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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 "fdevent.h"
#include "settings.h"
#include "buffer.h"
#include "log.h"
#ifdef USE_POLL
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, iosocket *sock) {
if (sock->fde_ndx < 0) return -1;
if ((size_t)sock->fde_ndx >= ev->used) {
SEGFAULT("(fdevent-poll-del) out of range %d %zd", sock->fde_ndx, ev->used);
}
if (ev->pollfds[sock->fde_ndx].fd == sock->fd) {
size_t k = sock->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 {
SEGFAULT("(fdevent-poll-del) sock->fde_ndx: %d, sock->fd: %d -> stored fd: %d", sock->fde_ndx, sock->fd, ev->pollfds[sock->fde_ndx].fd);
}
sock->fde_ndx = -1;
return 0;
}
#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_add(fdevents *ev, iosocket *sock, int events) {
if (sock->fde_ndx != -1) {
/* this fd was already added, just change the requested events */
if (ev->pollfds[sock->fde_ndx].fd == sock->fd) {
ev->pollfds[sock->fde_ndx].events = events;
return sock->fde_ndx;
}
SEGFAULT("(fdevent-poll-add) (%d, %d)", sock->fde_ndx, ev->pollfds[sock->fde_ndx].fd);
}
if (ev->unused.used > 0) {
int k = ev->unused.ptr[--ev->unused.used];
ev->pollfds[k].fd = sock->fd;
ev->pollfds[k].events = events;
sock->fde_ndx = 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 = sock->fd;
ev->pollfds[ev->used].events = events;
sock->fde_ndx = ev->used++;
}
return 0;
}
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_get_revents(fdevents *ev, size_t event_count, fdevent_revents *revents) {
size_t ndx;
UNUSED(event_count);
for (ndx = 0; ndx < ev->used; ndx++) {
if (ev->pollfds[ndx].revents) {
if (ev->pollfds[ndx].revents & POLLNVAL) {
/* should never happen */
SEGFAULT("ev->pollfds[%zu].revents has POLLNVAL", ndx);
}
fdevent_revents_add(revents, ev->pollfds[ndx].fd, ev->pollfds[ndx].revents);
}
}
return 0;
}
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_add);
SET(get_revents);
return 0;
}
#else
int fdevent_poll_init(fdevents *ev) {
UNUSED(ev);
ERROR("event-handler 'poll' is not supported, try to set server.event-handler = \"%s\"", "select");
return -1;
}
#endif
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