Changeset 1e3ea91 in mainline

Timestamp:

2013-04-21T16:45:39Z (12 years ago)

Author:

Petr Koupy <petr.koupy@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

21eeb653

Parents:

289cb7dd

Message:

Destroy orphaned windows in the compositor after the client is killed.

File:

• uspace/srv/hid/compositor/compositor.c (modified) (9 diffs)

uspace/srv/hid/compositor/compositor.c

@@ -90 +90 @@
 typedef struct {
         link_t link;
+        atomic_t ref_cnt;
         service_id_t in_dsid;
         service_id_t out_dsid;
@@ -215 +216 @@
 
         link_initialize(&win->link);
+        atomic_set(&win->ref_cnt, 0);
         prodcons_initialize(&win->queue);
         transform_identity(&win->transform);
@@ -232 +234 @@
 static void window_destroy(window_t *win)
 {
-        if (win) {
+        if (win && atomic_get(&win->ref_cnt) == 0) {
+                while (!list_empty(&win->queue.list)) {
+                        window_event_t *event = (window_event_t *) list_first(&win->queue.list);
+                        list_remove(&event->link);
+                        free(event);
+                }
+
                 if (win->surface) {
                         surface_destroy(win->surface);
@@ -695 +703 @@
         }
 
+        loc_service_unregister(win->in_dsid);
+        loc_service_unregister(win->out_dsid);
+
+        /* In case the client was killed, input fibril of the window might be
+         * still blocked on the condition within comp_window_get_event. */
+        window_event_t *event_dummy = (window_event_t *) malloc(sizeof(window_event_t));
+        if (event_dummy) {
+                link_initialize(&event_dummy->link);
+                prodcons_produce(&win->queue, &event_dummy->link);
+        }
+
         /* Calculate damage. */
         sysarg_t x = 0;
@@ -706 +725 @@
         }
 
-        /* Release window resources. */
-        loc_service_unregister(win->in_dsid);
-        loc_service_unregister(win->out_dsid);
-        while (!list_empty(&win->queue.list)) {
-                list_remove(list_first(&win->queue.list));
-        }
-        window_destroy(win);
-
         comp_damage(x, y, width, height);
 
@@ -813 +824 @@
 
         if (win) {
+                atomic_inc(&win->ref_cnt);
                 async_answer_0(iid, EOK);
         } else {
@@ -825 +837 @@
 
                         if (!IPC_GET_IMETHOD(call)) {
-                                async_answer_0(callid, EINVAL);
+                                async_answer_0(callid, EOK);
+                                atomic_dec(&win->ref_cnt);
+                                window_destroy(win);
                                 return;
                         }
@@ -842 +856 @@
 
                         if (!IPC_GET_IMETHOD(call)) {
-                                async_answer_0(callid, EINVAL);
+                                comp_window_close(win, callid, &call);
+                                atomic_dec(&win->ref_cnt);
+                                window_destroy(win);
                                 return;
                         }
@@ -857 +873 @@
                                 break;
                         case WINDOW_CLOSE:
-                                comp_window_close(win, callid, &call);
+                                /* Postpone the closing until the phone is hung up to cover
+                                 * the case when the client is killed abruptly. */
+                                async_answer_0(callid, EOK);
                                 break;
                         case WINDOW_CLOSE_REQUEST: