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

#define POLLFD(ptr)	((struct pollfd *)(ptr))
#define SWAP(a, b)	((a)^=(b),(b)^=(a),(a)^=(b))

static
inline
int
sortEvents(const void * a, const void * b)
{
	return POLLFD(a)->events > POLLFD(b)->events ?
		-1 : POLLFD(a)->events < POLLFD(b)->events ?
		1 : 0;
}

static
inline
int
sortRevents(const void * a, const void * b)
{
	return POLLFD(a)->revents > POLLFD(b)->revents ?
		-1 : POLLFD(a)->revents < POLLFD(b)->revents ?
		1 : 0;
}

static
int
serverPoll(Server this) {
	int events;

	/**
	 * put all closed fds to end of array in O(this->nfds)
	 */
	struct pollfd * fda = &(this->fds[1]);
	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));
			memset(fdb, 0, 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;
				/* Fallthrough */

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

	return events;
}

// vim: set ts=4 sw=4: