Mirror of :pserver:anonymous@cvs.schmorp.de/schmorpforge libev http://software.schmorp.de/pkg/libev.html
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#include <sys/epoll.h>
static int epoll_fd = -1;
static void
epoll_reify_fd (int fd)
{
ANFD *anfd = anfds + fd;
struct ev_io *w;
int wev = 0;
for (w = anfd->head; w; w = w->next)
wev |= w->events;
if (anfd->wev != wev)
{
int mode = wev ? anfd->wev ? EPOLL_CTL_MOD : EPOLL_CTL_ADD : EPOLL_CTL_DEL;
struct epoll_event ev;
ev.events = wev;
ev.data.fd = fd;
fprintf (stderr, "reify %d,%d,%d m%d (r=%d)\n", fd, anfd->wev, wev, mode,//D
epoll_ctl (epoll_fd, mode, fd, &ev)
);//D
anfd->wev = wev;
}
}
void epoll_postfork_child (void)
{
int i;
epoll_fd = epoll_create (256);
for (i = 0; i < anfdmax; ++i)
epoll_reify_fd (i);
}
static void epoll_reify (void)
{
int i;
for (i = 0; i < fdchangecnt; ++i)
epoll_reify_fd (fdchanges [i]);
}
static struct epoll_event *events;
static int eventmax;
static void epoll_poll (ev_tstamp timeout)
{
int eventcnt = epoll_wait (epoll_fd, events, eventmax, ceil (timeout * 1000.));
int i;
if (eventcnt < 0)
return;
for (i = 0; i < eventcnt; ++i)
fd_event (
events [i].data.fd,
(events [i].events & (EPOLLOUT | EPOLLERR | EPOLLHUP | EPOLLPRI) ? EV_WRITE : 0)
| (events [i].events & (EPOLLIN | EPOLLERR | EPOLLHUP) ? EV_READ : 0)
);
/* if the receive array was full, increase its size */
if (eventcnt == eventmax)
{
free (events);
eventmax += eventmax >> 1;
events = malloc (sizeof (struct epoll_event) * eventmax);
}
}
int epoll_init (int flags)
{
epoll_fd = epoll_create (256);
if (epoll_fd < 0)
return 0;
ev_method = EVMETHOD_EPOLL;
method_fudge = 1e-3; /* needed to compensate fro epoll returning early */
method_reify = epoll_reify;
method_poll = epoll_poll;
eventmax = 64; /* intiial number of events receivable per poll */
events = malloc (sizeof (struct epoll_event) * eventmax);
return 1;
}