C++ (Cpp) PERL_FD_ISSET Examples

Example #1

/* select contributed by Vincent R. Slyngstad ([email protected]) */
int
win32_select(int nfds, Perl_fd_set* rd, Perl_fd_set* wr, Perl_fd_set* ex, const struct timeval* timeout)
{
    int r;
#ifdef USE_SOCKETS_AS_HANDLES
    int i, fd, save_errno = errno;
    FD_SET nrd, nwr, nex;

    /* winsock seems incapable of dealing with all three null fd_sets,
     * so do the (millisecond) sleep as a special case
     */
    if (!(rd || wr || ex)) {
	if (timeout)
	    Sleep(timeout->tv_sec  * 1000 +
		  timeout->tv_usec / 1000);	/* do the best we can */
	else
	    Sleep(UINT_MAX);
	return 0;
    }
    StartSockets();

    FD_ZERO(&nrd);
    FD_ZERO(&nwr);
    FD_ZERO(&nex);
    for (i = 0; i < nfds; i++) {
	fd = TO_SOCKET(i);
	if (rd && PERL_FD_ISSET(i,rd))
	    FD_SET((unsigned)fd, &nrd);
	if (wr && PERL_FD_ISSET(i,wr))
	    FD_SET((unsigned)fd, &nwr);
	if (ex && PERL_FD_ISSET(i,ex))
	    FD_SET((unsigned)fd, &nex);
    }

    errno = save_errno;
    SOCKET_TEST_ERROR(r = select(nfds, &nrd, &nwr, &nex, timeout));
    save_errno = errno;

    for (i = 0; i < nfds; i++) {
	fd = TO_SOCKET(i);
	if (rd && PERL_FD_ISSET(i,rd) && !FD_ISSET(fd, &nrd))
	    PERL_FD_CLR(i,rd);
	if (wr && PERL_FD_ISSET(i,wr) && !FD_ISSET(fd, &nwr))
	    PERL_FD_CLR(i,wr);
	if (ex && PERL_FD_ISSET(i,ex) && !FD_ISSET(fd, &nex))
	    PERL_FD_CLR(i,ex);
    }
    errno = save_errno;
#else
    SOCKET_TEST_ERROR(r = select(nfds, rd, wr, ex, timeout));
#endif
    return r;
}

Example #2

File: win32sck.c Project: BackupTheBerlios/wl530g-svn

/* select contributed by Vincent R. Slyngstad ([email protected]) */
int
win32_select(int nfds, Perl_fd_set* rd, Perl_fd_set* wr, Perl_fd_set* ex, const struct timeval* timeout)
{
    int r;
#ifdef USE_SOCKETS_AS_HANDLES
    Perl_fd_set dummy;
    int i, fd, bit, offset;
    FD_SET nrd, nwr, nex, *prd, *pwr, *pex;

    /* winsock seems incapable of dealing with all three null fd_sets,
     * so do the (millisecond) sleep as a special case
     */
    if (!(rd || wr || ex)) {
	if (timeout)
	    Sleep(timeout->tv_sec  * 1000 +
		  timeout->tv_usec / 1000);	/* do the best we can */
	else
	    Sleep(UINT_MAX);
	return 0;
    }
    StartSockets();
    PERL_FD_ZERO(&dummy);
    if (!rd)
	rd = &dummy, prd = NULL;
    else
	prd = &nrd;
    if (!wr)
	wr = &dummy, pwr = NULL;
    else
	pwr = &nwr;
    if (!ex)
	ex = &dummy, pex = NULL;
    else
	pex = &nex;

    FD_ZERO(&nrd);
    FD_ZERO(&nwr);
    FD_ZERO(&nex);
    for (i = 0; i < nfds; i++) {
	fd = TO_SOCKET(i);
	if (PERL_FD_ISSET(i,rd))
	    FD_SET(fd, &nrd);
	if (PERL_FD_ISSET(i,wr))
	    FD_SET(fd, &nwr);
	if (PERL_FD_ISSET(i,ex))
	    FD_SET(fd, &nex);
    }

    SOCKET_TEST_ERROR(r = select(nfds, prd, pwr, pex, timeout));

    for (i = 0; i < nfds; i++) {
	fd = TO_SOCKET(i);
	if (PERL_FD_ISSET(i,rd) && !FD_ISSET(fd, &nrd))
	    PERL_FD_CLR(i,rd);
	if (PERL_FD_ISSET(i,wr) && !FD_ISSET(fd, &nwr))
	    PERL_FD_CLR(i,wr);
	if (PERL_FD_ISSET(i,ex) && !FD_ISSET(fd, &nex))
	    PERL_FD_CLR(i,ex);
    }
#else
    SOCKET_TEST_ERROR(r = select(nfds, rd, wr, ex, timeout));
#endif
    return r;
}

Example #3

File: win32sck.c Project: evalEmpire/piledriver

/* select contributed by Vincent R. Slyngstad ([email protected]) */
int
win32_select(int nfds, Perl_fd_set* rd, Perl_fd_set* wr, Perl_fd_set* ex, const struct timeval* timeout)
{
    int r;
    int i, fd, save_errno = errno;
    FD_SET nrd, nwr, nex;
    bool just_sleep = TRUE;

    StartSockets();

    FD_ZERO(&nrd);
    FD_ZERO(&nwr);
    FD_ZERO(&nex);
    for (i = 0; i < nfds; i++) {
        if (rd && PERL_FD_ISSET(i,rd)) {
            fd = TO_SOCKET(i);
            FD_SET((unsigned)fd, &nrd);
            just_sleep = FALSE;
        }
        if (wr && PERL_FD_ISSET(i,wr)) {
            fd = TO_SOCKET(i);
            FD_SET((unsigned)fd, &nwr);
            just_sleep = FALSE;
        }
        if (ex && PERL_FD_ISSET(i,ex)) {
            fd = TO_SOCKET(i);
            FD_SET((unsigned)fd, &nex);
            just_sleep = FALSE;
        }
    }

    /* winsock seems incapable of dealing with all three fd_sets being empty,
     * so do the (millisecond) sleep as a special case
     */
    if (just_sleep) {
        if (timeout)
            Sleep(timeout->tv_sec  * 1000 +
                  timeout->tv_usec / 1000);	/* do the best we can */
        else
            Sleep(UINT_MAX);
        return 0;
    }

    errno = save_errno;
    SOCKET_TEST_ERROR(r = select(nfds, &nrd, &nwr, &nex, (PTIMEVAL)timeout));
    save_errno = errno;

    for (i = 0; i < nfds; i++) {
        if (rd && PERL_FD_ISSET(i,rd)) {
            fd = TO_SOCKET(i);
            if (!FD_ISSET(fd, &nrd))
                PERL_FD_CLR(i,rd);
        }
        if (wr && PERL_FD_ISSET(i,wr)) {
            fd = TO_SOCKET(i);
            if (!FD_ISSET(fd, &nwr))
                PERL_FD_CLR(i,wr);
        }
        if (ex && PERL_FD_ISSET(i,ex)) {
            fd = TO_SOCKET(i);
            if (!FD_ISSET(fd, &nex))
                PERL_FD_CLR(i,ex);
        }
    }
    errno = save_errno;
    return r;
}