lighttpd 1.4.x https://www.lighttpd.net/
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lighttpd1.4/src/fdevent_freebsd_kqueue.c

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#include <sys/types.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <signal.h>
#include <fcntl.h>
#include "fdevent.h"
#include "settings.h"
#include "buffer.h"
#include "server.h"
#ifdef USE_FREEBSD_KQUEUE
#include <sys/event.h>
#include <sys/time.h>
static void fdevent_freebsd_kqueue_free(fdevents *ev) {
close(ev->kq_fd);
free(ev->kq_results);
bitset_free(ev->kq_bevents);
}
static int fdevent_freebsd_kqueue_event_del(fdevents *ev, int fde_ndx, int fd) {
int filter, ret;
struct kevent kev;
struct timespec ts;
if (fde_ndx < 0) return -1;
filter = bitset_test_bit(ev->kq_bevents, fd) ? EVFILT_READ : EVFILT_WRITE;
EV_SET(&kev, fd, filter, EV_DELETE, 0, 0, NULL);
ts.tv_sec = 0;
ts.tv_nsec = 0;
ret = kevent(ev->kq_fd,
&kev, 1,
NULL, 0,
&ts);
if (ret == -1) {
fprintf(stderr, "%s.%d: kqueue failed polling: %s\n",
__FILE__, __LINE__, strerror(errno));
return -1;
}
return -1;
}
static int fdevent_freebsd_kqueue_event_add(fdevents *ev, int fde_ndx, int fd, int events) {
int filter, ret;
struct kevent kev;
struct timespec ts;
UNUSED(fde_ndx);
filter = (events & FDEVENT_IN) ? EVFILT_READ : EVFILT_WRITE;
EV_SET(&kev, fd, filter, EV_ADD|EV_CLEAR, 0, 0, NULL);
ts.tv_sec = 0;
ts.tv_nsec = 0;
ret = kevent(ev->kq_fd,
&kev, 1,
NULL, 0,
&ts);
if (ret == -1) {
fprintf(stderr, "%s.%d: kqueue failed polling: %s\n",
__FILE__, __LINE__, strerror(errno));
return -1;
}
if (filter == EVFILT_READ) {
bitset_set_bit(ev->kq_bevents, fd);
} else {
bitset_clear_bit(ev->kq_bevents, fd);
}
return fd;
}
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_event_get_revent(fdevents *ev, size_t 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;
}
return events;
}
static int fdevent_freebsd_kqueue_event_get_fd(fdevents *ev, size_t ndx) {
return ev->kq_results[ndx].ident;
}
static int fdevent_freebsd_kqueue_event_next_fdndx(fdevents *ev, int ndx) {
UNUSED(ev);
return (ndx < 0) ? 0 : ndx + 1;
}
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(event_next_fdndx);
SET(event_get_fd);
SET(event_get_revent);
ev->kq_fd = -1;
ev->kq_results = calloc(ev->maxfds, sizeof(*ev->kq_results));
ev->kq_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