int plugin_io_init(plugin_t *p)
{
if (!is_io_plugin(p))
return 0;
_d("Initializing plugin %s for I/O", basename(p->name));
if (uev_io_init(ctx, &p->watcher, generic_io_cb, p, p->io.fd, p->io.flags)) {
_e("Failed setting up I/O plugin %s", basename(p->name));
return 1;
}
return 0;
}
/* Generic libev I/O callback, looks up correct plugin and calls its callback */
static void generic_io_cb(int fd, int events)
{
plugin_t *p, *tmp;
/* Find matching plugin, pick first matching fd */
PLUGIN_ITERATOR(p, tmp) {
if (is_io_plugin(p) && p->io.fd == fd) {
_d("Calling I/O %s from runloop...", basename(p->name));
p->io.cb(p->io.arg, fd, events);
break;
}
}
}
/* Setup any I/O callbacks for plugins that use them */
static void init_plugins(void)
{
int i = 0;
plugin_t *p, *tmp;
PLUGIN_ITERATOR(p, tmp) {
if (is_io_plugin(p)) {
_d("Initializing plugin %s for I/O", basename(p->name));
fds[i].revents = 0;
fds[i].events = p->io.flags;
fds[i++].fd = p->io.fd;
}
}
}
/* Generic libev I/O callback, looks up correct plugin and calls its callback */
static void generic_io_cb(uev_t *w, void *arg, int events)
{
plugin_t *p = (plugin_t *)arg;
if (is_io_plugin(p) && p->io.fd == w->fd) {
/* Stop watcher, callback may close descriptor on us ... */
uev_io_stop(w);
_d("Calling I/O %s from runloop...", basename(p->name));
p->io.cb(p->io.arg, w->fd, events);
/* Update fd, may be changed by plugin callback, e.g., if FIFO */
uev_io_set(w, p->io.fd, p->io.flags);
}
}
/* Generic libev I/O callback, looks up correct plugin and calls its callback */
static void generic_io_cb(struct pollfd *io)
{
plugin_t *p, *tmp;
/* Find matching plugin, pick first matching fd */
PLUGIN_ITERATOR(p, tmp) {
if (is_io_plugin(p) && p->io.fd == io->fd) {
_d("Calling I/O %s from runloop...", basename(p->name));
p->io.cb(p->io.arg, io->fd, io->events);
/* Update fd, may be changed by plugin callback, e.g., if FIFO */
io->fd = p->io.fd;
io->events = p->io.flags;
io->revents = 0;
break;
}
}
}
int plugin_register(plugin_t *plugin)
{
int i, inuse = 0;
if (!plugin) {
errno = EINVAL;
return 1;
}
if (!plugin->name) {
Dl_info info;
if (!dladdr(plugin, &info) || !info.dli_fname)
plugin->name = "unknown";
else
plugin->name = (char *)info.dli_fname;
}
/* Already registered? */
if (plugin_find(plugin->name)) {
_d("... %s already loaded.", plugin->name);
return 0;
}
check_plugin_depends(plugin);
if (is_io_plugin(plugin)) {
if (num_fds + 1 >= MAX_NUM_FDS) {
num_fds = MAX_NUM_SVC;
errno = ENOMEM;
return 1;
}
num_fds++;
inuse++;
}
if (plugin->svc.cb) {
svc_t *svc = svc_find(plugin->name);
if (svc) {
inuse++;
svc->cb = plugin->svc.cb;
svc->dynamic = plugin->svc.dynamic;
svc->dynamic_stop = plugin->svc.dynamic_stop;
}
}
for (i = 0; i < HOOK_MAX_NUM; i++) {
if (plugin->hook[i].cb)
inuse++;
}
if (!inuse) {
_d("No service \"%s\" loaded, and no I/O or finit hooks, skipping plugin.", basename(plugin->name));
return 1;
}
TAILQ_INSERT_TAIL(&plugins, plugin, link);
return 0;
}