalServer();    #endif}

int main (int argc, char *argv []){    //  Socket to talk to server	printf ("Collecting updates from weather server.../n");        zctx_t *context = zctx_new ();	void *subscriber = zsocket_new (context, ZMQ_PULL);	zsocket_set_hwm(subscriber, 100000); 		int rc = zsocket_connect (subscriber, RECEIVE_SOCKET);	assert (rc == 0);	void *worker = zsocket_new(context, ZMQ_PUSH);	rc = zsocket_bind(worker, WORKER_SOCKET);		assert(rc == 0);	int nthreads = 0;	for (nthreads=0; nthreads < 50; nthreads++)	{		zthread_fork(context, parser_thread, NULL);	}	//  Subscribe to zipcode, default is NYC, 10001	while(1)	{		int size;		char *string = safe_recv_from_server (subscriber, &size);		parse_notifications(string, size,  worker);		free (string);	}printf("Ending /n");	zctx_destroy (&context);	return 0;}

void send_czmq (char *buf, int len){    zctx_t *zctx;    void *zs;    zmsg_t *zmsg;    if (!(zctx = zctx_new ()))        log_err_exit ("C: zctx_new");    if (lopt) /* zctx linger default = 0 (flush none) */        zctx_set_linger (zctx, linger);     if (!(zs = zsocket_new (zctx, ZMQ_DEALER)))        log_err_exit ("C: zsocket_new");    //if (lopt) // doesn't work here     //    zsocket_set_linger (zs, linger);     if (iopt)        zsocket_set_immediate (zs, imm);    //zsocket_set_sndhwm (zs, 0); /* unlimited */    if (zsocket_connect (zs, "%s", uri) < 0)        log_err_exit ("C: zsocket_connect");    if (!(zmsg = zmsg_new ()))        oom ();    if (zmsg_pushmem (zmsg, buf, bufsize) < 0)        oom ();    if (zmsg_send (&zmsg, zs) < 0)        log_err_exit ("C: zmsg_send");    if (sleep_usec > 0)        usleep (sleep_usec);    zctx_destroy (&zctx);}

static agent_t *s_agent_new (zctx_t *ctx, void *control){    agent_t *self = (agent_t *) zmalloc (sizeof (agent_t));    self->ctx = ctx;    self->control = control;    self->state = waiting;    self->dealer = zsocket_new (ctx, ZMQ_DEALER);    //  Connect our data socket to caller's endpoint    self->data = zsocket_new (ctx, ZMQ_PAIR);    char *endpoint = zstr_recv (self->control);    int rc = zsocket_connect (self->data, "%s", endpoint);    assert (rc != -1);    free (endpoint);    //  Create new client codec using cert from API    byte public_key [32];    byte secret_key [32];    rc = zmq_recv (self->control, public_key, 32, 0);    assert (rc == 32);    rc = zmq_recv (self->control, secret_key, 32, 0);    assert (rc == 32);        zcert_t *cert = zcert_new_from (public_key, secret_key);    self->codec = curve_codec_new_client (cert);    zcert_destroy (&cert);    return self;}

void *zthread_fork (zctx_t *ctx, zthread_attached_fn *thread_fn, void *args){    shim_t *shim = NULL;    //  Create our end of the pipe    void *pipe = zsocket_new (ctx, ZMQ_PAIR);    if (pipe) {        zsocket_set_hwm (pipe, zctx_hwm (ctx));        zsocket_bind (pipe, "inproc://zctx-pipe-%p", pipe);    }    else        return NULL;        //  Prepare argument shim for child thread    shim = (shim_t *) zmalloc (sizeof (shim_t));    if (shim) {        shim->attached = thread_fn;        shim->args = args;        shim->ctx = zctx_shadow (ctx);        if (!shim->ctx)            return NULL;    }    else        return NULL;        //  Connect child pipe to our pipe    shim->pipe = zsocket_new (shim->ctx, ZMQ_PAIR);    if (!shim->pipe)        return NULL;    zsocket_set_hwm (shim->pipe, 1);    zsocket_connect (shim->pipe, "inproc://zctx-pipe-%p", pipe);        s_thread_start (shim);    return pipe;}

int main (int argc, char *argv []){    zctx_t *context = zctx_new ();    void *publisher = zsocket_new (context, ZMQ_PUB);    if (argc == 2)        zsocket_connect (publisher, argv [1]);    else        zsocket_bind (publisher, "tcp://*:5556");    //  Ensure subscriber connection has time to complete    sleep (1);    //  Send out all 1,000 topic messages    int topic_nbr;    for (topic_nbr = 0; topic_nbr < 1000; topic_nbr++) {        zstr_sendm (publisher, "%03d", topic_nbr, ZMQ_SNDMORE);        zstr_send (publisher, "Save Roger");    }    //  Send one random update per second    srandom ((unsigned) time (NULL));    while (!zctx_interrupted) {        sleep (1);        zstr_sendm (publisher, "%03d", randof (1000), ZMQ_SNDMORE);        zstr_send (publisher, "Off with his head!");    }    zctx_destroy (&context);    return 0;}

