Adding IPC v1.5.5 patch

patch/ipc.c

@@ -0,0 +1,60 @@
+static int epoll_fd;
+static int dpy_fd;
+static Monitor *lastselmon;
+
+int
+handlexevent(struct epoll_event *ev)
+{
+	if (ev->events & EPOLLIN) {
+		XEvent ev;
+		while (running && XPending(dpy)) {
+			XNextEvent(dpy, &ev);
+			if (handler[ev.type]) {
+				handler[ev.type](&ev); /* call handler */
+				ipc_send_events(mons, &lastselmon, selmon);
+			}
+		}
+	} else if (ev-> events & EPOLLHUP)
+		return -1;
+
+	return 0;
+}
+
+void
+setlayoutsafe(const Arg *arg)
+{
+	const Layout *ltptr = (Layout *)arg->v;
+	if (ltptr == 0)
+		setlayout(arg);
+	for (int i = 0; i < LENGTH(layouts); i++) {
+		if (ltptr == &layouts[i])
+			setlayout(arg);
+	}
+}
+
+void
+setupepoll(void)
+{
+	epoll_fd = epoll_create1(0);
+	dpy_fd = ConnectionNumber(dpy);
+	struct epoll_event dpy_event;
+
+	// Initialize struct to 0
+	memset(&dpy_event, 0, sizeof(dpy_event));
+
+	DEBUG("Display socket is fd %d\n", dpy_fd);
+
+	if (epoll_fd == -1)
+		fputs("Failed to create epoll file descriptor", stderr);
+
+	dpy_event.events = EPOLLIN;
+	dpy_event.data.fd = dpy_fd;
+	if (epoll_ctl(epoll_fd, EPOLL_CTL_ADD, dpy_fd, &dpy_event)) {
+		fputs("Failed to add display file descriptor to epoll", stderr);
+		close(epoll_fd);
+		exit(1);
+	}
+
+	if (ipc_init(ipcsockpath, epoll_fd, ipccommands, LENGTH(ipccommands)) < 0)
+		fputs("Failed to initialize IPC\n", stderr);
+}