src/server/poll.c

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#include <poll.h>
#include <errno.h>

#include "server.h"
#include "logger.h"

#include "utils/signalHandling.h"

#define POLLFD(ptr)     ((struct pollfd *)(ptr))

int
serverPoll(Server this) {
        int events;

        struct pollfd * fda = &(this->fds[2]);
        struct pollfd * fdb = &(this->fds[this->nfds-1]);

        while (fda <= fdb) {
                while (0 == fdb->fd && fda <= fdb) {
                        fdb--;
                        this->nfds--;
                }

                while (0 != fda->fd && fda <= fdb) fda++;

                if (fda < fdb) {
                        memcpy(fda, fdb, sizeof(struct pollfd));
                        fdb--;
                        this->nfds--;
                }
        }

        /*
         * wait for handles to become ready
         */
        if (-1 == (events = poll(this->fds, this->nfds, -1))) {
                switch (errno) {
                        default:
                        case EBADF:
                        case EINVAL:
                        case ENOMEM:
                                doShutdown = 1;
                                // DROP THROUGH

                        case EINTR:
                                loggerLog(this->logger, LOGGER_CRIT,
                                                "poll systemcall failed: [%s] - service terminated",
                                                strerror(errno));
                }
        }

        return events;
}

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