static int fdw_poll_add_fd(int idx, t_fdwatch_type rw)
{
static int ridx;
// eventlog(eventlog_level_trace, __FUNCTION__, "called fd: %d rw: %d", fd, rw);
if (_ridx[idx] < 0) {
ridx = nofds++;
fds[ridx].fd = fdw_fd(fdw_fds + idx);
_ridx[idx] = ridx;
_rridx[ridx] = idx;
// eventlog(eventlog_level_trace, __FUNCTION__, "adding new_ fd on %d", ridx);
} else {
if (fds[_ridx[idx]].fd != fdw_fd(fdw_fds + idx)) {
eventlog(eventlog_level_error,__FUNCTION__,"BUG: found existent poll_fd entry for same idx with different fd");
return -1;
}
ridx = _ridx[idx];
// eventlog(eventlog_level_trace, __FUNCTION__, "updating fd on %d", ridx);
}
fds[ridx].events = 0;
if (rw & fdwatch_type_read) fds[ridx].events |= POLLIN;
if (rw & fdwatch_type_write) fds[ridx].events |= POLLOUT;
return 0;
}
static int fdw_select_cb(t_fdwatch_fd *cfd, void *data)
{
// eventlog(eventlog_level_trace, __FUNCTION__, "idx: %d fd: %d", idx, fdw_fd->fd);
if (fdw_rw(cfd) & fdwatch_type_read && PSOCK_FD_ISSET(fdw_fd(cfd), rfds)
&& fdw_hnd(cfd)(fdw_data(cfd), fdwatch_type_read) == -2) return 0;
if (fdw_rw(cfd) & fdwatch_type_write && PSOCK_FD_ISSET(fdw_fd(cfd), wfds))
fdw_hnd(cfd)(fdw_data(cfd), fdwatch_type_write);
return 0;
}
extern int fdwatch_del_fd(int idx)
{
if (idx < 0 || idx >= fdw_maxcons) {
ERROR2("out of bounds idx [{}] (max: {})", idx, fdw_maxcons);
return -1;
}
t_fdwatch_fd *cfd = fdw_fds + idx;
if (!fdw_rw(cfd)) {
ERROR0("found reseted rw");
return -1;
}
fdw->del(idx);
/* remove it from uselist, add it to freelist */
uselist.remove(*cfd);
freelist.push_back(*cfd);
fdw_fd(cfd) = 0;
fdw_rw(cfd) = 0;
fdw_data(cfd) = NULL;
fdw_hnd(cfd) = NULL;
return 0;
}
static int fdw_select_del_fd(int idx)
{
int fd;
fd = fdw_fd(fdw_fds + idx);
// eventlog(eventlog_level_trace, __FUNCTION__, "called fd: %d", fd);
if (sr > 0)
eventlog(eventlog_level_error, __FUNCTION__, "BUG: called while still handling sockets");
PSOCK_FD_CLR(fd, trfds);
PSOCK_FD_CLR(fd, twfds);
return 0;
}
static int fdw_select_add_fd(int idx, t_fdwatch_type rw)
{
int fd;
// eventlog(eventlog_level_trace, __FUNCTION__, "called fd: %d rw: %d", fd, rw);
fd = fdw_fd(fdw_fds + idx);
/* select() interface is limited by FD_SETSIZE max socket value */
if (fd >= FD_SETSIZE) return -1;
if (rw & fdwatch_type_read) PSOCK_FD_SET(fd, trfds);
else PSOCK_FD_CLR(fd, trfds);
if (rw & fdwatch_type_write) PSOCK_FD_SET(fd, twfds);
else PSOCK_FD_CLR(fd, twfds);
if (smaxfd < fd) smaxfd = fd;
return 0;
}
int
FDWEpollBackend::del(int idx)
{
// eventlog(eventlog_level_trace, __FUNCTION__, "called fd: %d", fd);
if (sr > 0)
ERROR0("BUG: called while still handling sockets");
if (fdw_rw(fdw_fds + idx)) {
struct epoll_event tmpev;
std::memset(&tmpev, 0, sizeof(tmpev));
tmpev.events = 0;
tmpev.data.fd = idx;
if (epoll_ctl(epfd, EPOLL_CTL_DEL, fdw_fd(fdw_fds + idx), &tmpev)) {
