poll.c

Apache V2.0.15 Alpha For Linuxhttpd-2_0_15-alpha.tar.Z

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#include "apr_private.h"
#if BEOS_BONE /* BONE uses the unix code - woohoo */
#include "../unix/poll.c"
#else
#include "networkio.h"

/*  BeOS R4 doesn't have a poll function, but R5 will have 
 *  so for the time being we try our best with an implementaion that 
 *  uses select.  However, select on beos isn't that hot either, so 
 *  until R5 we have to live with a less than perfect implementation 
 *
 *  Apparently those sneaky people at Be included support for write in
 *  select for R4.5 of BeOS.  So here we use code that uses the write
 *  bits.
 */
apr_status_t apr_poll_setup(apr_pollfd_t **new, apr_int32_t num, apr_pool_t *cont)
{
    (*new) = (apr_pollfd_t *)apr_pcalloc(cont, sizeof(apr_pollfd_t) * num);
    if ((*new) == NULL) {
        return APR_ENOMEM;
    }
    (*new)->cntxt = cont;
    (*new)->read = (fd_set *)apr_pcalloc(cont, sizeof(fd_set));
    (*new)->write = (fd_set *)apr_pcalloc(cont, sizeof(fd_set));
    (*new)->except = (fd_set *)apr_pcalloc(cont, sizeof(fd_set));
    (*new)->read_set = (fd_set *)apr_pcalloc(cont, sizeof(fd_set));
    (*new)->write_set = (fd_set *)apr_pcalloc(cont, sizeof(fd_set));
    (*new)->except_set = (fd_set *)apr_pcalloc(cont, sizeof(fd_set));
    FD_ZERO((*new)->read);
    FD_ZERO((*new)->write);
    FD_ZERO((*new)->except);
    FD_ZERO((*new)->read_set);
    FD_ZERO((*new)->write_set);
    FD_ZERO((*new)->except_set);
    (*new)->highsock = -1;
    return APR_SUCCESS;
}

apr_status_t apr_poll_socket_add(apr_pollfd_t *aprset,
                               apr_socket_t *sock, apr_int16_t event)
{
    if (event & APR_POLLIN) {
        FD_SET(sock->socketdes, aprset->read_set);
    }
    if (event & APR_POLLPRI) {
        FD_SET(sock->socketdes, aprset->read_set);
    }
    if (event & APR_POLLOUT) {
        FD_SET(sock->socketdes, aprset->write_set);
    }
    if (sock->socketdes > aprset->highsock) {
        aprset->highsock = sock->socketdes;
    }
    return APR_SUCCESS;
}

apr_status_t apr_poll_socket_mask(apr_pollfd_t *aprset, 
                                  apr_socket_t *sock, 
                                  apr_int16_t events)
{
    if (events & APR_POLLIN) {
        FD_CLR(sock->socketdes, aprset->read_set);
    }
    if (events & APR_POLLPRI) {
        FD_CLR(sock->socketdes, aprset->except_set);
    }
    if (events & APR_POLLOUT) {
        FD_CLR(sock->socketdes, aprset->write_set);
    }
    return APR_SUCCESS;
}

apr_status_t apr_poll(apr_pollfd_t *aprset, apr_int32_t *nsds, 
		    apr_interval_time_t timeout)
{
    int rv;
    struct timeval tv, *tvptr;

    if (timeout < 0) {
        tvptr = NULL;
    }
    else {
        tv.tv_sec = timeout / APR_USEC_PER_SEC;
        tv.tv_usec = timeout % APR_USEC_PER_SEC;
        tvptr = &tv;
    }

    memcpy(aprset->read, aprset->read_set, sizeof(fd_set));
    memcpy(aprset->write, aprset->write_set, sizeof(fd_set));
    memcpy(aprset->except, aprset->except_set, sizeof(fd_set));

    rv = select(aprset->highsock + 1, aprset->read, aprset->write, 
                aprset->except, tvptr);
    
    (*nsds) = rv;
    if ((*nsds) == 0) {
        return APR_TIMEUP;
    }
    if ((*nsds) < 0) {
        return APR_EEXIST;
    }
    return APR_SUCCESS;
}

apr_status_t apr_poll_revents_get(apr_int16_t *event, apr_socket_t *sock, apr_pollfd_t *aprset)
{
    apr_int16_t revents = 0;
    char data[1];
    int flags = 0;

    if (FD_ISSET(sock->socketdes, aprset->read)) {
        revents |= APR_POLLIN;
        if (sock->connected
	    && recv(sock->socketdes, data, 0 /*sizeof data*/, flags) == -1) {
            switch (errno) {
                case ECONNRESET:
                case ECONNABORTED:
                case ESHUTDOWN:
                case ENETRESET:
                    revents ^= APR_POLLIN;
                    revents |= APR_POLLHUP;
                    break;
                case ENOTSOCK:
                    revents ^= APR_POLLIN;
                    revents |= APR_POLLNVAL;
                    break;
                default:
                    revents ^= APR_POLLIN;
                    revents |= APR_POLLERR;
                    break;
            }
        }
    }
    if (FD_ISSET(sock->socketdes, aprset->write)) {
        revents |= APR_POLLOUT;
    }
    /* I am assuming that the except is for out of band data, not a failed
     * connection on a non-blocking socket.  Might be a bad assumption, but
     * it works for now. rbb.
     */
    if (FD_ISSET(sock->socketdes, aprset->except)) {
        revents |= APR_POLLPRI;
    }

    (*event) = revents;
    return APR_SUCCESS;
}

apr_status_t apr_poll_socket_remove(apr_pollfd_t *aprset, apr_socket_t *sock)
{
    FD_CLR(sock->socketdes, aprset->read_set);
    FD_CLR(sock->socketdes, aprset->except_set);
    FD_CLR(sock->socketdes, aprset->write_set);
    return APR_SUCCESS;
}

apr_status_t apr_poll_socket_clear(apr_pollfd_t *aprset, apr_int16_t event)
{
    if (event & APR_POLLIN) {
        FD_ZERO(aprset->read_set);
    }
    if (event & APR_POLLPRI) {
        FD_ZERO(aprset->except_set);
    }
    if (event & APR_POLLOUT) {
        FD_ZERO(aprset->write_set);
    }
    aprset->highsock = 0;
    return APR_SUCCESS;
}

apr_status_t apr_poll_data_get(apr_pollfd_t *pollfd, const char *key, void *data)
{
    return apr_pool_userdata_get(data, key, pollfd->cntxt);
}

apr_status_t apr_poll_data_set(apr_pollfd_t *pollfd, void *data, const char *key,
                            apr_status_t (*cleanup) (void *))
{
    return apr_pool_userdata_set(data, key, cleanup, pollfd->cntxt);
}

#endif /* BEOS_BONE */