+static int signal_compare(const signal_t *a, const signal_t *b) {
+ return (int)a->signum - (int)b->signum;
+}
+
+static void signalio_handler(event_loop_t *loop, void *data, int flags) {
+ (void)data;
+ (void)flags;
+ unsigned char signum;
+
+ if(read(loop->pipefd[0], &signum, 1) != 1) {
+ return;
+ }
+
+ signal_t *sig = splay_search(&loop->signals, &(signal_t) {
+ .signum = signum
+ });
+
+ if(sig) {
+#ifdef HAVE_STDATOMIC_H
+ atomic_flag_clear(&sig->set);
+#endif
+ sig->cb(loop, sig->data);
+ }
+}
+
+static void pipe_init(event_loop_t *loop) {
+ int result = pipe(loop->pipefd);
+ assert(result == 0);
+
+ if(result == 0) {
+#ifdef O_NONBLOCK
+ fcntl(loop->pipefd[0], F_SETFL, O_NONBLOCK);
+ fcntl(loop->pipefd[1], F_SETFL, O_NONBLOCK);
+#endif
+ io_add(loop, &loop->signalio, signalio_handler, NULL, loop->pipefd[0], IO_READ);
+ }
+}
+
+static void pipe_exit(event_loop_t *loop) {
+ io_del(loop, &loop->signalio);
+
+ close(loop->pipefd[0]);
+ close(loop->pipefd[1]);
+
+ loop->pipefd[0] = -1;
+ loop->pipefd[1] = -1;
+}
+
+void signal_trigger(event_loop_t *loop, signal_t *sig) {
+#ifdef HAVE_STDATOMIC_H
+
+ if(atomic_flag_test_and_set(&sig->set)) {
+ return;
+ }
+
+#endif
+
+ uint8_t signum = sig->signum;
+ write(loop->pipefd[1], &signum, 1);
+ return;
+}
+
+void signal_add(event_loop_t *loop, signal_t *sig, signal_cb_t cb, void *data, uint8_t signum) {
+ assert(!sig->cb);
+
+ sig->cb = cb;
+ sig->data = data;
+ sig->signum = signum;
+ sig->node.data = sig;
+
+#ifdef HAVE_STDATOMIC_H
+ atomic_flag_clear(&sig->set);
+#endif
+
+ if(loop->pipefd[0] == -1) {
+ pipe_init(loop);
+ }
+
+ if(!splay_insert_node(&loop->signals, &sig->node)) {
+ abort();
+ }
+}
+
+void signal_del(event_loop_t *loop, signal_t *sig) {
+ assert(sig->cb);
+
+ loop->deletion = true;
+
+ splay_unlink_node(&loop->signals, &sig->node);
+ sig->cb = NULL;
+
+ if(!loop->signals.count && loop->pipefd[0] != -1) {
+ pipe_exit(loop);
+ }
+}
+
+void idle_set(event_loop_t *loop, idle_cb_t cb, void *data) {
+ loop->idle_cb = cb;
+ loop->idle_data = data;
+}
+
+static void check_bad_fds(event_loop_t *loop, meshlink_handle_t *mesh) {
+ // Just call all registered callbacks and have them check their fds
+
+ do {
+ loop->deletion = false;
+
+ for splay_each(io_t, io, &loop->ios) {
+ if(io->flags & IO_WRITE) {
+ io->cb(loop, io->data, IO_WRITE);
+ }
+
+ if(loop->deletion) {
+ break;
+ }
+
+ if(io->flags & IO_READ) {
+ io->cb(loop, io->data, IO_READ);
+ }
+
+ if(loop->deletion) {
+ break;
+ }
+ }
+ } while(loop->deletion);
+
+ // Rebuild the fdsets
+
+ fd_set old_readfds;
+ fd_set old_writefds;
+ memcpy(&old_readfds, &loop->readfds, sizeof(old_readfds));
+ memcpy(&old_writefds, &loop->writefds, sizeof(old_writefds));
+
+ memset(&loop->readfds, 0, sizeof(loop->readfds));
+ memset(&loop->writefds, 0, sizeof(loop->writefds));
+
+ for splay_each(io_t, io, &loop->ios) {
+ if(io->flags & IO_READ) {
+ FD_SET(io->fd, &loop->readfds);
+ io->cb(loop, io->data, IO_READ);
+ }
+
+ if(io->flags & IO_WRITE) {
+ FD_SET(io->fd, &loop->writefds);
+ io->cb(loop, io->data, IO_WRITE);
+ }
+ }
+
+ if(memcmp(&old_readfds, &loop->readfds, sizeof(old_readfds))) {
+ logger(mesh, MESHLINK_WARNING, "Incorrect readfds fixed");
+ }
+
+ if(memcmp(&old_writefds, &loop->writefds, sizeof(old_writefds))) {
+ logger(mesh, MESHLINK_WARNING, "Incorrect writefds fixed");
+ }
+}
+
+bool event_loop_run(event_loop_t *loop, meshlink_handle_t *mesh) {
+ assert(mesh);