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#include "fdevent.h"
#include "buffer.h"
#include "log.h"
#include <assert.h>
#ifdef USE_LIBEV
# include <ev.h>
static void io_watcher_cb(struct ev_loop *loop, ev_io *w, int revents) {
fdevents *ev = w->data;
fdnode *fdn = ev->fdarray[w->fd];
int r = 0;
UNUSED(loop);
if (revents & EV_READ) r |= FDEVENT_IN;
if (revents & EV_WRITE) r |= FDEVENT_OUT;
if (revents & EV_ERROR) r |= FDEVENT_ERR;
switch (r = (*fdn->handler)(ev->srv, fdn->ctx, r)) {
case HANDLER_FINISHED:
case HANDLER_GO_ON:
case HANDLER_WAIT_FOR_EVENT:
case HANDLER_WAIT_FOR_FD:
break;
case HANDLER_ERROR:
/* should never happen */
SEGFAULT();
break;
default:
log_error_write(ev->srv, __FILE__, __LINE__, "d", r);
break;
}
}
static void fdevent_libev_free(fdevents *ev) {
UNUSED(ev);
}
static int fdevent_libev_event_del(fdevents *ev, int fde_ndx, int fd) {
fdnode *fdn;
ev_io *watcher;
if (-1 == fde_ndx) return -1;
fdn = ev->fdarray[fd];
watcher = fdn->handler_ctx;
if (!watcher) return -1;
ev_io_stop(ev->libev_loop, watcher);
free(watcher);
fdn->handler_ctx = NULL;
return -1;
}
static int fdevent_libev_event_set(fdevents *ev, int fde_ndx, int fd, int events) {
fdnode *fdn = ev->fdarray[fd];
ev_io *watcher = fdn->handler_ctx;
int ev_events = 0;
UNUSED(fde_ndx);
if (events & FDEVENT_IN) ev_events |= EV_READ;
if (events & FDEVENT_OUT) ev_events |= EV_WRITE;
if (!watcher) {
fdn->handler_ctx = watcher = calloc(1, sizeof(ev_io));
assert(watcher);
ev_io_init(watcher, io_watcher_cb, fd, ev_events);
watcher->data = ev;
ev_io_start(ev->libev_loop, watcher);
} else {
if ((watcher->events & (EV_READ | EV_WRITE)) != ev_events) {
ev_io_stop(ev->libev_loop, watcher);
ev_io_set(watcher, watcher->fd, ev_events);
ev_io_start(ev->libev_loop, watcher);
}
}
return fd;
}
static void timeout_watcher_cb(struct ev_loop *loop, ev_timer *w, int revents) {
UNUSED(loop);
UNUSED(w);
UNUSED(revents);
}
static int fdevent_libev_poll(fdevents *ev, int timeout_ms) {
ev_timer timeout_watcher;
ev_init(&timeout_watcher, timeout_watcher_cb);
ev_timer_set(&timeout_watcher, ((ev_tstamp) timeout_ms)/1000.0, 0.0);
ev_timer_start(ev->libev_loop, &timeout_watcher);
ev_loop(ev->libev_loop, EVLOOP_ONESHOT);
ev_timer_stop(ev->libev_loop, &timeout_watcher);
return 0;
}
static int fdevent_libev_event_get_revent(fdevents *ev, size_t ndx) {
UNUSED(ev);
UNUSED(ndx);
return 0;
}
static int fdevent_libev_event_get_fd(fdevents *ev, size_t ndx) {
UNUSED(ev);
UNUSED(ndx);
return -1;
}
static int fdevent_libev_event_next_fdndx(fdevents *ev, int ndx) {
UNUSED(ev);
UNUSED(ndx);
return -1;
}
static int fdevent_libev_reset(fdevents *ev) {
UNUSED(ev);
ev_default_fork();
return 0;
}
int fdevent_libev_init(fdevents *ev) {
ev->type = FDEVENT_HANDLER_LIBEV;
#define SET(x) \
ev->x = fdevent_libev_##x;
SET(free);
SET(poll);
SET(reset);
SET(event_del);
SET(event_set);
SET(event_next_fdndx);
SET(event_get_fd);
SET(event_get_revent);
if (NULL == (ev->libev_loop = ev_default_loop(0))) {
log_error_write(ev->srv, __FILE__, __LINE__, "S",
"ev_default_loop failed , try to set server.event-handler = \"poll\" or \"select\"");
return -1;
}
return 0;
}
#else
int fdevent_libev_init(fdevents *ev) {
UNUSED(ev);
log_error_write(ev->srv, __FILE__, __LINE__, "S",
"libev not supported, try to set server.event-handler = \"poll\" or \"select\"");
return -1;
}
#endif
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