nblayer.c

Netscape NSPR库源码

                break;
            case xmt_send_debit:
            case xmt_data:
                my_flags = in_flags;
            default: break;
        }
    }
    else PR_ASSERT(!"How'd I get here?");
    new_flags = (fd->lower->methods->poll)(fd->lower, my_flags, out_flags);
    if (verbosity > chatty)
        PR_fprintf(
            logFile, "Poll [i: 0x%x, m: 0x%x, o: 0x%x, n: 0x%x]\n",
            in_flags, my_flags, *out_flags, new_flags);
    return new_flags;
}  /* MyPoll */

static PRFileDesc * PR_CALLBACK MyAccept(
    PRFileDesc *fd, PRNetAddr *addr, PRIntervalTime timeout)
{
    PRStatus rv;
    PRFileDesc *newfd, *layer = fd;
    PRFileDesc *newstack;
    PRFilePrivate *newsecret;

    PR_ASSERT(fd != NULL);
    PR_ASSERT(fd->lower != NULL);

    newstack = PR_NEW(PRFileDesc);
    if (NULL == newstack)
    {
        PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
        return NULL;
    }
    newsecret = PR_NEW(PRFilePrivate);
    if (NULL == newsecret)
    {
        PR_DELETE(newstack);
        PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
        return NULL;
    }
    *newstack = *fd;  /* make a copy of the accepting layer */
    *newsecret = *fd->secret;
    newstack->secret = newsecret;

    newfd = (fd->lower->methods->accept)(fd->lower, addr, timeout);
    if (NULL == newfd)
    {
        PR_DELETE(newsecret);
        PR_DELETE(newstack);
        return NULL;
    }

    /* this PR_PushIOLayer call cannot fail */
    rv = PR_PushIOLayer(newfd, PR_TOP_IO_LAYER, newstack);
    PR_ASSERT(PR_SUCCESS == rv);
    return newfd;  /* that's it */
}

static PRInt32 PR_CALLBACK MyRecv(
    PRFileDesc *fd, void *buf, PRInt32 amount,
    PRIntn flags, PRIntervalTime timeout)
{
    char *b;
    PRInt32 rv;
    PRFileDesc *lo = fd->lower;
    PRFilePrivate *mine = (PRFilePrivate*)fd->secret;

    do
    {
        switch (mine->rcvstate)
        {
        case rcv_get_debit:
            b = (char*)&mine->rcvreq;
            mine->rcvreq = amount;
            rv = lo->methods->recv(
                lo, b + mine->rcvinprogress,
                sizeof(mine->rcvreq) - mine->rcvinprogress, flags, timeout);
            if (0 == rv) goto closed;
            if ((-1 == rv) && (PR_WOULD_BLOCK_ERROR == PR_GetError())) break;
            mine->rcvinprogress += rv;  /* accumulate the read */
            if (mine->rcvinprogress < sizeof(mine->rcvreq)) break;  /* loop */
            mine->rcvstate = rcv_send_credit;
            mine->rcvinprogress = 0;
        case rcv_send_credit:
            b = (char*)&mine->rcvreq;
            rv = lo->methods->send(
                lo, b + mine->rcvinprogress,
                sizeof(mine->rcvreq) - mine->rcvinprogress, flags, timeout);
            if ((-1 == rv) && (PR_WOULD_BLOCK_ERROR == PR_GetError())) break;
            mine->rcvinprogress += rv;  /* accumulate the read */
            if (mine->rcvinprogress < sizeof(mine->rcvreq)) break;  /* loop */
            mine->rcvstate = rcv_data;
            mine->rcvinprogress = 0;
        case rcv_data:
            b = (char*)buf;
            rv = lo->methods->recv(
                lo, b + mine->rcvinprogress,
                mine->rcvreq - mine->rcvinprogress, flags, timeout);
            if (0 == rv) goto closed;
            if ((-1 == rv) && (PR_WOULD_BLOCK_ERROR == PR_GetError())) break;
            mine->rcvinprogress += rv;  /* accumulate the read */
            if (mine->rcvinprogress < amount) break;  /* loop */
            mine->rcvstate = rcv_get_debit;
            mine->rcvinprogress = 0;
            return mine->rcvreq;  /* << -- that's it! */
        default:
            break;
        }
    } while (-1 != rv);
    return rv;
closed:
    mine->rcvinprogress = 0;
    mine->rcvstate = rcv_get_debit;
    return 0;
}  /* MyRecv */

static PRInt32 PR_CALLBACK MySend(
    PRFileDesc *fd, const void *buf, PRInt32 amount,
    PRIntn flags, PRIntervalTime timeout)
{
    char *b;
    PRInt32 rv;
    PRFileDesc *lo = fd->lower;
    PRFilePrivate *mine = (PRFilePrivate*)fd->secret;

