lighttpd 1.4.x https://www.lighttpd.net/
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#include "fdevent.h"
#include "buffer.h"
#include "log.h"
#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>
#ifdef USE_POLL
# ifdef HAVE_POLL_H
# include <poll.h>
# else
# include <sys/poll.h>
# endif
static void fdevent_poll_free(fdevents *ev) {
free(ev->pollfds);
if (ev->unused.ptr) free(ev->unused.ptr);
}
static int fdevent_poll_event_del(fdevents *ev, int fde_ndx, int fd) {
if (fde_ndx < 0) return -1;
if ((size_t)fde_ndx >= ev->used) {
log_error_write(ev->srv, __FILE__, __LINE__, "SdD",
"del! out of range ", fde_ndx, (int) ev->used);
SEGFAULT();
}
if (ev->pollfds[fde_ndx].fd == fd) {
size_t k = fde_ndx;
ev->pollfds[k].fd = -1;
/* ev->pollfds[k].events = 0; */
/* ev->pollfds[k].revents = 0; */
if (ev->unused.size == 0) {
ev->unused.size = 16;
ev->unused.ptr = malloc(sizeof(*(ev->unused.ptr)) * ev->unused.size);
} else if (ev->unused.size == ev->unused.used) {
ev->unused.size += 16;
ev->unused.ptr = realloc(ev->unused.ptr, sizeof(*(ev->unused.ptr)) * ev->unused.size);
}
ev->unused.ptr[ev->unused.used++] = k;
} else {
log_error_write(ev->srv, __FILE__, __LINE__, "SdD",
"del! ", ev->pollfds[fde_ndx].fd, fd);
SEGFAULT();
}
return -1;
}
#if 0
static int fdevent_poll_event_compress(fdevents *ev) {
size_t j;
if (ev->used == 0) return 0;
if (ev->unused.used != 0) return 0;
for (j = ev->used - 1; j + 1 > 0 && ev->pollfds[j].fd == -1; j--) ev->used--;
return 0;
}
#endif
static int fdevent_poll_event_set(fdevents *ev, int fde_ndx, int fd, int events) {
int pevents = 0;
if (events & FDEVENT_IN) pevents |= POLLIN;
if (events & FDEVENT_OUT) pevents |= POLLOUT;
/* known index */
if (fde_ndx != -1) {
if (ev->pollfds[fde_ndx].fd == fd) {
ev->pollfds[fde_ndx].events = pevents;
return fde_ndx;
}
log_error_write(ev->srv, __FILE__, __LINE__, "SdD",
"set: ", fde_ndx, ev->pollfds[fde_ndx].fd);
SEGFAULT();
}
if (ev->unused.used > 0) {
int k = ev->unused.ptr[--ev->unused.used];
ev->pollfds[k].fd = fd;
ev->pollfds[k].events = pevents;
return k;
} else {
if (ev->size == 0) {
ev->size = 16;
ev->pollfds = malloc(sizeof(*ev->pollfds) * ev->size);
} else if (ev->size == ev->used) {
ev->size += 16;
ev->pollfds = realloc(ev->pollfds, sizeof(*ev->pollfds) * ev->size);
}
ev->pollfds[ev->used].fd = fd;
ev->pollfds[ev->used].events = pevents;
return ev->used++;
}
}
static int fdevent_poll_poll(fdevents *ev, int timeout_ms) {
#if 0
fdevent_poll_event_compress(ev);
#endif
return poll(ev->pollfds, ev->used, timeout_ms);
}
static int fdevent_poll_event_get_revent(fdevents *ev, size_t ndx) {
int r, poll_r;
if (ndx >= ev->used) {
log_error_write(ev->srv, __FILE__, __LINE__, "sii",
"dying because: event: ", (int) ndx, (int) ev->used);
SEGFAULT();
return 0;
}
if (ev->pollfds[ndx].revents & POLLNVAL) {
/* should never happen */
SEGFAULT();
}
r = 0;
poll_r = ev->pollfds[ndx].revents;
/* map POLL* to FDEVEN_*; they are probably the same, but still. */
if (poll_r & POLLIN) r |= FDEVENT_IN;
if (poll_r & POLLOUT) r |= FDEVENT_OUT;
if (poll_r & POLLERR) r |= FDEVENT_ERR;
if (poll_r & POLLHUP) r |= FDEVENT_HUP;
if (poll_r & POLLNVAL) r |= FDEVENT_NVAL;
if (poll_r & POLLPRI) r |= FDEVENT_PRI;
return r;
}
static int fdevent_poll_event_get_fd(fdevents *ev, size_t ndx) {
return ev->pollfds[ndx].fd;
}
static int fdevent_poll_event_next_fdndx(fdevents *ev, int ndx) {
size_t i;
i = (ndx < 0) ? 0 : ndx + 1;
for (; i < ev->used; i++) {
if (ev->pollfds[i].revents) return i;
}
return -1;
}
int fdevent_poll_init(fdevents *ev) {
ev->type = FDEVENT_HANDLER_POLL;
#define SET(x) \
ev->x = fdevent_poll_##x;
SET(free);
SET(poll);
SET(event_del);
SET(event_set);
SET(event_next_fdndx);
SET(event_get_fd);
SET(event_get_revent);
return 0;
}
#else
int fdevent_poll_init(fdevents *ev) {
UNUSED(ev);
log_error_write(srv, __FILE__, __LINE__,
"s", "poll is not supported, try to set server.event-handler = \"select\"");
return -1;
}
#endif