ERROR0("got error from epoll_ctl()");
return -1;
}
}
return 0;
}
extern int fdwatch_add_fd(int fd, unsigned rw, fdwatch_handler h, void *data)
{
/* max sockets reached */
if (freelist.empty()) return -1;
t_fdwatch_fd *cfd = &freelist.front();
fdw_fd(cfd) = fd;
if (fdw->add(fdw_idx(cfd), rw)) return -1;
/* add it to used sockets list, remove it from free list */
uselist.push_back(*cfd);
freelist.remove(*cfd);
fdw_rw(cfd) = rw;
fdw_data(cfd) = data;
fdw_hnd(cfd) = h;
return fdw_idx(cfd);
}
int
FDWEpollBackend::add(int idx, unsigned rw)
{
// eventlog(eventlog_level_trace, __FUNCTION__, "called fd: %d rw: %d", fd, rw);
struct epoll_event tmpev;
std::memset(&tmpev, 0, sizeof(tmpev));
tmpev.events = 0;
if (rw & fdwatch_type_read)
tmpev.events |= EPOLLIN;
if (rw & fdwatch_type_write)
tmpev.events |= EPOLLOUT;
int op = fdw_rw(fdw_fds + idx) ? EPOLL_CTL_MOD : EPOLL_CTL_ADD;
tmpev.data.fd = idx;
if (epoll_ctl(epfd, op, fdw_fd(fdw_fds + idx), &tmpev)) {
ERROR0("got error from epoll_ctl()");
return -1;
}
return 0;
}
int
FDWKqueueBackend::add(int idx, unsigned rw)
{
int idxr;
t_fdwatch_fd *cfd = fdw_fds + idx;
/* eventlog(eventlog_level_trace, __FUNCTION__, "called fd: %d rw: %d", fd, rw); */
/* adding read event filter */
if (!(fdw_rw(cfd) & fdwatch_type_read) && rw & fdwatch_type_read)
{
if (rridx[idx] >= 0 && rridx[idx] < nochanges && kqchanges[rridx[idx]].ident == fdw_fd(cfd))
{
idxr = rridx[idx];
/* eventlog(eventlog_level_trace, __FUNCTION__, "updating change event (read) fd on %d", ridx); */
} else {
idxr = nochanges++;
rridx[idx] = idxr;
/* eventlog(eventlog_level_trace, __FUNCTION__, "adding new change event (read) fd on %d", ridx); */
}
EV_SET(kqchanges.get() + idxr, fdw_fd(cfd), EVFILT_READ, EV_ADD, 0, 0, (void*)idx);
}
else if (fdw_rw(cfd) & fdwatch_type_read && !( rw & fdwatch_type_read))
{
if (rridx[idx] >= 0 && rridx[idx] < nochanges && kqchanges[rridx[idx]].ident == fdw_fd(cfd))
{
idxr = rridx[idx];
/* eventlog(eventlog_level_trace, __FUNCTION__, "updating change event (read) fd on %d", ridx); */
} else {
idxr = nochanges++;
rridx[idx] = idxr;
/* eventlog(eventlog_level_trace, __FUNCTION__, "adding new change event (read) fd on %d", ridx); */
}
EV_SET(kqchanges.get() + idxr, fdw_fd(cfd), EVFILT_READ, EV_DELETE, 0, 0, (void*)idx);
}
/* adding write event filter */
if (!(fdw_rw(cfd) & fdwatch_type_write) && rw & fdwatch_type_write)
{
if (wridx[idx] >= 0 && wridx[idx] < nochanges && kqchanges[wridx[idx]].ident == fdw_fd(cfd))
{
idxr = wridx[idx];
/* eventlog(eventlog_level_trace, __FUNCTION__, "updating change event (write) fd on %d", ridx); */
} else {
idxr = nochanges++;
wridx[idx] = idxr;
/* eventlog(eventlog_level_trace, __FUNCTION__, "adding new change event (write) fd on %d", ridx); */
}
