[Qemu-devel] [PATCH 1/5] QLIST-ify display change listeners.

[Gerd Hoffmann <kraxel@redhat.com>]

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 console.h  |   72 +++++++++++++++++++++++++++++++----------------------------
 hw/xenfb.c |    2 +-
 vl.c       |    9 ++-----
 3 files changed, 42 insertions(+), 41 deletions(-)

diff --git a/console.h b/console.h
index aafb031..2263971 100644
--- a/console.h
+++ b/console.h
@@ -162,7 +162,7 @@ struct DisplayChangeListener {
                      int w, int h, uint32_t c);
     void (*dpy_text_cursor)(struct DisplayState *s, int x, int y);
 
-    struct DisplayChangeListener *next;
+    QLIST_ENTRY(DisplayChangeListener) next;
 };
 
 struct DisplayAllocator {
@@ -177,7 +177,7 @@ struct DisplayState {
     struct QEMUTimer *gui_timer;
 
     struct DisplayAllocator* allocator;
-    struct DisplayChangeListener* listeners;
+    QLIST_HEAD(, DisplayChangeListener) listeners;
 
     void (*mouse_set)(int x, int y, int on);
     void (*cursor_define)(QEMUCursor *cursor);
@@ -225,72 +225,76 @@ static inline int is_buffer_shared(DisplaySurface *surface)
 
 static inline void register_displaychangelistener(DisplayState *ds, DisplayChangeListener *dcl)
 {
-    dcl->next = ds->listeners;
-    ds->listeners = dcl;
+    QLIST_INSERT_HEAD(&ds->listeners, dcl, next);
 }
 
 static inline void dpy_update(DisplayState *s, int x, int y, int w, int h)
 {
-    struct DisplayChangeListener *dcl = s->listeners;
-    while (dcl != NULL) {
+    struct DisplayChangeListener *dcl;
+    QLIST_FOREACH(dcl, &s->listeners, next) {
         dcl->dpy_update(s, x, y, w, h);
-        dcl = dcl->next;
     }
 }
 
 static inline void dpy_resize(DisplayState *s)
 {
-    struct DisplayChangeListener *dcl = s->listeners;
-    while (dcl != NULL) {
+    struct DisplayChangeListener *dcl;
+    QLIST_FOREACH(dcl, &s->listeners, next) {
         dcl->dpy_resize(s);
-        dcl = dcl->next;
     }
 }
 
 static inline void dpy_setdata(DisplayState *s)
 {
-    struct DisplayChangeListener *dcl = s->listeners;
-    while (dcl != NULL) {
-        if (dcl->dpy_setdata) dcl->dpy_setdata(s);
-        dcl = dcl->next;
+    struct DisplayChangeListener *dcl;
+    QLIST_FOREACH(dcl, &s->listeners, next) {
+        if (dcl->dpy_setdata) {
+            dcl->dpy_setdata(s);
+        }
     }
 }
 
 static inline void dpy_refresh(DisplayState *s)
 {
-    struct DisplayChangeListener *dcl = s->listeners;
-    while (dcl != NULL) {
-        if (dcl->dpy_refresh) dcl->dpy_refresh(s);
-        dcl = dcl->next;
+    struct DisplayChangeListener *dcl;
+    QLIST_FOREACH(dcl, &s->listeners, next) {
+        if (dcl->dpy_refresh) {
+            dcl->dpy_refresh(s);
+        }
     }
 }
 
 static inline void dpy_copy(struct DisplayState *s, int src_x, int src_y,
-                             int dst_x, int dst_y, int w, int h) {
-    struct DisplayChangeListener *dcl = s->listeners;
-    while (dcl != NULL) {
-        if (dcl->dpy_copy)
+                             int dst_x, int dst_y, int w, int h)
+{
+    struct DisplayChangeListener *dcl;
+    QLIST_FOREACH(dcl, &s->listeners, next) {
+        if (dcl->dpy_copy) {
             dcl->dpy_copy(s, src_x, src_y, dst_x, dst_y, w, h);
-        else /* TODO */
+        } else { /* TODO */
             dcl->dpy_update(s, dst_x, dst_y, w, h);
-        dcl = dcl->next;
+        }
     }
 }
 
 static inline void dpy_fill(struct DisplayState *s, int x, int y,
-                             int w, int h, uint32_t c) {
-    struct DisplayChangeListener *dcl = s->listeners;
-    while (dcl != NULL) {
-        if (dcl->dpy_fill) dcl->dpy_fill(s, x, y, w, h, c);
-        dcl = dcl->next;
+                             int w, int h, uint32_t c)
+{
+    struct DisplayChangeListener *dcl;
+    QLIST_FOREACH(dcl, &s->listeners, next) {
+        if (dcl->dpy_fill) {
+            dcl->dpy_fill(s, x, y, w, h, c);
+        }
     }
 }
 
-static inline void dpy_cursor(struct DisplayState *s, int x, int y) {
-    struct DisplayChangeListener *dcl = s->listeners;
-    while (dcl != NULL) {
-        if (dcl->dpy_text_cursor) dcl->dpy_text_cursor(s, x, y);
-        dcl = dcl->next;
+static inline void dpy_cursor(struct DisplayState *s, int x, int y)
+{
+    struct DisplayChangeListener *dcl;
+    QLIST_FOREACH(dcl, &s->listeners, next) {
+        if (dcl->dpy_text_cursor) {
+            dcl->dpy_text_cursor(s, x, y);
+        }
     }
 }
 
diff --git a/hw/xenfb.c b/hw/xenfb.c
index da5297b..5076beb 100644
--- a/hw/xenfb.c
+++ b/hw/xenfb.c
@@ -706,7 +706,7 @@ static void xenfb_update(void *opaque)
 	if (xenfb_queue_full(xenfb))
 	    return;
 
-        for (l = xenfb->c.ds->listeners; l != NULL; l = l->next) {
+        QLIST_FOREACH(l, &xenfb->c.ds->listeners, next) {
             if (l->idle)
                 continue;
             idle = 0;
diff --git a/vl.c b/vl.c
index e5e43b3..34aa388 100644
--- a/vl.c
+++ b/vl.c
@@ -1045,16 +1045,15 @@ static void gui_update(void *opaque)
 {
     uint64_t interval = GUI_REFRESH_INTERVAL;
     DisplayState *ds = opaque;
-    DisplayChangeListener *dcl = ds->listeners;
+    DisplayChangeListener *dcl;
 
     qemu_flush_coalesced_mmio_buffer();
     dpy_refresh(ds);
 
-    while (dcl != NULL) {
+    QLIST_FOREACH(dcl, &ds->listeners, next) {
         if (dcl->gui_timer_interval &&
             dcl->gui_timer_interval < interval)
             interval = dcl->gui_timer_interval;
-        dcl = dcl->next;
     }
     qemu_mod_timer(ds->gui_timer, interval + qemu_get_clock(rt_clock));
 }
@@ -2925,14 +2924,12 @@ int main(int argc, char **argv, char **envp)
     }
     dpy_resize(ds);
 
-    dcl = ds->listeners;
-    while (dcl != NULL) {
+    QLIST_FOREACH(dcl, &ds->listeners, next) {
         if (dcl->dpy_refresh != NULL) {
             ds->gui_timer = qemu_new_timer(rt_clock, gui_update, ds);
             qemu_mod_timer(ds->gui_timer, qemu_get_clock(rt_clock));
             break;
         }
-        dcl = dcl->next;
     }
 
     if (display_type == DT_NOGRAPHIC || display_type == DT_VNC) {
-- 
1.6.5.2