bstar_t *bstar_new (int primary, char *local, char *remote){    bstar_t        *self;    self = (bstar_t *) zmalloc (sizeof (bstar_t));    //  Initialize the Binary Star    self->ctx = zctx_new ();    self->loop = zloop_new ();    self->state = primary? STATE_PRIMARY: STATE_BACKUP;    //  Create publisher for state going to peer    self->statepub = zsocket_new (self->ctx, ZMQ_PUB);    zsocket_bind (self->statepub, local);    //  Create subscriber for state coming from peer    self->statesub = zsocket_new (self->ctx, ZMQ_SUB);    zsocket_set_subscribe (self->statesub, "");    zsocket_connect (self->statesub, remote);    //  Set-up basic reactor events    zloop_timer (self->loop, BSTAR_HEARTBEAT, 0, s_send_state, self);    zmq_pollitem_t poller = { self->statesub, 0, ZMQ_POLLIN };    zloop_poller (self->loop, &poller, s_recv_state, self);    return self;}

static voidserver_worker (void *args, zctx_t *ctx, void *pipe){    void *worker = zsocket_new (ctx, ZMQ_DEALER);    zsocket_connect (worker, "inproc://backend");    while (true) {        //  The DEALER socket gives us the reply envelope and message        zmsg_t *msg = zmsg_recv (worker);        zframe_t *identity = zmsg_pop (msg);        zframe_t *content = zmsg_pop (msg);        assert (content);        zmsg_destroy (&msg);        //  Send 0..4 replies back        int reply, replies = randof (5);        for (reply = 0; reply < replies; reply++) {            //  Sleep for some fraction of a second            zclock_sleep (randof (1000) + 1);            zframe_send (&identity, worker, ZFRAME_REUSE + ZFRAME_MORE);            zframe_send (&content, worker, ZFRAME_REUSE);        }        zframe_destroy (&identity);        zframe_destroy (&content);    }}

//  Checks whether client can connect to serverstatic bools_can_connect (zctx_t *ctx, void **server, void **client){    int port_nbr = zsocket_bind (*server, "tcp://127.0.0.1:*");    assert (port_nbr > 0);    int rc = zsocket_connect (*client, "tcp://127.0.0.1:%d", port_nbr);    assert (rc == 0);    //  Give the connection time to fail if that's the plan    zclock_sleep (200);    //  By default PUSH sockets block if there's no peer    zsock_set_sndtimeo (*server, 200);    zstr_send (*server, "Hello, World");    zpoller_t *poller = zpoller_new (*client, NULL);    bool success = (zpoller_wait (poller, 400) == *client);    zpoller_destroy (&poller);    zsocket_destroy (ctx, *client);    zsocket_destroy (ctx, *server);    *server = zsocket_new (ctx, ZMQ_PUSH);    assert (*server);    *client = zsocket_new (ctx, ZMQ_PULL);    assert (*client);    return success;}

void *zthread_fork (zctx_t *ctx, zthread_attached_fn *thread_fn, void *args){    //  Create our end of the pipe    //  Pipe has HWM of 1 at both sides to block runaway writers    void *pipe = zsocket_new (ctx, ZMQ_PAIR);    assert (pipe);    zsockopt_set_hwm (pipe, 1);    zsocket_bind (pipe, "inproc://zctx-pipe-%p", pipe);    //  Prepare argument shim for child thread    shim_t *shim = (shim_t *) zmalloc (sizeof (shim_t));    shim->attached = thread_fn;    shim->args = args;    shim->ctx = zctx_shadow (ctx);    //  Connect child pipe to our pipe    shim->pipe = zsocket_new (shim->ctx, ZMQ_PAIR);    assert (shim->pipe);    zsockopt_set_hwm (shim->pipe, 1);    zsocket_connect (shim->pipe, "inproc://zctx-pipe-%p", pipe);    s_thread_start (shim);    return pipe;}

static voidclient_task (void *args, zctx_t *ctx, void *pipe){    void *client = zsocket_new (ctx, ZMQ_DEALER);    zsocket_connect (client, "tcp://localhost:5555");    printf ("Setting up test.../n");    zclock_sleep (100);    int requests;    int64_t start;    printf ("Synchronous round-trip test.../n");    start = zclock_time ();    for (requests = 0; requests < 10000; requests++) {        zstr_send (client, "hello");        char *reply = zstr_recv (client);        free (reply);    }    printf (" %d calls/second/n",        (1000 * 10000) / (int) (zclock_time () - start));    printf ("Asynchronous round-trip test.../n");    start = zclock_time ();    for (requests = 0; requests < 100000; requests++)        zstr_send (client, "hello");    for (requests = 0; requests < 100000; requests++) {        char *reply = zstr_recv (client);        free (reply);    }    printf (" %d calls/second/n",        (1000 * 100000) / (int) (zclock_time () - start));    zstr_send (pipe, "done");}

static void* client_routine(void* arg){  zctx_t* ctx = zctx_new();  void* client = zsocket_new(ctx, ZMQ_REQ);  zsocket_connect(client, "ipc://frontend.ipc");  while (1) {    char* reply;    zstr_send(client, "Hello");    reply = zstr_recv(client);    if (NULL == reply)      break;    fprintf(stdout, "client: %s/n", reply);    free(reply);    sleep(1);  }  zctx_destroy(&ctx);  return NULL;}

static bools_can_connect (void *server, void *client){    //  We'll do each test on a new port number since otherwise we have to    //  destroy and recreate the sockets each time.    static int port_nbr = 9000;    int rc = zsocket_bind (server, "tcp://*:%d", port_nbr);    assert (rc == port_nbr);    rc = zsocket_connect (client, "tcp://localhost:%d", port_nbr);    assert (rc == 0);        zpoller_t *poller = zpoller_new (client, NULL);    zstr_send (server, "Hello, World");    //  Need up to half a second if running under Valgrind    bool success = zpoller_wait (poller, 500) == client;    if (success)        free (zstr_recv (client));    zpoller_destroy (&poller);    rc = zsocket_unbind (server, "tcp://*:%d", port_nbr);    assert (rc != -1);    rc = zsocket_disconnect (client, "tcp://localhost:%d", port_nbr);    assert (rc != -1);    port_nbr++;    return success;}

voidzre_peer_connect (zre_peer_t *self, char *reply_to, char *endpoint){    assert (self);    assert (!self->connected);    //  Create new outgoing socket (drop any messages in transit)    self->mailbox = zsocket_new (self->ctx, ZMQ_DEALER);        //  Set our caller 'From' identity so that receiving node knows    //  who each message came from.    zsocket_set_identity (self->mailbox, reply_to);    //  Set a high-water mark that allows for reasonable activity    zsocket_set_sndhwm (self->mailbox, PEER_EXPIRED * 100);        //  Send messages immediately or return EAGAIN    zsocket_set_sndtimeo (self->mailbox, 0);        //  Connect through to peer node    zsocket_connect (self->mailbox, "tcp://%s", endpoint);    self->endpoint = strdup (endpoint);    self->connected = true;    self->ready = false;}

    explicit Streamer(int i)        : socket_(nullptr)        , backendSocket_(nullptr)        , id_("Streamer" + std::to_string(i))    {        socket_ = zsocket_new(ctx_, ZMQ_DEALER);        assert(socket_);        //zsock_set_identity((zsock_t*)socket_, id_.c_str());        int rc = zsocket_connect(socket_, "tcp://127.0.0.1:5562");        assert(rc);        backendSocket_ = zsocket_new(ctx_, ZMQ_DEALER);        assert(backendSocket_);        //zsock_set_identity((zsock_t*)backendSocket_, id_.c_str());        rc = zsocket_connect(backendSocket_, "tcp://127.0.0.1:5563");        assert(rc);    }

intzsocket_test (Bool verbose){    printf (" * zsocket: ");    //  @selftest    zctx_t *ctx = zctx_new ();    assert (ctx);    //  Create a detached thread, let it run    char *interf = "*";    char *domain = "localhost";    int service = 5560;    void *writer = zsocket_new (ctx, ZMQ_PUSH);    assert (writer);    void *reader = zsocket_new (ctx, ZMQ_PULL);    assert (reader);    assert (streq (zsocket_type_str (writer), "PUSH"));    assert (streq (zsocket_type_str (reader), "PULL"));    int rc = zsocket_bind (writer, "tcp://%s:%d", interf, service);    assert (rc == service);    rc = zsocket_connect (reader, "tcp://%s:%d", domain, service);    assert (rc == 0);    zstr_send (writer, "HELLO");    char *message = zstr_recv (reader);    assert (message);    assert (streq (message, "HELLO"));    free (message);    int port = zsocket_bind (writer, "tcp://%s:*", interf);    assert (port >= ZSOCKET_DYNFROM && port <= ZSOCKET_DYNTO);    assert (zsocket_poll (writer, 100) == FALSE);    rc = zsocket_connect (reader, "txp://%s:%d", domain, service);    assert (rc == -1);    zsocket_destroy (ctx, writer);    zctx_destroy (&ctx);    //  @end    printf ("OK/n");    return 0;}