EV_SET(kqchanges.get() + idxr, fdw_fd(cfd), EVFILT_WRITE, EV_ADD, 0, 0, (void*)idx);
}
else if (fdw_rw(cfd) & fdwatch_type_write && !(rw & fdwatch_type_write))
{
if (wridx[idx] >= 0 && wridx[idx] < nochanges && kqchanges[wridx[idx]].ident == fdw_fd(cfd))
{
idxr = wridx[idx];
/* eventlog(eventlog_level_trace, __FUNCTION__, "updating change event (write) fd on %d", ridx); */
} else {
idxr = nochanges++;
wridx[idx] = idxr;
/* eventlog(eventlog_level_trace, __FUNCTION__, "adding new change event (write) fd on %d", ridx); */
}
EV_SET(kqchanges.get() + idxr, fdw_fd(cfd), EVFILT_WRITE, EV_DELETE, 0, 0, (void*)idx);
}
return 0;
}
int
FDWKqueueBackend::del(int idx)
{
/* eventlog(eventlog_level_trace, __FUNCTION__, "called fd: %d", fd); */
if (sr > 0)
eventlog(eventlog_level_error, __FUNCTION__, "BUG: called while still handling sockets");
t_fdwatch_fd *cfd = fdw_fds + idx;
/* the last event changes about this fd has not yet been sent to kernel */
if (fdw_rw(cfd) & fdwatch_type_read &&
nochanges && rridx[idx] >= 0 && rridx[idx] < nochanges &&
kqchanges[rridx[idx]].ident == fdw_fd(cfd))
{
nochanges--;
if (rridx[idx] < nochanges)
{
int oidx;
oidx = (unsigned long)(kqchanges[nochanges].udata);
if (kqchanges[nochanges].filter == EVFILT_READ &&
rridx[oidx] == nochanges)
{
/* eventlog(eventlog_level_trace, __FUNCTION__, "not last, moving %d", kqchanges[rnfds].ident); */
rridx[oidx] = rridx[idx];
std::memcpy(kqchanges.get() + rridx[idx], kqchanges.get() + nochanges, sizeof(struct kevent));
}
if (kqchanges[nochanges].filter == EVFILT_WRITE &&
wridx[oidx] == nochanges)
{
/* eventlog(eventlog_level_trace, __FUNCTION__, "not last, moving %d", kqchanges[rnfds].ident); */
wridx[oidx] = rridx[idx];
std::memcpy(kqchanges.get() + rridx[idx], kqchanges.get() + nochanges, sizeof(struct kevent));
}
}
rridx[idx] = -1;
}
if (fdw_rw(cfd) & fdwatch_type_write &&
nochanges && wridx[idx] >= 0 && wridx[idx] < nochanges &&
kqchanges[wridx[idx]].ident == fdw_fd(cfd))
{
nochanges--;
if (wridx[idx] < nochanges)
{
int oidx;
oidx = (unsigned long)(kqchanges[nochanges].udata);
if (kqchanges[nochanges].filter == EVFILT_READ &&
rridx[oidx] == nochanges)
{
/* eventlog(eventlog_level_trace, __FUNCTION__, "not last, moving %d", kqchanges[rnfds].ident); */
rridx[oidx] = wridx[idx];
std::memcpy(kqchanges.get() + wridx[idx], kqchanges.get() + nochanges, sizeof(struct kevent));
}
if (kqchanges[nochanges].filter == EVFILT_WRITE &&
wridx[oidx] == nochanges)
{
/* eventlog(eventlog_level_trace, __FUNCTION__, "not last, moving %d", kqchanges[rnfds].ident); */
wridx[oidx] = wridx[idx];
std::memcpy(kqchanges.get() + wridx[idx], kqchanges.get() + nochanges, sizeof(struct kevent));
}
}
wridx[idx] = -1;
}
/* here we presume the calling code does close() on the socket and if so
* it is automatically removed from any kernel kqueues */
return 0;
}