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#include <sys/types.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <signal.h>
#include <fcntl.h>
#include "server.h"
#include "fdevent.h"
#include "settings.h"
#include "buffer.h"
#ifdef USE_FREEBSD_KQUEUE
#include <sys/event.h>
#include <sys/time.h>
#include "sys-files.h"
#include "log.h"
static int fdevent_freebsd_kqueue_event_add(fdevents *ev, iosocket *sock, int events);
static void fdevent_freebsd_kqueue_free(fdevents *ev) {
close(ev->kq_fd);
free(ev->kq_results);
bitset_free(ev->kq_read_bevents);
bitset_free(ev->kq_write_bevents);
}
static int fdevent_freebsd_kqueue_event_del(fdevents *ev, iosocket *sock) {
int ret;
if (sock->fde_ndx < 0) return -1;
/* delete events */
ret = fdevent_freebsd_kqueue_event_add(ev, sock, 0);
sock->fde_ndx = -1;
return 0;
}
static int fdevent_freebsd_kqueue_event_add(fdevents *ev, iosocket *sock, int events) {
int ret;
struct kevent kev[2];
struct timespec ts;
int nchanges = 0;
int changed_events = 0;
if (bitset_test_bit(ev->kq_read_bevents, sock->fd)) {
changed_events |= FDEVENT_IN;
}
if (bitset_test_bit(ev->kq_write_bevents, sock->fd)) {
changed_events |= FDEVENT_OUT;
}
/* use XOR on changed_events and events to see which events changed. */
changed_events ^= events;
if (changed_events & FDEVENT_IN) {
/* add/delete FDEVENT_IN */
if (events & FDEVENT_IN) {
/* add */
EV_SET(&(kev[nchanges]), sock->fd, EVFILT_READ, EV_ADD, 0, 0, NULL);
nchanges++;
bitset_set_bit(ev->kq_read_bevents, sock->fd);
} else {
/* delete */
EV_SET(&(kev[nchanges]), sock->fd, EVFILT_READ, EV_DELETE, 0, 0, NULL);
nchanges++;
bitset_clear_bit(ev->kq_read_bevents, sock->fd);
}
}
if (changed_events & FDEVENT_OUT) {
/* add/delete FDEVENT_OUT */
if (events & FDEVENT_OUT) {
/* add */
EV_SET(&(kev[nchanges]), sock->fd, EVFILT_WRITE, EV_ADD, 0, 0, NULL);
nchanges++;
bitset_set_bit(ev->kq_write_bevents, sock->fd);
} else {
/* delete */
EV_SET(&(kev[nchanges]), sock->fd, EVFILT_WRITE, EV_DELETE, 0, 0, NULL);
nchanges++;
bitset_clear_bit(ev->kq_write_bevents, sock->fd);
}
}
if (nchanges == 0) return 0;
ts.tv_sec = 0;
ts.tv_nsec = 0;
ret = kevent(ev->kq_fd,
kev, nchanges,
NULL, 0,
&ts);
if (ret == -1) {
ERROR("kqueue failed polling: %s\n", strerror(errno));
return -1;
}
sock->fde_ndx = sock->fd;
return 0;
}
static int fdevent_freebsd_kqueue_poll(fdevents *ev, int timeout_ms) {
int ret;
struct timespec ts;
ts.tv_sec = timeout_ms / 1000;
ts.tv_nsec = (timeout_ms % 1000) * 1000000;
ret = kevent(ev->kq_fd,
NULL, 0,
ev->kq_results, ev->maxfds,
&ts);
if (ret == -1) {
switch(errno) {
case EINTR:
/* we got interrupted, perhaps just a SIGCHLD of a CGI script */
return 0;
default:
fprintf(stderr, "%s.%d: kqueue failed polling: %s\n",
__FILE__, __LINE__, strerror(errno));
break;
}
}
return ret;
}
static int fdevent_freebsd_kqueue_get_revents(fdevents *ev, size_t event_count, fdevent_revents *revents) {
size_t ndx;
for (ndx = 0; ndx < event_count; ndx++) {
int events = 0, e;
e = ev->kq_results[ndx].filter;
if (e == EVFILT_READ) {
events |= FDEVENT_IN;
} else if (e == EVFILT_WRITE) {
events |= FDEVENT_OUT;
}
e = ev->kq_results[ndx].flags;
if (e & EV_EOF) {
events |= FDEVENT_HUP;
}
if (e & EV_ERROR) {
events |= FDEVENT_ERR;
}
fdevent_revents_add(revents, ev->kq_results[ndx].ident, events);
}
return 0;
}
static int fdevent_freebsd_kqueue_reset(fdevents *ev) {
if (-1 == (ev->kq_fd = kqueue())) {
fprintf(stderr, "%s.%d: kqueue failed (%s), try to set server.event-handler = \"poll\" or \"select\"\n",
__FILE__, __LINE__, strerror(errno));
return -1;
}
return 0;
}
int fdevent_freebsd_kqueue_init(fdevents *ev) {
ev->type = FDEVENT_HANDLER_FREEBSD_KQUEUE;
#define SET(x) \
ev->x = fdevent_freebsd_kqueue_##x;
SET(free);
SET(poll);
SET(reset);
SET(event_del);
SET(event_add);
SET(get_revents);
ev->kq_fd = -1;
ev->kq_results = calloc(ev->maxfds, sizeof(*ev->kq_results));
ev->kq_read_bevents = bitset_init(ev->maxfds);
ev->kq_write_bevents = bitset_init(ev->maxfds);
/* check that kqueue works */
if (-1 == (ev->kq_fd = kqueue())) {
fprintf(stderr, "%s.%d: kqueue failed (%s), try to set server.event-handler = \"poll\" or \"select\"\n",
__FILE__, __LINE__, strerror(errno));
return -1;
}
close(ev->kq_fd);
ev->kq_fd = -1;
return 0;
}
#else
int fdevent_freebsd_kqueue_init(fdevents *ev) {
UNUSED(ev);
fprintf(stderr, "%s.%d: kqueue not available, try to set server.event-handler = \"poll\" or \"select\"\n",
__FILE__, __LINE__);
return -1;
}
#endif
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