    do
    {
        switch (mine->xmtstate)
        {
        case xmt_send_debit:
            b = (char*)&mine->xmtreq;
            mine->xmtreq = amount;
            rv = lo->methods->send(
                lo, b - mine->xmtinprogress,
                sizeof(mine->xmtreq) - mine->xmtinprogress, flags, timeout);
            if ((-1 == rv) && (PR_WOULD_BLOCK_ERROR == PR_GetError())) break;
            mine->xmtinprogress += rv;
            if (mine->xmtinprogress < sizeof(mine->xmtreq)) break;
            mine->xmtstate = xmt_recv_credit;
            mine->xmtinprogress = 0;
        case xmt_recv_credit:
             b = (char*)&mine->xmtreq;
             rv = lo->methods->recv(
                lo, b + mine->xmtinprogress,
                sizeof(mine->xmtreq) - mine->xmtinprogress, flags, timeout);
            if ((-1 == rv) && (PR_WOULD_BLOCK_ERROR == PR_GetError())) break;
            mine->xmtinprogress += rv;
            if (mine->xmtinprogress < sizeof(mine->xmtreq)) break;
            mine->xmtstate = xmt_data;
            mine->xmtinprogress = 0;
        case xmt_data:
            b = (char*)buf;
            rv = lo->methods->send(
                lo, b + mine->xmtinprogress,
                mine->xmtreq - mine->xmtinprogress, flags, timeout);
            if ((-1 == rv) && (PR_WOULD_BLOCK_ERROR == PR_GetError())) break;
            mine->xmtinprogress += rv;
            if (mine->xmtinprogress < amount) break;
            mine->xmtstate = xmt_send_debit;
            mine->xmtinprogress = 0;
            return mine->xmtreq;  /* <<-- That's the one! */
        default:
            break;
        }
    } while (-1 != rv);
    return rv;
}  /* MySend */

static Verbosity ChangeVerbosity(Verbosity verbosity, PRIntn delta)
{
    PRIntn verbage = (PRIntn)verbosity + delta;
    if (verbage < (PRIntn)silent) verbage = (PRIntn)silent;
    else if (verbage > (PRIntn)noisy) verbage = (PRIntn)noisy;
    return (Verbosity)verbage;
}  /* ChangeVerbosity */

PRIntn main(PRIntn argc, char **argv)
{
    PRStatus rv;
    PLOptStatus os;
    PRFileDesc *client, *service;
    PRNetAddr any_address;
    const char *server_name = NULL;
    const PRIOMethods *stubMethods;
    PRThread *client_thread, *server_thread;
    PRThreadScope thread_scope = PR_LOCAL_THREAD;
    PRSocketOptionData socket_noblock, socket_nodelay;
    PLOptState *opt = PL_CreateOptState(argc, argv, "dqGC:c:p:");
    while (PL_OPT_EOL != (os = PL_GetNextOpt(opt)))
    {
        if (PL_OPT_BAD == os) continue;
        switch (opt->option)
        {
        case 0:
            server_name = opt->value;
            break;
        case 'd':  /* debug mode */
            if (verbosity < noisy)
                verbosity = ChangeVerbosity(verbosity, 1);
            break;
        case 'q':  /* debug mode */
            if (verbosity > silent)
                verbosity = ChangeVerbosity(verbosity, -1);
            break;
        case 'G':  /* use global threads */
            thread_scope = PR_GLOBAL_THREAD;
            break;
        case 'C':  /* number of threads waiting */
            major_iterations = atoi(opt->value);
            break;
        case 'c':  /* number of client threads */
            minor_iterations = atoi(opt->value);
            break;
        case 'p':  /* default port */
            default_port = atoi(opt->value);
            break;
        default:
            break;
        }
    }
    PL_DestroyOptState(opt);
    PR_STDIO_INIT();

    logFile = PR_GetSpecialFD(PR_StandardError);
    identity = PR_GetUniqueIdentity("Dummy");
    stubMethods = PR_GetDefaultIOMethods();

    /*
    ** The protocol we're going to implement is one where in order to initiate
    ** a send, the sender must first solicit permission. Therefore, every
    ** send is really a send - receive - send sequence.
    */
    myMethods = *stubMethods;  /* first get the entire batch */
    myMethods.accept = MyAccept;  /* then override the ones we care about */
    myMethods.recv = MyRecv;  /* then override the ones we care about */
    myMethods.send = MySend;  /* then override the ones we care about */
    myMethods.close = MyClose;  /* then override the ones we care about */
    myMethods.poll = MyPoll;  /* then override the ones we care about */

    if (NULL == server_name)
        rv = PR_InitializeNetAddr(
            PR_IpAddrLoopback, default_port, &server_address);
    else
    {
        rv = PR_StringToNetAddr(server_name, &server_address);
        PR_ASSERT(PR_SUCCESS == rv);
        rv = PR_InitializeNetAddr(
            PR_IpAddrNull, default_port, &server_address);
    }
    PR_ASSERT(PR_SUCCESS == rv);

    socket_noblock.value.non_blocking = PR_TRUE;
    socket_noblock.option = PR_SockOpt_Nonblocking;
    socket_nodelay.value.no_delay = PR_TRUE;
    socket_nodelay.option = PR_SockOpt_NoDelay;

    /* one type w/o layering */

    while (major_iterations-- > 0)
    {
        if (verbosity > silent)
            PR_fprintf(logFile, "Beginning non-layered test\n");

        client = PR_NewTCPSocket(); PR_ASSERT(NULL != client);
        service = PR_NewTCPSocket(); PR_ASSERT(NULL != service);

        rv = PR_SetSocketOption(client, &socket_noblock);
        PR_ASSERT(PR_SUCCESS == rv);
        rv = PR_SetSocketOption(service, &socket_noblock);
        PR_ASSERT(PR_SUCCESS == rv);
        rv = PR_SetSocketOption(client, &socket_nodelay);
        PR_ASSERT(PR_SUCCESS == rv);
        rv = PR_SetSocketOption(service, &socket_nodelay);
        PR_ASSERT(PR_SUCCESS == rv);

        rv = PR_InitializeNetAddr(PR_IpAddrAny, default_port, &any_address);
        PR_ASSERT(PR_SUCCESS == rv);
        rv = PR_Bind(service, &any_address); PR_ASSERT(PR_SUCCESS == rv);
        rv = PR_Listen(service, 10); PR_ASSERT(PR_SUCCESS == rv);

        server_thread = PR_CreateThread(
            PR_USER_THREAD, Server, service,
            PR_PRIORITY_HIGH, thread_scope,
            PR_JOINABLE_THREAD, 16 * 1024);
        PR_ASSERT(NULL != server_thread);

        client_thread = PR_CreateThread(
            PR_USER_THREAD, Client, client,
            PR_PRIORITY_NORMAL, thread_scope,
            PR_JOINABLE_THREAD, 16 * 1024);
        PR_ASSERT(NULL != client_thread);

        rv = PR_JoinThread(client_thread);
        PR_ASSERT(PR_SUCCESS == rv);
        rv = PR_JoinThread(server_thread);
        PR_ASSERT(PR_SUCCESS == rv);

        rv = PR_Close(client); PR_ASSERT(PR_SUCCESS == rv);
        rv = PR_Close(service); PR_ASSERT(PR_SUCCESS == rv);
        if (verbosity > silent)
            PR_fprintf(logFile, "Ending non-layered test\n");

        /* with layering */
        if (verbosity > silent)
            PR_fprintf(logFile, "Beginning layered test\n");
        client = PR_NewTCPSocket(); PR_ASSERT(NULL != client);
        service = PR_NewTCPSocket(); PR_ASSERT(NULL != service);

        rv = PR_SetSocketOption(client, &socket_noblock);
        PR_ASSERT(PR_SUCCESS == rv);
        rv = PR_SetSocketOption(service, &socket_noblock);
        PR_ASSERT(PR_SUCCESS == rv);
        rv = PR_SetSocketOption(client, &socket_nodelay);
        PR_ASSERT(PR_SUCCESS == rv);
        rv = PR_SetSocketOption(service, &socket_nodelay);
        PR_ASSERT(PR_SUCCESS == rv);

        PushLayer(client);
        PushLayer(service);

        rv = PR_InitializeNetAddr(PR_IpAddrAny, default_port, &any_address);
        PR_ASSERT(PR_SUCCESS == rv);
        rv = PR_Bind(service, &any_address); PR_ASSERT(PR_SUCCESS == rv);
        rv = PR_Listen(service, 10); PR_ASSERT(PR_SUCCESS == rv);

        server_thread = PR_CreateThread(
            PR_USER_THREAD, Server, service,
            PR_PRIORITY_HIGH, thread_scope,
            PR_JOINABLE_THREAD, 16 * 1024);
        PR_ASSERT(NULL != server_thread);

        client_thread = PR_CreateThread(
            PR_USER_THREAD, Client, client,
            PR_PRIORITY_NORMAL, thread_scope,
            PR_JOINABLE_THREAD, 16 * 1024);
        PR_ASSERT(NULL != client_thread);

        rv = PR_JoinThread(client_thread);
        PR_ASSERT(PR_SUCCESS == rv);
        rv = PR_JoinThread(server_thread);
        PR_ASSERT(PR_SUCCESS == rv);

        rv = PR_Close(PopLayer(client)); PR_ASSERT(PR_SUCCESS == rv);
        rv = PR_Close(PopLayer(service)); PR_ASSERT(PR_SUCCESS == rv);
        if (verbosity > silent)
            PR_fprintf(logFile, "Ending layered test\n");
    }
    return 0;
}  /* main */

/* nblayer.c */