Re: [dev] Linking against rt in dwm

[Eric Pruitt]

On Mon, Jul 07, 2014 at 11:23:35PM -0400, Lee Fallat wrote:
> Do you have the right #include statements? Show us your patch as if
> you were about to submit it so someone can help you :)

I've attached the diff to this email. I only saw time.h mentioned in the
man page, so that's the only include I added.

Eric

diff --git a/config.mk b/config.mk
index 49e182e..8231f68 100644
--- a/config.mk
+++ b/config.mk
@@ -16,7 +16,7 @@ X11LIB = /usr/X11R6/lib
 
 # includes and libs
 INCS = -I${X11INC}
-LIBS = -L${X11LIB} -lX11 ${XINERAMALIBS}
+LIBS = -L${X11LIB} -lX11 ${XINERAMALIBS} -lrt
 
 # flags
 CPPFLAGS = -D_BSD_SOURCE -D_POSIX_C_SOURCE=2 -DVERSION=\"${VERSION}\" ${XINERAMAFLAGS}
diff --git a/dwm.c b/dwm.c
index ffc8864..009a41d 100644
--- a/dwm.c
+++ b/dwm.c
@@ -30,6 +30,7 @@
 #include <unistd.h>
 #include <sys/types.h>
 #include <sys/wait.h>
+#include <time.h>
 #include <X11/cursorfont.h>
 #include <X11/keysym.h>
 #include <X11/Xatom.h>
@@ -96,6 +97,7 @@ struct Client {
 	Client *snext;
 	Monitor *mon;
 	Window win;
+	double ft;
 };
 
 typedef struct {
@@ -177,6 +179,7 @@ static void grabkeys(void);
 static void incnmaster(const Arg *arg);
 static void keypress(XEvent *e);
 static void killclient(const Arg *arg);
+static void lastclient();
 static void manage(Window w, XWindowAttributes *wa);
 static void mappingnotify(XEvent *e);
 static void maprequest(XEvent *e);
@@ -1004,6 +1007,20 @@ killclient(const Arg *arg) {
 }
 
 void
+lastclient() {
+	Client *c, *o;
+	for (o = selmon->sel, c = selmon->clients; c; c = c->next) {
+		if (ISVISIBLE(c) && c != selmon->sel && (o == selmon->sel || c->ft > o->ft)) {
+			o = c;
+		}
+	}
+
+	if (o != selmon->sel) {
+		focus(o);
+	}
+}
+
+void
 manage(Window w, XWindowAttributes *wa) {
 	Client *c, *t = NULL;
 	Window trans = None;
@@ -1012,6 +1029,7 @@ manage(Window w, XWindowAttributes *wa) {
 	if(!(c = calloc(1, sizeof(Client))))
 		die("fatal: could not malloc() %u bytes\n", sizeof(Client));
 	c->win = w;
+	c->ft = 0;
 	updatetitle(c);
 	if(XGetTransientForHint(dpy, w, &trans) && (t = wintoclient(trans))) {
 		c->mon = t->mon;
@@ -1423,11 +1441,17 @@ sendevent(Client *c, Atom proto) {
 
 void
 setfocus(Client *c) {
+	struct timespec t;
 	if(!c->neverfocus) {
 		XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
 		XChangeProperty(dpy, root, netatom[NetActiveWindow],
  		                XA_WINDOW, 32, PropModeReplace,
  		                (unsigned char *) &(c->win), 1);
+		if (clock_gettime(CLOCK_MONOTONIC, &t)) {
+			perror("clock_gettime");
+		} else {
+			c->ft = (double) t.tv_sec + t.tv_nsec * 0.000000001;
+		}
 	}
 	sendevent(c, wmatom[WMTakeFocus]);
 }