merge the (rest of) texmem branch

src/glx/x11/glxext.c

@@ -722,6 +722,68 @@ static const __DRIinterfaceMethods interface_methods = {
     __glXGetMscRateOML,
 };
 
+#define DRM_MAX_FDS 16
+static struct {
+   char *BusID;
+   int fd;
+   int refcount;
+} connection[DRM_MAX_FDS];
+
+static int nr_fds = 0;
+
+int drmOpenOnce(void *unused, 
+		const char *BusID,
+		int *newlyopened)
+{
+   int i;
+   int fd;
+   
+   for (i = 0; i < nr_fds; i++)
+      if (strcmp(BusID, connection[i].BusID) == 0) {
+	 connection[i].refcount++;
+	 *newlyopened = 0;
+	 return connection[i].fd;
+      }
+
+   fd = drmOpen(unused, BusID);
+   if (fd <= 0 || nr_fds == DRM_MAX_FDS)
+      return fd;
+   
+   connection[nr_fds].BusID = strdup(BusID);
+   connection[nr_fds].fd = fd;
+   connection[nr_fds].refcount = 1;
+   *newlyopened = 1;
+
+   fprintf(stderr, "saved connection %d for %s %d\n", 
+	  nr_fds, connection[nr_fds].BusID, 
+	  strcmp(BusID, connection[nr_fds].BusID));
+
+   nr_fds++;
+
+   return fd;   
+}
+
+void drmCloseOnce(int fd)
+{
+   int i;
+
+   
+
+   for (i = 0; i < nr_fds; i++) {
+      if (fd == connection[i].fd) {
+	 if (--connection[i].refcount == 0) {
+	    drmClose(connection[i].fd);
+	    free(connection[i].BusID);
+	    
+	    if (i < --nr_fds) 
+	       connection[i] = connection[nr_fds];
+
+	    return;
+	 }
+      }
+   }
+}
+
 
 /**
  * Perform the required libGL-side initialization and call the client-side
@@ -773,7 +835,8 @@ CallCreateNewScreen(Display *dpy, int scrn, __DRIscreen *psc,
     framebuffer.dev_priv = NULL;
 
     if (XF86DRIOpenConnection(dpy, scrn, &hSAREA, &BusID)) {
-	fd = drmOpen(NULL,BusID);
+        int newlyopened;
+	fd = drmOpenOnce(NULL,BusID, &newlyopened);
 	Xfree(BusID); /* No longer needed */
 
 	err_msg = "open DRM";
@@ -800,7 +863,7 @@ CallCreateNewScreen(Display *dpy, int scrn, __DRIscreen *psc,
 		}
 
 		err_msg = "XF86DRIAuthConnection";
-		if (XF86DRIAuthConnection(dpy, scrn, magic)) {
+		if (!newlyopened || XF86DRIAuthConnection(dpy, scrn, magic)) {
 		    char *driverName;
 
 		    /*
@@ -904,7 +967,7 @@ CallCreateNewScreen(Display *dpy, int scrn, __DRIscreen *psc,
 	}
 
 	if ( fd >= 0 ) {
-	    (void)drmClose(fd);
+	    (void)drmCloseOnce(fd);
 	}
 
 	(void)XF86DRICloseConnection(dpy, scrn);